mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-04 02:57:38 +00:00
94 lines
3.2 KiB
JavaScript
94 lines
3.2 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
this.EXPORTED_SYMBOLS = ["Locale"];
|
|
|
|
const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
|
|
|
|
Cu.import("resource://gre/modules/Services.jsm");
|
|
Cu.import("resource://gre/modules/Preferences.jsm");
|
|
|
|
const PREF_MATCH_OS_LOCALE = "intl.locale.matchOS";
|
|
const PREF_SELECTED_LOCALE = "general.useragent.locale";
|
|
|
|
this.Locale = {
|
|
/**
|
|
* Gets the currently selected locale for display.
|
|
* @return the selected locale or "en-US" if none is selected
|
|
*/
|
|
getLocale() {
|
|
if (Preferences.get(PREF_MATCH_OS_LOCALE, false))
|
|
return Services.locale.getLocaleComponentForUserAgent();
|
|
try {
|
|
let locale = Preferences.get(PREF_SELECTED_LOCALE, null, Ci.nsIPrefLocalizedString);
|
|
if (locale)
|
|
return locale;
|
|
}
|
|
catch (e) {}
|
|
return Preferences.get(PREF_SELECTED_LOCALE, "en-US");
|
|
},
|
|
|
|
/**
|
|
* Selects the closest matching locale from a list of locales.
|
|
*
|
|
* @param aLocales
|
|
* An array of locales
|
|
* @return the best match for the currently selected locale
|
|
*/
|
|
findClosestLocale(aLocales) {
|
|
let appLocale = this.getLocale();
|
|
|
|
// Holds the best matching localized resource
|
|
var bestmatch = null;
|
|
// The number of locale parts it matched with
|
|
var bestmatchcount = 0;
|
|
// The number of locale parts in the match
|
|
var bestpartcount = 0;
|
|
|
|
var matchLocales = [appLocale.toLowerCase()];
|
|
/* If the current locale is English then it will find a match if there is
|
|
a valid match for en-US so no point searching that locale too. */
|
|
if (matchLocales[0].substring(0, 3) != "en-")
|
|
matchLocales.push("en-us");
|
|
|
|
for (let locale of matchLocales) {
|
|
var lparts = locale.split("-");
|
|
for (let localized of aLocales) {
|
|
for (let found of localized.locales) {
|
|
found = found.toLowerCase();
|
|
// Exact match is returned immediately
|
|
if (locale == found)
|
|
return localized;
|
|
|
|
var fparts = found.split("-");
|
|
/* If we have found a possible match and this one isn't any longer
|
|
then we dont need to check further. */
|
|
if (bestmatch && fparts.length < bestmatchcount)
|
|
continue;
|
|
|
|
// Count the number of parts that match
|
|
var maxmatchcount = Math.min(fparts.length, lparts.length);
|
|
var matchcount = 0;
|
|
while (matchcount < maxmatchcount &&
|
|
fparts[matchcount] == lparts[matchcount])
|
|
matchcount++;
|
|
|
|
/* If we matched more than the last best match or matched the same and
|
|
this locale is less specific than the last best match. */
|
|
if (matchcount > bestmatchcount ||
|
|
(matchcount == bestmatchcount && fparts.length < bestpartcount)) {
|
|
bestmatch = localized;
|
|
bestmatchcount = matchcount;
|
|
bestpartcount = fparts.length;
|
|
}
|
|
}
|
|
}
|
|
// If we found a valid match for this locale return it
|
|
if (bestmatch)
|
|
return bestmatch;
|
|
}
|
|
return null;
|
|
},
|
|
};
|