Module:Lang
--[=[
Lua support for the error: {{lang}}: unknown language code: missing (help) and Template:Lang-xx templates and replacement of various supporting templates.
]=]
require('Module:No globals'); local p = {};
local getArgs = require ('Module:Arguments').getArgs; local lang_name_table = mw.loadData ('Module:Language/name/data');
local lang_data = mw.loadData ('Module:Lang/data'); -- language name override and transliteration tool-tip tables
local namespace = mw.title.getCurrentTitle().namespace; -- used for categorization
--[[--------------------------< 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
--[[--------------------------< T O _ B O O L E A N >---------------------------------------------------------- Returns true for 'yes', false for 'no', and nil for any other value. ]]
local function to_boolean (param) if param == 'yes' then return true elseif param == 'no' then return false else return nil end end
--[[--------------------------< I N _ A R R A Y >--------------------------------------------------------------
Whether needle is in haystack
]]
local function in_array( needle, haystack ) if needle == nil then return false; end for n,v in ipairs( haystack ) do if v == needle then return n; end end return 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 case script: sentence case region: upper case variant: lower case
]]
local function format_ietf_tag (code, script, region, variant) local out = {}; local c;
table.insert (out, code:lower()); if is_set (script) then c = script:match ('^%a'):upper(); -- make script sentence case script = script:lower():gsub ('^%a', c, 1); table.insert (out, script); end
if is_set (region) then table.insert (out, region:upper()); end
if is_set (variant) then table.insert (out, variant:lower()); end
return 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 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
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
each of lang, script, region, and variant, when used, must be valid
returns four values. Valid parts are returned as themselves; omitted parts are returned as empty strings, invalid parts are returned as nil.
see http://www.rfc-editor.org/rfc/bcp/bcp47.txt section 2.1
]]
local function get_ietf_parts (source) local code; local script = ; local region = ; local variant = ; local c;
if not is_set (source) then return nil, nil, nil, nil; end
if 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]+$') then -- ll-DDD-variant (where region is 3 digits; variant is 4 digits) code, region, variant = source:match ('^(%a%a%a?)%-(%d%d%d)%-([%a%d][%a%d][%a%d][%a%d][%a%d][%a%d]?[%a%d]?[%a%d]?)$');
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]+$') then -- ll-variant (where variant is 5-8 alnum characters) code, variant = source:match ('^(%a%a%a?)%-([%a%d][%a%d][%a%d][%a%d][%a%d][%a%d]?[%a%d]?[%a%d]?)$');
elseif source:match ('^%a%a%a?%-%a%a%a%a%-%a%a$') then -- ll-Ssss-RR code, script, region = source:match ('^(%a%a%a?)%-(%a%a%a%a)%-(%a%a)$'); 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$') then -- ll-Ssss code, script = source:match ('^(%a%a%a?)%-(%a%a%a%a)$');
elseif source:match ('^%a%a%a?%-%a%a$') then -- ll-RR code, region = source:match ('^(%a%a%a?)%-(%a%a)$'); 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?$') then -- ll code = source:match ('^(%a%a%a?)$');
elseif source:match ('^1%a+$') then -- special case for two Linguist list identifiers in Module:Lang/data override table code = source:match ('^(1%a%a)$'); -- these may need tweaks in future if other alphanumeric Linguist list identifiers are added
else return nil, nil, nil, nil; -- 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
if not (lang_data.override[code] or lang_name_table.lang[code]) then return nil, nil, nil, nil; -- invalid language code, don't know about the others (don't care?) end
if is_set (script) then script = script:lower(); -- ensure that we use and return lower case version of this if not lang_name_table.script[script] then return code, nil, nil, nil; -- language code ok, invalid script, don't know about the others (don't care?) end end
if is_set (region) then region = region:lower(); -- ensure that we use and return lower case version of this if not lang_name_table.region[region] then return code, script, nil, nil; end end
if is_set (variant) then variant = variant:lower(); -- ensure that we use and return lower case version of this if not lang_name_table.variant[variant] then return code, script, region, nil; end -- does this duplicate/replace tests in lang() and lang_xx()? if not in_array (code, lang_name_table.variant[variant]['prefixes']) and not in_array (table.concat ({code, '-', script}), lang_name_table.variant[variant]['prefixes']) then return code, script, region, nil; end end
return code, script, region, variant; -- return the good bits end
--[=[-------------------------< M A K E _ E R R O R _ M S G >--------------------------------------------------
]=]
local function make_error_msg (msg, nocat) local out = {};
table.insert (out, 'error: '); table.insert (out, msg); table.insert (out, ' (help)') table.insert (out, '');
if (0 == namespace) and not is_set (nocat) then -- only categorize in article space table.insert (out, ); end
return 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 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.
