1/* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.support.v4.text; 18 19import android.os.Build; 20 21import java.util.Locale; 22 23public final class ICUCompat { 24 25 interface ICUCompatImpl { 26 public String maximizeAndGetScript(Locale locale); 27 } 28 29 static class ICUCompatImplBase implements ICUCompatImpl { 30 @Override 31 public String maximizeAndGetScript(Locale locale) { 32 return null; 33 } 34 } 35 36 static class ICUCompatImplIcs implements ICUCompatImpl { 37 @Override 38 public String maximizeAndGetScript(Locale locale) { 39 return ICUCompatIcs.maximizeAndGetScript(locale); 40 } 41 } 42 43 static class ICUCompatImplLollipop implements ICUCompatImpl { 44 @Override 45 public String maximizeAndGetScript(Locale locale) { 46 return ICUCompatApi23.maximizeAndGetScript(locale); 47 } 48 } 49 50 private static final ICUCompatImpl IMPL; 51 52 static { 53 final int version = Build.VERSION.SDK_INT; 54 if (version >= 21) { 55 IMPL = new ICUCompatImplLollipop(); 56 } else if (version >= 14) { 57 IMPL = new ICUCompatImplIcs(); 58 } else { 59 IMPL = new ICUCompatImplBase(); 60 } 61 } 62 63 /** 64 * Returns the script for a given Locale. 65 * 66 * If the locale isn't already in its maximal form, likely subtags for the provided locale 67 * ID are added before we determine the script. For further details, see the following CLDR 68 * technical report : 69 * 70 * http://www.unicode.org/reports/tr35/#Likely_Subtags 71 * 72 * If locale is already in the maximal form, or there is no data available for maximization, 73 * it will be just returned. For example, "und-Zzzz" cannot be maximized, since there is no 74 * reasonable maximization. 75 * 76 * Examples: 77 * 78 * "en" maximizes to "en_Latn_US" 79 * "de" maximizes to "de_Latn_US" 80 * "sr" maximizes to "sr_Cyrl_RS" 81 * "sh" maximizes to "sr_Latn_RS" (Note this will not reverse.) 82 * "zh_Hani" maximizes to "zh_Hans_CN" (Note this will not reverse.) 83 * 84 * @return 85 */ 86 public static String maximizeAndGetScript(Locale locale) { 87 return IMPL.maximizeAndGetScript(locale); 88 } 89 90 private ICUCompat() {} 91} 92