1 /* 2 * Copyright (C) 2006 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 17 package android.text.method; 18 19 import android.annotation.NonNull; 20 import android.annotation.Nullable; 21 import android.text.InputType; 22 import android.view.KeyEvent; 23 24 import com.android.internal.annotations.GuardedBy; 25 import com.android.internal.util.ArrayUtils; 26 27 import java.util.HashMap; 28 import java.util.LinkedHashSet; 29 import java.util.Locale; 30 31 /** 32 * For entering dates in a text field. 33 * <p></p> 34 * As for all implementations of {@link KeyListener}, this class is only concerned 35 * with hardware keyboards. Software input methods have no obligation to trigger 36 * the methods in this class. 37 */ 38 @android.ravenwood.annotation.RavenwoodKeepWholeClass 39 public class DateKeyListener extends NumberKeyListener 40 { getInputType()41 public int getInputType() { 42 if (mNeedsAdvancedInput) { 43 return InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_NORMAL; 44 } else { 45 return InputType.TYPE_CLASS_DATETIME | InputType.TYPE_DATETIME_VARIATION_DATE; 46 } 47 } 48 49 @Override 50 @NonNull getAcceptedChars()51 protected char[] getAcceptedChars() { 52 return mCharacters; 53 } 54 55 /** 56 * @deprecated Use {@link #DateKeyListener(Locale)} instead. 57 */ 58 @Deprecated DateKeyListener()59 public DateKeyListener() { 60 this(null); 61 } 62 63 private static final String SYMBOLS_TO_IGNORE = "yMLd"; 64 private static final String[] SKELETONS = {"yMd", "yM", "Md"}; 65 DateKeyListener(@ullable Locale locale)66 public DateKeyListener(@Nullable Locale locale) { 67 final LinkedHashSet<Character> chars = new LinkedHashSet<>(); 68 // First add the digits, then add all the non-pattern characters seen in the pattern for 69 // "yMd", which is supposed to only have numerical fields. 70 final boolean success = NumberKeyListener.addDigits(chars, locale) 71 && NumberKeyListener.addFormatCharsFromSkeletons( 72 chars, locale, SKELETONS, SYMBOLS_TO_IGNORE); 73 if (success) { 74 mCharacters = NumberKeyListener.collectionToArray(chars); 75 mNeedsAdvancedInput = !ArrayUtils.containsAll(CHARACTERS, mCharacters); 76 } else { 77 mCharacters = CHARACTERS; 78 mNeedsAdvancedInput = false; 79 } 80 } 81 82 /** 83 * @deprecated Use {@link #getInstance(Locale)} instead. 84 */ 85 @Deprecated 86 @NonNull getInstance()87 public static DateKeyListener getInstance() { 88 return getInstance(null); 89 } 90 91 /** 92 * Returns an instance of DateKeyListener appropriate for the given locale. 93 */ 94 @NonNull getInstance(@ullable Locale locale)95 public static DateKeyListener getInstance(@Nullable Locale locale) { 96 DateKeyListener instance; 97 synchronized (sLock) { 98 instance = sInstanceCache.get(locale); 99 if (instance == null) { 100 instance = new DateKeyListener(locale); 101 sInstanceCache.put(locale, instance); 102 } 103 } 104 return instance; 105 } 106 107 /** 108 * This field used to list the characters that were used. But is now a fixed data 109 * field that is the list of code units used for the deprecated case where the class 110 * is instantiated with null or no input parameter. 111 * 112 * @see KeyEvent#getMatch 113 * @see #getAcceptedChars 114 * 115 * @deprecated Use {@link #getAcceptedChars()} instead. 116 */ 117 @Deprecated 118 public static final char[] CHARACTERS = new char[] { 119 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 120 '/', '-', '.' 121 }; 122 123 private final char[] mCharacters; 124 private final boolean mNeedsAdvancedInput; 125 126 private static final Object sLock = new Object(); 127 @GuardedBy("sLock") 128 private static final HashMap<Locale, DateKeyListener> sInstanceCache = new HashMap<>(); 129 } 130