]=]
local function make_wikilink (link, display) if is_set (link) then if is_set (display) then return table.concat ({'', display, ''}); else return table.concat ({'', link, ''}); end else return ; end end
--[[--------------------------< M A K E _ T E X T _ S P A N >--------------------------------------------------
]]
local function make_text_span (code, text, rtl, italic, size) local span = {};
table.insert (span, '<span lang="'); -- open tag table.insert (span, code); -- language attribute table.insert (span, '"'); if rtl then table.insert (span, ' dir="rtl"'); -- for right to left languages end if is_set (size) then -- error: {{lang}}: unknown language code: missing (help) only table.insert (span, table.concat ({' style="font-size:', size, ';"'})) end table.insert (span, '>'); -- close the opening span tag if italic then table.insert (span, table.concat ({"", text, ""})); -- text with italic markup else table.insert (span, text); -- DEFAULT: text is not italicized end table.insert (span, ''); -- close the span if rtl then table.insert (span, ''); -- make sure the browser knows that we're at the end of the rtl end
return table.concat (span); -- put it all together and done end
--[[--------------------------< M A K E _ C A T E G O R Y >----------------------------------------------------
]]
local function make_category (code, language_name, nocat) local cat = {};
if (0 ~= namespace) or nocat then -- only categorize in article space return ; -- return empty string for concatenation end
table.insert (cat, '[[Category:Articles containing ');
if ('en' == code) or ('eng' == code) then table.insert (cat, 'explicitly cited English'); elseif 'art' == code then table.insert (cat, 'constructed') else table.insert (cat, language_name); end
table.insert (cat, '-language text]]');
return table.concat (cat); end
--[[--------------------------< M A K E _ T R A N S L I T >----------------------------------------------------
return translit ... else return empty string
The value |script= is not used in Script error: The function "transl" does not exist. for this purpose; instead it uses |code. Because language scripts are listed in the Script error: The function "transl" does not exist. switches they are included in the data tables. The script parameter is introduced at [[{{{2}}} language|{{{2}}}]]: error: {{lang}}: unknown language code: {{{1}}} (help). 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) ]]
local function make_translit (code, language_name, translit, std, tscript) 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 standards
table.insert (tout, "'); table.insert (tout, translit); table.insert (tout, ""); return 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 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.
Also protects single leading and trailing single quote marks from being converted to bold by the addition of adjacent italic markup.
]]
local function validate_text (template, args) if not is_set (args.text) then return make_error_msg (table.concat ({'Template:', template, ': no text'}), args.nocat); end
if 'lang-xx' == template then -- for the time being, this error checking does not apply to error: {{lang}}: unknown language code: missing (help) if args.text:find ("\'\'\'\'\'[\']+") then -- because we're looking, look for 6+ appostrophes return make_error_msg (table.concat ({'Template:', template, ': text has malformed markup'}), args.nocat); end
if args.text:match ("%f[\']\'\'[^\']+\'\'%f[^\']") or args.text:match ("\'\'\'\'\'[^\']+\'\'\'\'\'") then -- italic but not bold, or bold italic return make_error_msg (table.concat ({'Template:', template, ': text has italic markup'}), args.nocat); end
if args.text:find ("\'\'\'\'") then -- because we're looking, look for 4 apostrophes return make_error_msg (table.concat ({'Template:', template, ': text has malformed markup'}), args.nocat); end
if args.italic then -- protect single quote marks from being converted to bold markup args.text = args.text:gsub ("^\'[^\']+", "%1"); -- leading single quote mark args.text = args.text:gsub ("[^\']+\'$", "%1"); -- trailing single quote mark end end end
--[[--------------------------< S U B T A G _ C H E C K >------------------------------------------------------
checks the subtags: script, region, and variant to be valid and in agreement with any tags that are included in the main language code: if |script=Cyrl and language code is 'abq-Cyrl' the two script must agree (case insensitive)
returns the selected subtag and nil error message; returns empty string and nil error message when both language code subtag and matching subtag parameter are not set returns nil and error message else
]]
local function subtag_check (name, args_code, code_subtag, args_subtag, nocat)
if not is_set (code_subtag) and not is_set (args_subtag) then -- no subtags, then bale return ; -- empty string for concatenation end
