544 lines
23 KiB
Java
544 lines
23 KiB
Java
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.inputmethod.latin;
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import android.content.Context;
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import android.text.TextUtils;
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import android.util.Log;
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import com.android.inputmethod.annotations.UsedForTesting;
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import com.android.inputmethod.keyboard.ProximityInfo;
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import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
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import com.android.inputmethod.latin.personalization.PersonalizationDictionary;
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import com.android.inputmethod.latin.personalization.UserHistoryDictionary;
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import com.android.inputmethod.latin.utils.CollectionUtils;
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import com.android.inputmethod.latin.utils.ExecutorUtils;
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import com.android.inputmethod.latin.utils.LanguageModelParam;
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import com.android.inputmethod.latin.utils.SuggestionResults;
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import java.io.File;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.Locale;
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import java.util.Map;
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import java.util.Set;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.CountDownLatch;
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import java.util.concurrent.TimeUnit;
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// TODO: Consolidate dictionaries in native code.
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public class DictionaryFacilitatorForSuggest {
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public static final String TAG = DictionaryFacilitatorForSuggest.class.getSimpleName();
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// HACK: This threshold is being used when adding a capitalized entry in the User History
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// dictionary.
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private static final int CAPITALIZED_FORM_MAX_PROBABILITY_FOR_INSERT = 140;
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private Dictionaries mDictionaries = new Dictionaries();
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private boolean mIsUserDictEnabled = false;
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private volatile CountDownLatch mLatchForWaitingLoadingMainDictionary = new CountDownLatch(0);
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// To synchronize assigning mDictionaries to ensure closing dictionaries.
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private Object mLock = new Object();
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private static final String[] DICT_TYPES_ORDERED_TO_GET_SUGGESTION =
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new String[] {
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Dictionary.TYPE_MAIN,
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Dictionary.TYPE_USER_HISTORY,
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Dictionary.TYPE_PERSONALIZATION,
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Dictionary.TYPE_USER,
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Dictionary.TYPE_CONTACTS
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};
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private static final Map<String, Class<? extends ExpandableBinaryDictionary>>
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DICT_TYPE_TO_CLASS = CollectionUtils.newHashMap();
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static {
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DICT_TYPE_TO_CLASS.put(Dictionary.TYPE_USER_HISTORY, UserHistoryDictionary.class);
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DICT_TYPE_TO_CLASS.put(Dictionary.TYPE_PERSONALIZATION, PersonalizationDictionary.class);
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DICT_TYPE_TO_CLASS.put(Dictionary.TYPE_USER, UserBinaryDictionary.class);
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DICT_TYPE_TO_CLASS.put(Dictionary.TYPE_CONTACTS, ContactsBinaryDictionary.class);
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}
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private static final String DICT_FACTORY_METHOD_NAME = "getDictionary";
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private static final Class<?>[] DICT_FACTORY_METHOD_ARG_TYPES =
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new Class[] { Context.class, Locale.class, File.class };
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private static final String[] SUB_DICT_TYPES =
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Arrays.copyOfRange(DICT_TYPES_ORDERED_TO_GET_SUGGESTION, 1 /* start */,
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DICT_TYPES_ORDERED_TO_GET_SUGGESTION.length);
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/**
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* Class contains dictionaries for a locale.
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*/
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private static class Dictionaries {
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public final Locale mLocale;
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private Dictionary mMainDict;
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public final ConcurrentHashMap<String, ExpandableBinaryDictionary> mSubDictMap =
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CollectionUtils.newConcurrentHashMap();
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public Dictionaries() {
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mLocale = null;
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}
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public Dictionaries(final Locale locale, final Dictionary mainDict,
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final Map<String, ExpandableBinaryDictionary> subDicts) {
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mLocale = locale;
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// Main dictionary can be asynchronously loaded.
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setMainDict(mainDict);
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for (final Map.Entry<String, ExpandableBinaryDictionary> entry : subDicts.entrySet()) {
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setSubDict(entry.getKey(), entry.getValue());
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}
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}
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private void setSubDict(final String dictType, final ExpandableBinaryDictionary dict) {
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if (dict != null) {
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mSubDictMap.put(dictType, dict);
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}
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}
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public void setMainDict(final Dictionary mainDict) {
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// Close old dictionary if exists. Main dictionary can be assigned multiple times.
