Module:Lang

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Revision as of 11:20, 2 November 2017 by meta>Trappist the monk
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Language templates
Languages (ISO 639)
Wiktionary links
Other
Data

This module exists primarily to provide correct html markup for non-English language text where that text is used in the English Wikipedia. It has a secondary purpose of providing correct visual rendering for this non-English text. The module was developed to consolidate processing for {{Lang}}, the {{lang-??}} (most), and {{Transl}} templates into a single source and to use a clearly defined data set extracted from international standards. It provides error checking and reporting to ensure that the html rendered is correct for browsers and screen readers.

Other templates that get language name support from this module are:

Data set

The data set is specified in Module:Language/name/data and its included data modules:

The data set also includes supplementary data modules:

Error messages and categorization

Mainspace articles that have errors are placed in appropriate error categories:

Maintenance categories:

See also

MoS on foreign words: 

--[=[
This is an experiment to see what is required to consolodate all of the myriad {{lang-xx}} templates
and their subtemplates into a single module with a data table

{{lang-es}} has parameters:
{{{1}}} text - required
{{{link}}} or {{{links}}} defaults to 'yes'
{{{lit}}} literal translation

{{language with name}} has parameters:
{{{1}}} iso language code - required
{{{2}}} language name in English - superfluous?
{{{3}}} text - required
{{{4}}} or {{{lit}}} literal translation
{{{link}}} or {{{links}}} set to 'no' disables '{{{2}} language' wikilinks
{{{rtl}}} passed through to {{lang}}
{{{nocat}}} passed through to {{lang}}

{{lang}} has parameters:
{{{1}}} iso language code - required
{{{2}}} text - required
{{{rtl}}} if set to any value, set rtl="rtl" attribute and inserts &lrm; after the </span> tag
{{{nocat}}} if set to any value, disables categorization

How it works now:
	1. {{lang-es}} receives text as {{{1}}} to which it adds italic markup, sets |links to {{{link}}} or {{{links}}} or yes, sets |lit to {{{lit}}}, and calls {{language with name}}.  {{{rtl}}} ignored for this example
	2. {{language with name}} renders [[Spanish language|Spanish]] ({{{links}}} not set) or Spanish ({{{links}}} set) and calls {{lang}}
	3. {{lang}} wraps the text in the <span lang="es">text</span> and adds categorization
]=]

require('Module:No globals');
local p = {};

local getArgs = require ('Module:Arguments').getArgs;
local lang_name_table = require ('Module:Language/name/data');

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.
This function is global because it is called from both this module and from Date validation

]]

local function is_set( var )
	return not (var == nil or var == '');
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.

]=]

local function make_wikilink (link, display)
	if is_set (link) then
		if is_set (display) then
			return table.concat ({'[[', link, '|', 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 <span> tag
	table.insert (span,  code);													-- language attribute
	table.insert (span, '"');
	if is_set (rtl) then
		table.insert (span, ' rtl="rtl"');										-- for right to left languages
	end
	if is_set (size) then														-- {{lang}} only
		table.insert (span, table.concat ({' style="font-size:', size, ';"'}))
	end
	table.insert (span, '>');													-- close the opening span tag
	if 'yes' == 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, '</span>');												-- close the span
	if is_set (rtl) then
		table.insert (span, '&lrm;');											-- 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 <span>...</span> else return empty string

]]

local function make_translit (code, language_name, translit, std, script)
	local title;
	local tout = {};
	local title_table = mw.loadData ('Module:Lang/data')
	table.insert (tout, "''<span title=\"");
	
	if not is_set (std) and not is_set (script) then
		table.insert (tout, language_name);
		table.insert (tout, ' transliteration');
	elseif is_set (std) and is_set (script) then
		if title_table.std.script then
			table.insert (tout, title_table.std.script);
		else
			return '';
		end
	elseif is_set (std) then
		if title_table.std.code then
			table.insert (tout, title_table.std.code);
		else
			table.insert (tout, title_table.std['default']);
		end
	else																		-- here if script set but std not set
		if title_table['NO_STD'].script then
			table.insert (tout, title_table['NO_STD'].script);
		elseif title_table['NO_STD'].code then
			table.insert (tout, title_table['NO_STD'].code);
		else
			table.insert (tout, language_name);
			table.insert (tout, ' transliteration');
		end
	end

	table.insert (tout, '" class="Unicode" style="white-space:normal; text-decoration:none">');
	table.insert (tout, translit);
	table.insert (tout, "</span>''");
	return table.concat (tout);
end


