| // Copyright 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| package org.chromium.ui.base; |
| |
| import android.os.Build; |
| import android.text.TextUtils; |
| import android.view.View; |
| |
| import org.chromium.base.CalledByNative; |
| import org.chromium.base.JNINamespace; |
| |
| import java.util.Locale; |
| |
| /** |
| * This class provides the locale related methods for the native library. |
| */ |
| @JNINamespace("l10n_util") |
| public class LocalizationUtils { |
| |
| // This is mirrored from base/i18n/rtl.h. Please keep in sync. |
| public static final int UNKNOWN_DIRECTION = 0; |
| public static final int RIGHT_TO_LEFT = 1; |
| public static final int LEFT_TO_RIGHT = 2; |
| |
| private LocalizationUtils() { /* cannot be instantiated */ } |
| |
| /** |
| * @return the default locale, translating Android deprecated |
| * language codes into the modern ones used by Chromium. |
| */ |
| @CalledByNative |
| public static String getDefaultLocale() { |
| Locale locale = Locale.getDefault(); |
| String language = locale.getLanguage(); |
| String country = locale.getCountry(); |
| |
| // Android uses deprecated lanuages codes for Hebrew and Indonesian but Chromium uses the |
| // updated codes. Also, Android uses "tl" while Chromium uses "fil" for Tagalog/Filipino. |
| // So apply a mapping. |
| // See http://developer.android.com/reference/java/util/Locale.html |
| if ("iw".equals(language)) { |
| language = "he"; |
| } else if ("in".equals(language)) { |
| language = "id"; |
| } else if ("tl".equals(language)) { |
| language = "fil"; |
| } |
| return country.isEmpty() ? language : language + "-" + country; |
| } |
| |
| @CalledByNative |
| private static Locale getJavaLocale(String language, String country, String variant) { |
| return new Locale(language, country, variant); |
| } |
| |
| @CalledByNative |
| private static String getDisplayNameForLocale(Locale locale, Locale displayLocale) { |
| return locale.getDisplayName(displayLocale); |
| } |
| |
| /** |
| * @return true if the system default layout direction is RTL, false otherwise. |
| * RTL layout support is from Jelly Bean MR1, so if the version is lower |
| * than that, it is always false. |
| */ |
| public static boolean isSystemLayoutDirectionRtl() { |
| if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) { |
| return TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()) |
| == View.LAYOUT_DIRECTION_RTL; |
| } |
| return false; |
| } |
| |
| /** |
| * Jni binding to base::i18n::IsRTL. |
| * @return true if the current locale is right to left. |
| */ |
| public static boolean isRtl() { |
| return nativeIsRTL(); |
| } |
| |
| /** |
| * Jni binding to base::i18n::GetFirstStrongCharacterDirection |
| * @param string String to decide the direction. |
| * @return One of the UNKNOWN_DIRECTION, RIGHT_TO_LEFT, and LEFT_TO_RIGHT. |
| */ |
| public static int getFirstStrongCharacterDirection(String string) { |
| return nativeGetFirstStrongCharacterDirection(string); |
| } |
| |
| /** |
| * Jni binding to ui::TimeFormat::TimeRemaining. Converts milliseconds to |
| * time remaining format : "3 mins left", "2 days left". |
| * @param timeInMillis time in milliseconds |
| * @return time remaining |
| */ |
| public static String getDurationString(long timeInMillis) { |
| return nativeGetDurationString(timeInMillis); |
| } |
| |
| private static native boolean nativeIsRTL(); |
| |
| private static native int nativeGetFirstStrongCharacterDirection(String string); |
| |
| private static native String nativeGetDurationString(long timeInMillis); |
| } |