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/*
* Copyright (C) 2006 The Android Open Source Project
*
* 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 android.text.method;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.text.InputType;
import android.view.KeyEvent;
import com.android.internal.annotations.GuardedBy;
import com.android.internal.util.ArrayUtils;
import java.util.HashMap;
import java.util.LinkedHashSet;
import java.util.Locale;
/**
* For entering times in a text field.
* <p></p>
* As for all implementations of {@link KeyListener}, this class is only concerned
* with hardware keyboards. Software input methods have no obligation to trigger
* the methods in this class.
*/
public class TimeKeyListener extends NumberKeyListener
{
public int getInputType() {
if (mNeedsAdvancedInput) {
return InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_NORMAL;
} else {
return InputType.TYPE_CLASS_DATETIME | InputType.TYPE_DATETIME_VARIATION_TIME;
}
}
@Override
@NonNull
protected char[] getAcceptedChars()
{
return mCharacters;
}
/**
* @deprecated Use {@link #TimeKeyListener(Locale)} instead.
*/
@Deprecated
public TimeKeyListener() {
this(null);
}
private static final String SYMBOLS_TO_IGNORE = "ahHKkms";
private static final String SKELETON_12HOUR = "hms";
private static final String SKELETON_24HOUR = "Hms";
public TimeKeyListener(@Nullable Locale locale) {
final LinkedHashSet<Character> chars = new LinkedHashSet<>();
// First add the digits. Then, add all the character in AM and PM markers. Finally, add all
// the non-pattern characters seen in the patterns for "hms" and "Hms".
final boolean success = NumberKeyListener.addDigits(chars, locale)
&& NumberKeyListener.addAmPmChars(chars, locale)
&& NumberKeyListener.addFormatCharsFromSkeleton(
chars, locale, SKELETON_12HOUR, SYMBOLS_TO_IGNORE)
&& NumberKeyListener.addFormatCharsFromSkeleton(
chars, locale, SKELETON_24HOUR, SYMBOLS_TO_IGNORE);
if (success) {
mCharacters = NumberKeyListener.collectionToArray(chars);
if (locale != null && "en".equals(locale.getLanguage())) {
// For backward compatibility reasons, assume we don't need advanced input for
// English locales, although English locales may need uppercase letters for
// AM and PM.
mNeedsAdvancedInput = false;
} else {
mNeedsAdvancedInput = !ArrayUtils.containsAll(CHARACTERS, mCharacters);
}
} else {
mCharacters = CHARACTERS;
mNeedsAdvancedInput = false;
}
}
/**
* @deprecated Use {@link #getInstance(Locale)} instead.
*/
@Deprecated
@NonNull
public static TimeKeyListener getInstance() {
return getInstance(null);
}
/**
* Returns an instance of TimeKeyListener appropriate for the given locale.
*/
@NonNull
public static TimeKeyListener getInstance(@Nullable Locale locale) {
TimeKeyListener instance;
synchronized (sLock) {
instance = sInstanceCache.get(locale);
if (instance == null) {
instance = new TimeKeyListener(locale);
sInstanceCache.put(locale, instance);
}
}
return instance;
}
/**
* This field used to list the characters that were used. But is now a fixed data
* field that is the list of code units used for the deprecated case where the class
* is instantiated with null or no input parameter.
*
* @see KeyEvent#getMatch
* @see #getAcceptedChars
*
* @deprecated Use {@link #getAcceptedChars()} instead.
*/
public static final char[] CHARACTERS = new char[] {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'm',
'p', ':'
};
private final char[] mCharacters;
private final boolean mNeedsAdvancedInput;
private static final Object sLock = new Object();
@GuardedBy("sLock")
private static final HashMap<Locale, TimeKeyListener> sInstanceCache = new HashMap<>();
}
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