--[=[-------------------------< L A N G >----------------------------------------------------------------------

{{#invoke:lang|lang|code={{{1}}}|text={{{2}}}|rtl={{{rtl}}}|size={{{size}}}|nocat={{{nocat}}}}}

]=]

function p.lang (frame)
	local args = getArgs(frame);
	
	local out = {};
	local language_name;
	if lang_name_table.lang[args.code] then
		language_name = lang_name_table.lang[args.code][1];						-- table entries sometimes have multiple names, always take the first one
	end
	
	if not is_set (language_name) then
		table.insert (out, '<span style="font-size:100%" class="error">error: unknown language code: ');
		table.insert (out, args.code);
		table.insert (out, '</span>');
		
		if 0 ~= namespace then														-- only categorize in article space
			table.insert (out, '[[Category:Articles containing unknown language template codes|');
			table.insert (out, args.code);
			table.insert (out, ']]');
		end
		return table.concat (out);												-- emit an error message and category
	end
	
	table.insert (out, make_text_span (args.code, args.text, args.rtl, nil, args.size));		-- italics set to nil here because not supporte by {{lang}}
	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 >----------------------------------------------------------------

{{#invoke:lang|lang_xx|code={{{1}}}|text={{{2}}}|link={{{links|{{{link}}}}}}|rtl={{{rtl}}}|nocat={{{nocat}}}|italic={{{italic}}}|lit={{{lit}}}|translit={{{translit}}}|script={{{script}}}|std={{{std}}}}}

|code = the BCP47 language code
|text = 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
|lit = text that is a literal translation of text

for those {{lang-xx}} templates that support transliteration:
|translit = text that is a transliteration of text
|std = the standard that applies to the transliteration
|script = ISO 15924 script name; falls back to code

]=]

function p.lang_xx (frame)
	local args = getArgs(frame);
	
	if not is_set (args.italic) then
		args.italic = 'yes';													-- DEFAULT for {{lang-xx}} templates is to italicize
	end
	
	args.size = nil;															-- size not supported in {{lang-xx}}
	
	local out = {};
	local language_name;
	if lang_name_table.lang[args.code] then
		language_name = lang_name_table.lang[args.code][1];						-- table entries sometimes have multiple names, always take the first one
	end
	
	local script = args.script or language_name;									-- for translit prefer script of language
	local translit;
	
	if not is_set (language_name) then
		table.insert (out, '<span style="font-size:100%" class="error">error: unknown language code: ');
		table.insert (out, args.code);
		table.insert (out, '</span>');
		
		if 0 ~= namespace then														-- only categorize in article space
			table.insert (out, '[[Category:Articles containing unknown language template codes|');
			table.insert (out, args.code);
			table.insert (out, ']]');
		end
		return table.concat (out);												-- emit an error message and category
	end
	
	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 {{lang}}); not supported in all {{lang-xx}}
		table.insert (out, ', <small>');
		if mw.title.makeTitle (0, 'Romanization of ' .. language_name) then
			table.insert (out, make_wikilink ('Romanization of ' .. script or language_name, 'translit.'));
		else
			table.insert (out, '<abbr title="transliteration">translit.</abbr>');
		end
		table.insert (out, '&nbsp;</small>');
		translit = make_translit (args.code, language_name, args.translit, args.std, args.script)
		if is_set (translit) then
			table.insert (out, translit);
		else
			table.insert (out, '<span style="font-size:100%" class="error">error: invalid translit std or script');
		end
	end
	
	if is_set (args.lit) then													-- translation (not supported in {{lang}})
		table.insert (out, ', <small>');
		table.insert (out, make_wikilink ('Literal translation', 'lit.'));
		table.insert (out, "&nbsp;</small>'");
		table.insert (out, args.lit);
		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;
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