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final Dictionary oldDict = mMainDict;
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mMainDict = mainDict;
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if (oldDict != null && mainDict != oldDict) {
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oldDict.close();
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}
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}
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public Dictionary getDict(final String dictType) {
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if (Dictionary.TYPE_MAIN.equals(dictType)) {
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return mMainDict;
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} else {
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return getSubDict(dictType);
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}
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}
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public ExpandableBinaryDictionary getSubDict(final String dictType) {
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return mSubDictMap.get(dictType);
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}
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public boolean hasDict(final String dictType) {
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if (Dictionary.TYPE_MAIN.equals(dictType)) {
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return mMainDict != null;
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} else {
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return mSubDictMap.containsKey(dictType);
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}
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}
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public void closeDict(final String dictType) {
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final Dictionary dict;
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if (Dictionary.TYPE_MAIN.equals(dictType)) {
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dict = mMainDict;
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} else {
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dict = mSubDictMap.remove(dictType);
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}
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if (dict != null) {
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dict.close();
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}
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}
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}
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public interface DictionaryInitializationListener {
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public void onUpdateMainDictionaryAvailability(boolean isMainDictionaryAvailable);
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}
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public DictionaryFacilitatorForSuggest() {}
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public Locale getLocale() {
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return mDictionaries.mLocale;
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}
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private static ExpandableBinaryDictionary getSubDict(final String dictType,
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final Context context, final Locale locale, final File dictFile) {
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final Class<? extends ExpandableBinaryDictionary> dictClass =
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DICT_TYPE_TO_CLASS.get(dictType);
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if (dictClass == null) {
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return null;
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}
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try {
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final Method factoryMethod = dictClass.getMethod(DICT_FACTORY_METHOD_NAME,
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DICT_FACTORY_METHOD_ARG_TYPES);
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final Object dict = factoryMethod.invoke(null /* obj */,
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new Object[] { context, locale, dictFile });
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return (ExpandableBinaryDictionary) dict;
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} catch (final NoSuchMethodException | SecurityException | IllegalAccessException
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| IllegalArgumentException | InvocationTargetException e) {
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Log.e(TAG, "Cannot create dictionary: " + dictType, e);
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return null;
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}
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}
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public void resetDictionaries(final Context context, final Locale newLocale,
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final boolean useContactsDict, final boolean usePersonalizedDicts,
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final boolean forceReloadMainDictionary,
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final DictionaryInitializationListener listener) {
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final boolean localeHasBeenChanged = !newLocale.equals(mDictionaries.mLocale);
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// We always try to have the main dictionary. Other dictionaries can be unused.
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final boolean reloadMainDictionary = localeHasBeenChanged || forceReloadMainDictionary;
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// TODO: Make subDictTypesToUse configurable by resource or a static final list.
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final Set<String> subDictTypesToUse = CollectionUtils.newHashSet();
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if (useContactsDict) {
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subDictTypesToUse.add(Dictionary.TYPE_CONTACTS);
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}
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subDictTypesToUse.add(Dictionary.TYPE_USER);
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if (usePersonalizedDicts) {
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subDictTypesToUse.add(Dictionary.TYPE_USER_HISTORY);
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subDictTypesToUse.add(Dictionary.TYPE_PERSONALIZATION);
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}
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final Dictionary newMainDict;
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if (reloadMainDictionary) {
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// The main dictionary will be asynchronously loaded.
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newMainDict = null;
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} else {
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newMainDict = mDictionaries.getDict(Dictionary.TYPE_MAIN);
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}
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final Map<String, ExpandableBinaryDictionary> subDicts = CollectionUtils.newHashMap();
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for (final String dictType : SUB_DICT_TYPES) {
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if (!subDictTypesToUse.contains(dictType)) {
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// This dictionary will not be used.
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continue;
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}
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final ExpandableBinaryDictionary dict;
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if (!localeHasBeenChanged && mDictionaries.hasDict(dictType)) {
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// Continue to use current dictionary.
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dict = mDictionaries.getSubDict(dictType);
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} else {
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// Start to use new dictionary.
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dict = getSubDict(dictType, context, newLocale, null /* dictFile */);
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}
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subDicts.put(dictType, dict);
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}
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// Replace Dictionaries.
