Module:Template translation
Revision as of 20:40, 12 January 2014 by >Verdy p (preserve the namespace as it is resolved when testing other languages (may be needed for te main namespace) - workaround)
Documentation for this module may be created at Module:Template translation/doc
local this = {}
function this.checkLanguage(subpage, default)
--[[Check first if there's an apostrophe, because they break the isKnownLanguageTag
function. This test does not work with regexps, use plain search instead (no need
to use Unicode parser, apostrophes can only appear isolated as one byte in UTF-8).
]]
if (string.find(subpage, "'", 1, true) == nil)
then
-- Return the subpage only if it is a valid language code.
if (mw.language.isKnownLanguageTag(subpage))
then
return subpage
end
end
-- Otherwise there's currently no known language subpage
return default
end
--[[Get the last subpage of the current page if it is a translation.
]]
function this.getLanguageSubpage()
local subpage = mw.title.getCurrentTitle().subpageText
return this.checkLanguage(subpage, '')
end
--[[Get the last subpage of the current frame if it is a translation.
Not used locally.
]]
function this.getFrameLanguageSubpage(frame)
local titleparts = mw.text.split(frame:getParent():getTitle(), '/')
local subpage = titleparts[#titleparts]
return this.checkLanguage(subpage, '')
end
--[[Get the language of the current page.
Not used locally.
]]
function this.getLanguage()
local subpage = mw.title.getCurrentTitle().subpageText
return this.checkLanguage(subpage, mw.language.getContentLanguage():getCode())
end
--[[Get the language of the current frame.
Not used locally.
]]
function this.getFrameLanguage(frame)
local titleparts = mw.text.split(frame:getParent():getTitle(), '/')
local subpage = titleparts[#titleparts]
return this.checkLanguage(subpage, mw.language.getContentLanguage():getCode())
end
--[[If on a translation subpage (like Foobar/de), this function renders
a given template in the same language, if the translation is available.
Otherwise, the template is rendered in its default language, without
modification.
This is aimed at replacing the current implementation of Template:TNT.
]]
function this.renderTranslatedTemplate(frame)
local args = frame.args
local pagename = args['template']
--[[Check whether the pagename is actually in the Template namespace, or
if we're transcluding a main-namespace page.
(added for backward compatibility of Template:TNT)
]]
local title
local namespace = args['namespace'] or ''
if (namespace ~= '') -- Checks for namespace parameter for custom ns.
then
title = mw.title.new(pagename, namespace) -- Costly
else -- Supposes that set page is in ns10.
namespace = 'Template'
title = mw.title.new(pagename, namespace) -- Costly
if (title.id == 0)
then -- not found in the Template namespace, assume the main namespace (for backward compatibility)
namespace = ''
title = mw.title.new(pagename, namespace) -- Costly
end
end
-- At this point the title should exist, otherwise render a red link to the missing page
if (title.id == 0)
then
return '[[' .. title.prefixedText .. ']]'
end
-- Get the last subpage and check if it matches a known language code.
local subpage = this.getLanguageSubpage()
if (subpage == '')
then
-- Check if a translation of the pagename exists in English
local newtitle = mw.title.new(title.prefixedText .. '/' .. 'en', namespace) -- Costly
-- Use the translation when it exists
if (newtitle.id ~= 0)
then
title = newtitle
end
else
-- Check if a translation of the pagename exists in that language
local newtitle = mw.title.new(title.prefixedText .. '/' .. subpage, namespace) -- Costly
if (newtitle.id == 0)
then
-- Check if a translation of the pagename exists in English
newtitle = mw.title.new(title.prefixedText .. '/' .. 'en', namespace) -- Costly
end
-- Use the translation when it exists
if (newtitle.id ~= 0)
then
title = newtitle
end
end
-- Copy args pseudo-table to a proper table so we can feed it to expandTemplate.
-- Then render the pagename.
local arguments = {}
for k, v in pairs((frame:getParent() or {}).args) do
-- numbered args >= 1 need to be shifted
local n = tonumber(k) or 0
if (n > 0)
then
if (n >= 2)
then
arguments[n - 1] = v
end
else
arguments[k] = v
end
end
return frame:expandTemplate{title = title, args = arguments}
end
return this