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/*
* Copyright (C) 2013 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 com.android.inputmethod.latin.personalization;
import android.content.Context;
import com.android.inputmethod.annotations.ExternallyReferenced;
import com.android.inputmethod.latin.Dictionary;
import com.android.inputmethod.latin.ExpandableBinaryDictionary;
import com.android.inputmethod.latin.NgramContext;
import com.android.inputmethod.latin.common.Constants;
import com.android.inputmethod.latin.utils.DistracterFilter;
import java.io.File;
import java.util.Locale;
import javax.annotation.Nonnull;
/**
* Locally gathers stats about the words user types and various other signals like auto-correction
* cancellation or manual picks. This allows the keyboard to adapt to the typist over time.
*/
public class UserHistoryDictionary extends DecayingExpandableBinaryDictionaryBase {
/* package */ static final String NAME = UserHistoryDictionary.class.getSimpleName();
// TODO: Make this constructor private
/* package */ UserHistoryDictionary(final Context context, final Locale locale) {
super(context, getDictName(NAME, locale, null /* dictFile */), locale,
Dictionary.TYPE_USER_HISTORY, null /* dictFile */);
}
// Note: This method is called by {@link DictionaryFacilitator} using Java reflection.
@SuppressWarnings("unused")
@ExternallyReferenced
public static UserHistoryDictionary getDictionary(final Context context, final Locale locale,
final File dictFile, final String dictNamePrefix) {
return PersonalizationHelper.getUserHistoryDictionary(context, locale);
}
/**
* Add a word to the user history dictionary.
*
* @param userHistoryDictionary the user history dictionary
* @param ngramContext the n-gram context
* @param word the word the user inputted
* @param isValid whether the word is valid or not
* @param timestamp the timestamp when the word has been inputted
* @param distracterFilter the filter to check whether the word is a distracter
*/
public static void addToDictionary(final ExpandableBinaryDictionary userHistoryDictionary,
@Nonnull final NgramContext ngramContext, final String word, final boolean isValid,
final int timestamp, @Nonnull final DistracterFilter distracterFilter) {
if (word.length() > Constants.DICTIONARY_MAX_WORD_LENGTH) {
return;
}
userHistoryDictionary.updateEntriesForWordWithCheckingDistracter(ngramContext, word,
isValid, 1 /* count */, timestamp, distracterFilter);
}
}
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