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final Dictionaries newDictionaries = new Dictionaries(newLocale, newMainDict, subDicts);
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final Dictionaries oldDictionaries;
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synchronized (mLock) {
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oldDictionaries = mDictionaries;
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mDictionaries = newDictionaries;
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mIsUserDictEnabled = UserBinaryDictionary.isEnabled(context);
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if (reloadMainDictionary) {
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asyncReloadMainDictionary(context, newLocale, listener);
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}
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}
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if (listener != null) {
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listener.onUpdateMainDictionaryAvailability(hasInitializedMainDictionary());
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}
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// Clean up old dictionaries.
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if (reloadMainDictionary) {
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oldDictionaries.closeDict(Dictionary.TYPE_MAIN);
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}
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for (final String dictType : SUB_DICT_TYPES) {
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if (localeHasBeenChanged || !subDictTypesToUse.contains(dictType)) {
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oldDictionaries.closeDict(dictType);
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}
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}
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oldDictionaries.mSubDictMap.clear();
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}
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private void asyncReloadMainDictionary(final Context context, final Locale locale,
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final DictionaryInitializationListener listener) {
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final CountDownLatch latchForWaitingLoadingMainDictionary = new CountDownLatch(1);
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mLatchForWaitingLoadingMainDictionary = latchForWaitingLoadingMainDictionary;
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ExecutorUtils.getExecutor("InitializeBinaryDictionary").execute(new Runnable() {
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@Override
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public void run() {
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final Dictionary mainDict =
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DictionaryFactory.createMainDictionaryFromManager(context, locale);
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synchronized (mLock) {
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if (locale.equals(mDictionaries.mLocale)) {
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mDictionaries.setMainDict(mainDict);
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} else {
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// Dictionary facilitator has been reset for another locale.
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mainDict.close();
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}
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}
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if (listener != null) {
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listener.onUpdateMainDictionaryAvailability(hasInitializedMainDictionary());
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}
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latchForWaitingLoadingMainDictionary.countDown();
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}
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});
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}
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@UsedForTesting
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public void resetDictionariesForTesting(final Context context, final Locale locale,
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final ArrayList<String> dictionaryTypes, final HashMap<String, File> dictionaryFiles,
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final Map<String, Map<String, String>> additionalDictAttributes) {
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Dictionary mainDictionary = null;
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final Map<String, ExpandableBinaryDictionary> subDicts = CollectionUtils.newHashMap();
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for (final String dictType : dictionaryTypes) {
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if (dictType.equals(Dictionary.TYPE_MAIN)) {
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mainDictionary = DictionaryFactory.createMainDictionaryFromManager(context, locale);
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} else {
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final File dictFile = dictionaryFiles.get(dictType);
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final ExpandableBinaryDictionary dict = getSubDict(
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dictType, context, locale, dictFile);
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if (additionalDictAttributes.containsKey(dictType)) {
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dict.clearAndFlushDictionaryWithAdditionalAttributes(
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additionalDictAttributes.get(dictType));
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}
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if (dict == null) {
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throw new RuntimeException("Unknown dictionary type: " + dictType);
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}
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dict.reloadDictionaryIfRequired();
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dict.waitAllTasksForTests();
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subDicts.put(dictType, dict);
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}
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}
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mDictionaries = new Dictionaries(locale, mainDictionary, subDicts);
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}
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public void closeDictionaries() {
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final Dictionaries dictionaries;
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synchronized (mLock) {
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dictionaries = mDictionaries;
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mDictionaries = new Dictionaries();
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}
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for (final String dictType : DICT_TYPES_ORDERED_TO_GET_SUGGESTION) {
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dictionaries.closeDict(dictType);
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}
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}
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// The main dictionary could have been loaded asynchronously. Don't cache the return value
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// of this method.
