| 1 | // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | package org.chromium.ui; |
| 6 | |
| 7 | import org.chromium.base.CalledByNative; |
| 8 | import org.chromium.base.JNINamespace; |
| 9 | |
| 10 | import android.os.Build; |
| 11 | import android.text.TextUtils; |
| 12 | import android.view.View; |
| 13 | |
| 14 | import java.util.Locale; |
| 15 | |
| 16 | /** |
| 17 | * This class provides the locale related methods for the native library. |
| 18 | */ |
| 19 | @JNINamespace("l10n_util") |
| 20 | public class LocalizationUtils { |
| 21 | |
| 22 | // This is mirrored from base/i18n/rtl.h. Please keep in sync. |
| 23 | public static final int UNKNOWN_DIRECTION = 0; |
| 24 | public static final int RIGHT_TO_LEFT = 1; |
| 25 | public static final int LEFT_TO_RIGHT = 2; |
| 26 | |
| 27 | private LocalizationUtils() { /* cannot be instantiated */ } |
| 28 | |
| 29 | /** |
| 30 | * @return the default locale, translating Android deprecated |
| 31 | * language codes into the modern ones used by Chromium. |
| 32 | */ |
| 33 | @CalledByNative |
| 34 | public static String getDefaultLocale() { |
| 35 | Locale locale = Locale.getDefault(); |
| 36 | String language = locale.getLanguage(); |
| 37 | String country = locale.getCountry(); |
| 38 | |
| 39 | // Android uses deprecated lanuages codes for Hebrew and Indonesian but Chromium uses the |
| 40 | // updated codes. Also, Android uses "tl" while Chromium uses "fil" for Tagalog/Filipino. |
| 41 | // So apply a mapping. |
| 42 | // See http://developer.android.com/reference/java/util/Locale.html |
| 43 | if ("iw".equals(language)) { |
| 44 | language = "he"; |
| 45 | } else if ("in".equals(language)) { |
| 46 | language = "id"; |
| 47 | } else if ("tl".equals(language)) { |
| 48 | language = "fil"; |
| 49 | } |
| 50 | return country.isEmpty() ? language : language + "-" + country; |
| 51 | } |
| 52 | |
| 53 | @CalledByNative |
| 54 | private static Locale getJavaLocale(String language, String country, String variant) { |
| 55 | return new Locale(language, country, variant); |
| 56 | } |
| 57 | |
| 58 | @CalledByNative |
| 59 | private static String getDisplayNameForLocale(Locale locale, Locale displayLocale) { |
| 60 | return locale.getDisplayName(displayLocale); |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * @return true if the system default layout direction is RTL, false otherwise. |
| 65 | * RTL layout support is from Jelly Bean MR1, so if the version is lower |
| 66 | * than that, it is always false. |
| 67 | */ |
| 68 | public static boolean isSystemLayoutDirectionRtl() { |
| 69 | if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) { |
| 70 | return TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()) |
| 71 | == View.LAYOUT_DIRECTION_RTL; |
| 72 | } |
| 73 | return false; |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * Jni binding to base::i18n::IsRTL. |
| 78 | * @return true if the current locale is right to left. |
| 79 | */ |
| 80 | public static boolean isRtl() { |
| 81 | return nativeIsRTL(); |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * Jni binding to base::i18n::GetFirstStrongCharacterDirection |
| 86 | * @param string String to decide the direction. |
| 87 | * @return One of the UNKNOWN_DIRECTION, RIGHT_TO_LEFT, and LEFT_TO_RIGHT. |
| 88 | */ |
| 89 | public static int getFirstStrongCharacterDirection(String string) { |
| 90 | return nativeGetFirstStrongCharacterDirection(string); |
| 91 | } |
| 92 | |
| 93 | private static native boolean nativeIsRTL(); |
| 94 | |
| 95 | private static native int nativeGetFirstStrongCharacterDirection(String string); |
| 96 | } |