args_subtag = args_subtag and args_subtag:lower(); -- so we only need do this once; prettify later if not is_set (code_subtag) then -- if no ietf subtag in args.code if is_set (args_subtag) then -- and if |<name>= has a value if lang_name_table[name][args_subtag] then -- and that value is legitimate subtag code_subtag = args_subtag; -- then use |<name>= else return nil, make_error_msg (table.concat ({'Template:Lang-xx: invalid ' .. name .. ': ', args_subtag}), nocat); end end else -- here when language code has a subtag if is_set (args_subtag) and (code_subtag ~= args_subtag) then -- if there is a subtag parameter then it must match return nil, make_error_msg (table.concat ({'Template:Lang-xx: code / ' .. name .. ' mismatch: ', args_code:lower(), ' / ', args_subtag}), nocat); end end
return code_subtag; end
--[[--------------------------< L A N G >----------------------------------------------------------------------
|code = the BCP47 language code |text = the displayed text in language specified by code |rtl = boolean true identifies the language specified by code as a right-to-left language |size = css keyword appropriate for use with css font-size:<size> |nocat = boolean true inhibits normal categorization; error categories are not affected
]]
function p.lang (frame) local args = getArgs(frame);
if args[1] and args.code then return make_error_msg ('error: {{lang}}: unknown language code: missing (help): conflicting: {{{1}}} and |code=', args.nocat); else args.code = args[1] or args.code; end
if args[2] and args.text then return make_error_msg ('error: {{lang}}: unknown language code: missing (help): conflicting: {{{2}}} and |text=', args.nocat); else args.text = args[2] or args.text; end
args.rtl = args.rtl == 'yes'; -- convert to boolean: 'yes' -> true, other values -> false args.italic = to_boolean(args.italic); -- convert to boolean or nil: 'yes' -> true, 'no' -> false; else nil
local out = {}; local language_name; local subtags = {}; local code;
code, subtags.script, subtags.region, subtags.variant = get_ietf_parts (args.code);
if not (code and subtags.script and subtags.region and subtags.variant) then return make_error_msg (table.concat ({'error: {{lang}}: unknown language code: missing (help): unknown language code: ', args.code or 'missing'}), args.nocat); end
local msg = validate_text ('lang', args); -- ensure that |text= is set (italic test disabled for the time being) if is_set (msg) then return msg; end
if is_set (subtags.script) then -- if script set override rtl setting if in_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
if is_set (subtags.variant) then -- special case test for |variant= if is_set (subtags.script) then if not in_array (table.concat ({code, '-', subtags.script}), lang_name_table.variant[subtags.variant]['prefixes']) then return make_error_msg (table.concat ({'error: {{lang}}: unknown language code: missing (help): invalid code-variant combination: ', code, '-', subtags.script, '-', subtags.variant}), args.nocat); end else if not in_array (code, lang_name_table.variant[subtags.variant]['prefixes']) then return make_error_msg (table.concat ({'error: {{lang}}: unknown language code: missing (help): invalid code-variant combination: ', code, '-', subtags.variant}), args.nocat); end end end
if nil == args.italic then -- args.italic controls if 'latn' == subtags.script then -- script set to latn args.italic = true; -- DEFAULT for error: {{lang}}: unknown language code: missing (help) templates is upright; but if latn script else args.italic = false; -- italic not set; script not latn end end
args.code = format_ietf_tag (code, subtags.script, subtags.region, subtags.variant); -- format to recommended subtag styles
if lang_data.override[code] then language_name = lang_data.override[code][1] elseif lang_name_table.lang[code] then language_name = lang_name_table.lang[code][1]; -- table entries sometimes have multiple names, always take the first one end
table.insert (out, make_text_span (args.code, args.text, args.rtl, args.italic, args.size)); table.insert (out, make_category (args.code, language_name, args.nocat)); return table.concat (out); -- put it all together and done end
--[[--------------------------< L A N G _ X X >----------------------------------------------------------------
|code = (required) the BCP47 language code |script = BCP47 script name; especially for use with languages that use multiple writing systems; yields to the script subtag in |code= if present [not yet implemented] |text = (required) the displayed text in language specified by code |link = boolean true (default) links language specified by code to associated language article |rtl = boolean true identifies the language specified by code as a right-to-left language |nocat = boolean true inhibits normal categorization; error categories are not affected |italic = boolean true (default) renders displayed text in italic font; when |italic= not set and |script= set to something other than Latn then args.italic='no' [not yet implemented] |lit = text that is a literal translation of text
for those Template:Lang-xx templates that support transliteration: |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 Template:Lang-xx, the positional parameters are: {{{1}}} text {{{2}}} transliterated text {{{3}}} literal translation text
]]
function p.lang_xx (frame) local args = getArgs(frame, {parentFirst= true}); -- parameters in the template override parameters set in the Script error: You must specify a function to call.; is that the right thing to do?