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public boolean hasInitializedMainDictionary() {
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final Dictionary mainDict = mDictionaries.getDict(Dictionary.TYPE_MAIN);
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return mainDict != null && mainDict.isInitialized();
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}
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public boolean hasPersonalizationDictionary() {
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return mDictionaries.hasDict(Dictionary.TYPE_PERSONALIZATION);
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}
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public void flushPersonalizationDictionary() {
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final ExpandableBinaryDictionary personalizationDict =
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mDictionaries.getSubDict(Dictionary.TYPE_PERSONALIZATION);
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if (personalizationDict != null) {
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personalizationDict.asyncFlushBinaryDictionary();
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}
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}
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public void waitForLoadingMainDictionary(final long timeout, final TimeUnit unit)
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throws InterruptedException {
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mLatchForWaitingLoadingMainDictionary.await(timeout, unit);
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}
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@UsedForTesting
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public void waitForLoadingDictionariesForTesting(final long timeout, final TimeUnit unit)
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throws InterruptedException {
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waitForLoadingMainDictionary(timeout, unit);
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final Map<String, ExpandableBinaryDictionary> dictMap = mDictionaries.mSubDictMap;
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for (final ExpandableBinaryDictionary dict : dictMap.values()) {
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dict.waitAllTasksForTests();
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}
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}
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public boolean isUserDictionaryEnabled() {
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return mIsUserDictEnabled;
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}
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public void addWordToUserDictionary(final Context context, final String word) {
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final Locale locale = getLocale();
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if (locale == null) {
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return;
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}
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UserBinaryDictionary.addWordToUserDictionary(context, locale, word);
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}
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public void addToUserHistory(final String suggestion, final boolean wasAutoCapitalized,
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final String previousWord, final int timeStampInSeconds) {
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final Dictionaries dictionaries = mDictionaries;
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final ExpandableBinaryDictionary userHistoryDictionary =
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dictionaries.getSubDict(Dictionary.TYPE_USER_HISTORY);
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if (userHistoryDictionary == null) {
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return;
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}
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final int maxFreq = getMaxFrequency(suggestion);
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if (maxFreq == 0) {
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return;
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}
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final String suggestionLowerCase = suggestion.toLowerCase(dictionaries.mLocale);
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final String secondWord;
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if (wasAutoCapitalized) {
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if (isValidWord(suggestion, false /* ignoreCase */)
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&& !isValidWord(suggestionLowerCase, false /* ignoreCase */)) {
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// If the word was auto-capitalized and exists only as a capitalized word in the
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// dictionary, then we must not downcase it before registering it. For example,
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// the name of the contacts in start-of-sentence position would come here with the
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// wasAutoCapitalized flag: if we downcase it, we'd register a lower-case version
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// of that contact's name which would end up popping in suggestions.
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secondWord = suggestion;
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} else {
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// If however the word is not in the dictionary, or exists as a lower-case word
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// only, then we consider that was a lower-case word that had been auto-capitalized.
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secondWord = suggestionLowerCase;
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}
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} else {
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// HACK: We'd like to avoid adding the capitalized form of common words to the User
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// History dictionary in order to avoid suggesting them until the dictionary
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// consolidation is done.
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// TODO: Remove this hack when ready.
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final int lowerCaseFreqInMainDict = dictionaries.hasDict(Dictionary.TYPE_MAIN) ?
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dictionaries.getDict(Dictionary.TYPE_MAIN).getFrequency(suggestionLowerCase) :
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Dictionary.NOT_A_PROBABILITY;
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if (maxFreq < lowerCaseFreqInMainDict
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&& lowerCaseFreqInMainDict >= CAPITALIZED_FORM_MAX_PROBABILITY_FOR_INSERT) {
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// Use lower cased word as the word can be a distracter of the popular word.
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secondWord = suggestionLowerCase;
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} else {
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secondWord = suggestion;
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}
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}
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// We demote unrecognized words (frequency < 0, below) by specifying them as "invalid".
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// We don't add words with 0-frequency (assuming they would be profanity etc.).
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final boolean isValid = maxFreq > 0;
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UserHistoryDictionary.addToDictionary(userHistoryDictionary, previousWord, secondWord,
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isValid, timeStampInSeconds);
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}
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public void cancelAddingUserHistory(final String previousWord, final String committedWord) {
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final ExpandableBinaryDictionary userHistoryDictionary =
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mDictionaries.getSubDict(Dictionary.TYPE_USER_HISTORY);
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if (userHistoryDictionary != null) {
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userHistoryDictionary.removeBigramDynamically(previousWord, committedWord);
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}
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}
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// TODO: Revise the way to fusion suggestion results.
