MediaWiki:LanguageHandler.js
From Open Educational Resources
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// <source lang="javascript">
/*
Some basic language support, use by the upload form rewrite.
Author: [[User:Lupo]], January 2008
License: Quadruple licensed GFDL, GPL, LGPL and Creative Commons Attribution 3.0 (CC-BY-3.0)
Choose whichever license of these you like best :-)
*/
var LanguageHandler = {
languages : new Array (
// Sorted by language name, not language code! Except for strange scripts...
{text : 'English', lang : 'en'},
{text : 'తెలుగు', lang : 'te'}
),
getSelect : function (id, preSelect, unknownLabel)
{
var select = document.createElement ('select');
if (id != null) {
select.setAttribute ('id', id);
select.setAttribute ('name', id);
}
// Must have a text node. IE6 doesn't know Node.TEXT_NODE...
while (unknownLabel && unknownLabel.nodeType != 3)
unknownLabel = unknownLabel.firstChild;
if (unknownLabel) {
var unknown_option = document.createElement ('option');
unknown_option.setAttribute ('value', 'unknown');
unknown_option.appendChild (
document.createTextNode (unknownLabel.data.replace (/^\s+/, "").replace (/\s+$/, "")));
if (preSelect == null) unknown_option.setAttribute ('selected', 'selected');
select.appendChild (unknown_option);
}
for (var i = 0; i < LanguageHandler.languages.length; i++) {
var option = document.createElement ('option');
option.setAttribute ('value', LanguageHandler.languages[i].lang);
if (LanguageHandler.languages[i].lang == preSelect)
option.setAttribute ('selected', 'selected');
option.appendChild (document.createTextNode (LanguageHandler.languages[i].text));
select.appendChild (option);
}
return select;
},
closestIndex : function (langCode)
{
if (typeof (langCode) != 'string' || langCode == null || langCode.length == 0) return -1;
// Check if we have it.
if (langCode == 'nan' || langCode == 'minnan') langCode = 'zh-min-nan';
for (var i = 0; i < LanguageHandler.languages.length; i++) {
if (LanguageHandler.languages[i].lang == langCode) return i;
}
// Check for prefix
var dash = langCode.indexOf ('-');
if (dash >= 0)
return LanguageHandler.closestIndex (langCode.substring (0, dash));
return -1;
},
closestLanguage : function (langCode)
{
var idx = LanguageHandler.closestIndex (langCode);
if (idx < 0) return null;
return LanguageHandler.languages[idx].lang;
},
getPrefix : function (langStr)
{
// Given a string, check if any prefix substring matches one of the language codes. If so, return
// the length of the longest matching language code, otherwise, return zero.
// Note: if languageHandler.languages were sorted by length of language code, this could be sped up
// by stopping on the first match. But the benefits of human-readability of the list in alphabetical
// order outweigh this performance consideration.
var match_length = 0;
for (var i = 0; i < LanguageHandler.languages.length; i++) {
var l = LanguageHandler.languages[i].lang.length;
if ( l <= langStr.length && l > match_length
&& langStr.substr (0, l) == LanguageHandler.languages[i].lang)
match_length = l;
}
return match_length;
}
} // end LanguageHandler
// </source>
