LocaleUtil.java

/*
 *  Copyright 2012 GWT-Bootstrap
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.github.gwtbootstrap.datetimepicker.client.ui.util;

import java.util.ArrayList;
import java.util.List;

import com.github.gwtbootstrap.client.ui.resources.JavaScriptInjector;
import com.github.gwtbootstrap.datetimepicker.client.ui.resources.Resources;
import com.google.gwt.resources.client.TextResource;

/**
 * A utility class to get the User's Browser Locale.
 *
 * @author Carlos A Becker
 * @author Alain Penders
 * @since 2.1.1.0
 */
public final class LocaleUtil {

	private static String locale = null;
	private static String LANGUAGE = null;

	private static List<String> loaded = new ArrayList<String>();

	private LocaleUtil(){

	}

	public static String getLanguage() {
		if (LANGUAGE == null) {
			setupLocale();
		}
		return LANGUAGE;
	}


	/**
	 * Get the string of locale based on user's browser configuration.
	 *
	 * @return
	 */
	public static String getLocale() {
		if (locale == null) {
			locale = getBrowserLocale();
		}
		return locale;
	}


	public static TextResource getLocaleJsResource() {
		String locale = getLocale();
		if (locale == null) {
			return null;
		}
		return setupLocale();
	}


	private static final native String getBrowserLocale() /*-{
       return $wnd.navigator.userLanguage || $wnd.navigator.language;
   }-*/;


	public static final void forceLocale(String locale_) {
		locale = locale_;
		TextResource t = setupLocale();
		if (loaded.contains(locale) && t != null) {
			JavaScriptInjector.inject(t.getText());
		}
	}


	private static TextResource setupLocale() {
		Resources r = Resources.RESOURCES;
		TextResource tr;

        /*
           Script used to gen the basic if-else block:
           for a in `ls`; do echo "else if(locale.equals(\"`echo $a | cut -f2 -d.`\")) { tr = r.`echo $a | cut -f2 -d.`(); LANGUAGE = \"`echo $a | cut -f2 -d.`\"; }"; done
        */

		if (locale.equals("bg")) {
			tr = r.bg();
			LANGUAGE = "bg";
		}
		else if (locale.equals("ca")) {
			tr = r.cs();
			LANGUAGE = "ca";
		}
		else if (locale.equals("cs")) {
			tr = r.cs();
			LANGUAGE = "cs";
		}
		else if (locale.equals("da")) {
			tr = r.da();
			LANGUAGE = "da";
		}
		else if (locale.equals("de")) {
			tr = r.de();
			LANGUAGE = "de";
		}
		else if (locale.equals("el")) {
			tr = r.es();
			LANGUAGE = "el";
		}
		else if (locale.equals("es")) {
			tr = r.es();
			LANGUAGE = "es";
		}
		else if (locale.equals("fi")) {
			tr = r.fi();
			LANGUAGE = "fi";
		}
		else if (locale.equals("fr")) {
			tr = r.fr();
			LANGUAGE = "fr";
		}
		else if (locale.equals("he")) {
			tr = r.id();
			LANGUAGE = "he";
		}
		else if (locale.equals("hr")) {
			tr = r.id();
			LANGUAGE = "hr";
		}
		else if (locale.equals("id")) {
			tr = r.id();
			LANGUAGE = "id";
		}
		else if (locale.equals("is")) {
			tr = r.is();
			LANGUAGE = "is";
		}
		else if (locale.equals("it")) {
			tr = r.it();
			LANGUAGE = "it";
		}
		else if (locale.equals("ja")) {
			tr = r.ja();
			LANGUAGE = "ja";
		}
		else if (locale.equals("kr")) {
			tr = r.kr();
			LANGUAGE = "kr";
		}
		else if (locale.equals("lt")) {
			tr = r.lt();
			LANGUAGE = "lt";
		}
		else if (locale.equals("lv")) {
			tr = r.lv();
			LANGUAGE = "lv";
		}
		else if (locale.equals("ms")) {
			tr = r.ms();
			LANGUAGE = "ms";
		}
		else if (locale.equals("nb")) {
			tr = r.nb();
			LANGUAGE = "nb";
		}
		else if (locale.equals("nl")) {
			tr = r.nl();
			LANGUAGE = "nl";
		}
		else if (locale.equals("pl")) {
			tr = r.pl();
			LANGUAGE = "pl";
		}
		else if (locale.equals("pt-BR")) {
			tr = r.pt_BR();
			LANGUAGE = "pt-BR";
		}
		else if (locale.equals("pt")) {
			tr = r.pt();
			LANGUAGE = "pt";
		}
		else if (locale.equals("ro")) {
			tr = r.ru();
			LANGUAGE = "ro";
		}
		else if (locale.equals("ru")) {
			tr = r.ru();
			LANGUAGE = "ru";
		}
		else if (locale.equals("sk")) {
			tr = r.sl();
			LANGUAGE = "sk";
		}
		else if (locale.equals("sl")) {
			tr = r.sl();
			LANGUAGE = "sl";
		}
		else if (locale.equals("sv")) {
			tr = r.sv();
			LANGUAGE = "sv";
		}
		else if (locale.equals("sw")) {
			tr = r.sv();
			LANGUAGE = "sw";
		}
		else if (locale.equals("th")) {
			tr = r.th();
			LANGUAGE = "th";
		}
		else if (locale.equals("tr")) {
			tr = r.tr();
			LANGUAGE = "tr";
		}
		else if (locale.equals("uk")) {
			tr = r.tr();
			LANGUAGE = "uk";
		}
		else if (locale.equals("zh-CN")) {
			tr = r.zh_CN();
			LANGUAGE = "zh-TW";
		}
		else if (locale.equals("zh-TW")) {
			tr = r.zh_TW();
			LANGUAGE = "zh-TW";
		}
		else {
			tr = null;
			LANGUAGE = "en";
		}

		loaded.add(LANGUAGE);

		return tr;
	}
}