User:Mike Dillon/Scripts/i18n.js

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/* <pre><nowiki> */
 
var wgMessageCache = {};
 
var wgFallbackLanguage;
 
function wfAddMsg(lang, key, value) {
    if (!wgMessageCache[lang]) {
        wgMessageCache[lang] = {};
    }
    wgMessageCache[lang][key.toLowerCase()] = value;
}
 
function wfMsgReal(key, forContent, args) {
    function wfMsgGet(lang, key) {
        if (!wgMessageCache[lang]) return null;
        return wgMessageCache[lang][key.toLowerCase()];
    }
 
    // Bail out of the key is null
    if (key == null) return null;
 
    var msg = null;
 
    // Look for message in user language
    if (!forContent) {
        msg = wfMsgGet(wgUserLanguage, key);
    }
 
    // Else, use content language
    if (msg == null) {
        msg = wfMsgGet(wgContentLanguage, key);
    }
 
    // Else, use fallback language
    if (msg == null && wgFallbackLanguage) {
        msg = wfMsgGet(wgFallbackLanguage, key);
    }
 
    // Else, use fallback text
    if (msg == null) {
        msg = "<" + key.toLowerCase() + ">";
    }
 
    // Replace positional placeholders (e.g. $1 or ${1})
    if (args.length > 1) {
        var re = /\$(?:([1-9]\d*)|\{([1-9]\d*)\})/g;
 
        var m;
        var toReplace = [];
        while (m = re.exec(msg)) {
            toReplace.push({
                'pos': re.lastIndex - m[0].length,
                'len': m[0].length,
                'arg': m[1] || m[2]
            });
        }
 
        var adjust = 0;
        for (var n in toReplace) {
            var replacement = args[toReplace[n].arg];
            if (replacement == null) continue;
            replacement = replacement.toString();
 
            toReplace[n].pos += adjust;
 
            msg = msg.substring(0, toReplace[n].pos)
                + replacement
                + msg.substring(toReplace[n].pos + toReplace[n].len);
 
            adjust += replacement.length - toReplace[n].len;
        }
    }
 
    return msg;
}
 
function wfMsg(key) {
    return wfMsgReal(key, false, arguments);
}
 
function wfMsgForContent(key) {
    return wfMsgReal(key, true, arguments);
}
 
/* </nowiki></pre> */