if args[1] and args.text then return make_error_msg ('Template:Lang-xx: conflicting: {{{1}}} and |text=', args.nocat); else args.text = args[1] or args.text; end
if args[2] and args.translit then return make_error_msg ('Template:Lang-xx: conflicting: {{{2}}} and |translit=', args.nocat); else args.translit = args[2] or args.translit end
if args[3] and (args.translation or args.lit) then return make_error_msg ('Template:Lang-xx: conflicting: {{{3}}} and |lit= or |translation=', args.nocat); elseif args.translation and args.lit then return make_error_msg ('Template:Lang-xx: conflicting: |lit= and |translation=', args.nocat); else args.translation = args[3] or args.translation or args.lit; end
if args.links and args.link then return make_error_msg ('Template:Lang-xx: conflicting: |links= and |link=', args.nocat); else args.link = args.link or args.links; end
args.size = nil; -- size not supported in Template:Lang-xx
args.rtl = args.rtl == 'yes'; -- convert to boolean: 'yes' -> true, other values -> false args.italic = to_boolean(args.italic); -- convert to boolean or nil: 'yes' -> true, 'no' -> false; else nil
local out = {}; local language_name; local subtags = {}; local code;
local translit_script; local translit; local translit_title;
code, subtags.script, subtags.region, subtags.variant = get_ietf_parts (args.code);
if not (code and subtags.script and subtags.region and subtags.variant) then return make_error_msg (table.concat ({'Template:Lang-xx: unknown language code: ', args.code or 'missing'}), args.nocat); end
local msg = validate_text ('lang-xx', args); -- ensure that |text= is set, does not contain italic markup and is protected from improper bolding if is_set (msg) then return msg; end
for name, value in pairs (subtags) do -- spin through the subtags table and consolidate code and parameter-provided language subtags subtags[name], msg = subtag_check (name, args.code, value, args[name], args.nocat); if not subtags[name] then return msg; -- some sort of error detected, return the error message end end
if is_set (subtags.script) then -- if script set override rtl setting if in_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
if is_set (subtags.variant) then -- special case test for |variant= if is_set (subtags.script) then if not in_array (table.concat ({code, '-', subtags.script}), lang_name_table.variant[subtags.variant]['prefixes']) then return make_error_msg (table.concat ({'error: {{lang}}: unknown language code: missing (help): invalid code-variant combination: ', code, '-', subtags.script, '-', subtags.variant}), args.nocat); end else if not in_array (code, lang_name_table.variant[subtags.variant]['prefixes']) then return make_error_msg (table.concat ({'error: {{lang}}: unknown language code: missing (help): invalid code-variant combination: ', code, '-', subtags.variant}), args.nocat); end end end
if args.italic == nil then -- args.italic controls if not is_set (subtags.script) or ('latn' == subtags.script) then -- script not set then default; script set to latn same args.italic = true; -- DEFAULT for Template:Lang-xx templates is to italicize else args.italic = false; -- italic not set; script not latn end end
args.code = format_ietf_tag (code, subtags.script, subtags.region, subtags.variant); -- format to recommended subtag styles
if lang_data.override[code] then language_name = lang_data.override[code][1] elseif lang_name_table.lang[code] then language_name = lang_name_table.lang[code][1]; -- table entries sometimes have multiple names, always take the first one end
translit_script = args['translit-script'] or language_name; -- for translit prefer |trans-script= over language
if 'no' == args.link then table.insert (out, language_name); -- language name without wikilink else table.insert (out, make_wikilink (language_name .. ' language', language_name)); -- language name with wikilink end table.insert (out, ': '); -- separator
table.insert (out, make_text_span (args.code, args.text, args.rtl, args.italic, args.size))
if is_set (args.translit) then -- transliteration (not supported in error: {{lang}}: unknown language code: missing (help)); not supported in all Template:Lang-xx table.insert (out, ', '); translit_title = mw.title.makeTitle (0, 'Romanization of ' .. language_name) if translit_title.exists and ('no' ~= args.link) then table.insert (out, make_wikilink ('Romanization of ' .. translit_script or language_name, 'translit.')); else table.insert (out, 'translit.'); end table.insert (out, ' '); translit = make_translit (args.code, language_name, args.translit, args['translit-std'], args['translit-script']) if is_set (translit) then table.insert (out, translit); else return make_error_msg (table.concat ({'Template:Lang-xx: invalid translit-std: \, args['translit-std'] or 'missing', '\' or transli-script: \, args['translit-script'] or 'missing', '\}), args.nocat); end end
if is_set (args.translation) then -- translation (not supported in error: {{lang}}: unknown language code: missing (help)) table.insert (out, ', '); if 'no' == args.link then table.insert (out, 'lit.'); else table.insert (out, make_wikilink ('Literal translation', 'lit.')); end table.insert (out, " '"); table.insert (out, args.translation); table.insert (out, "'"); end
table.insert (out, make_category (args.code, language_name, args.nocat)); return table.concat (out); -- put it all together and done end
return p;