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public SuggestionResults getSuggestionResults(final WordComposer composer,
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final String prevWord, final ProximityInfo proximityInfo,
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final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
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final int sessionId, final ArrayList<SuggestedWordInfo> rawSuggestions) {
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final Dictionaries dictionaries = mDictionaries;
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final SuggestionResults suggestionResults =
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new SuggestionResults(dictionaries.mLocale, SuggestedWords.MAX_SUGGESTIONS);
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final float[] languageWeight = new float[] { Dictionary.NOT_A_LANGUAGE_WEIGHT };
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for (final String dictType : DICT_TYPES_ORDERED_TO_GET_SUGGESTION) {
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final Dictionary dictionary = dictionaries.getDict(dictType);
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if (null == dictionary) continue;
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final ArrayList<SuggestedWordInfo> dictionarySuggestions =
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dictionary.getSuggestionsWithSessionId(composer, prevWord, proximityInfo,
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blockOffensiveWords, additionalFeaturesOptions, sessionId,
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languageWeight);
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if (null == dictionarySuggestions) continue;
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suggestionResults.addAll(dictionarySuggestions);
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if (null != rawSuggestions) {
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rawSuggestions.addAll(dictionarySuggestions);
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}
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}
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return suggestionResults;
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}
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public boolean isValidMainDictWord(final String word) {
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final Dictionary mainDict = mDictionaries.getDict(Dictionary.TYPE_MAIN);
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if (TextUtils.isEmpty(word) || mainDict == null) {
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return false;
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}
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return mainDict.isValidWord(word);
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}
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public boolean isValidWord(final String word, final boolean ignoreCase) {
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if (TextUtils.isEmpty(word)) {
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return false;
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}
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final Dictionaries dictionaries = mDictionaries;
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if (dictionaries.mLocale == null) {
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return false;
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}
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final String lowerCasedWord = word.toLowerCase(dictionaries.mLocale);
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for (final String dictType : DICT_TYPES_ORDERED_TO_GET_SUGGESTION) {
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final Dictionary dictionary = dictionaries.getDict(dictType);
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// Ideally the passed map would come out of a {@link java.util.concurrent.Future} and
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// would be immutable once it's finished initializing, but concretely a null test is
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// probably good enough for the time being.
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if (null == dictionary) continue;
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if (dictionary.isValidWord(word)
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|| (ignoreCase && dictionary.isValidWord(lowerCasedWord))) {
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return true;
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}
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}
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return false;
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}
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private int getMaxFrequency(final String word) {
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if (TextUtils.isEmpty(word)) {
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return Dictionary.NOT_A_PROBABILITY;
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}
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int maxFreq = -1;
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final Dictionaries dictionaries = mDictionaries;
|
|
for (final String dictType : DICT_TYPES_ORDERED_TO_GET_SUGGESTION) {
|
|
final Dictionary dictionary = dictionaries.getDict(dictType);
|
|
if (dictionary == null) continue;
|
|
final int tempFreq = dictionary.getFrequency(word);
|
|
if (tempFreq >= maxFreq) {
|
|
maxFreq = tempFreq;
|
|
}
|
|
}
|
|
return maxFreq;
|
|
}
|
|
|
|
public void clearUserHistoryDictionary() {
|
|
final ExpandableBinaryDictionary userHistoryDict =
|
|
mDictionaries.getSubDict(Dictionary.TYPE_USER_HISTORY);
|
|
if (userHistoryDict == null) {
|
|
return;
|
|
}
|
|
userHistoryDict.clear();
|
|
}
|
|
|
|
// This method gets called only when the IME receives a notification to remove the
|
|
// personalization dictionary.
|
|
public void clearPersonalizationDictionary() {
|
|
final ExpandableBinaryDictionary personalizationDict =
|
|
mDictionaries.getSubDict(Dictionary.TYPE_PERSONALIZATION);
|
|
if (personalizationDict == null) {
|
|
return;
|
|
}
|
|
personalizationDict.clear();
|
|
}
|
|
|
|
public void addMultipleDictionaryEntriesToPersonalizationDictionary(
|
|
final ArrayList<LanguageModelParam> languageModelParams,
|
|
final ExpandableBinaryDictionary.AddMultipleDictionaryEntriesCallback callback) {
|
|
final ExpandableBinaryDictionary personalizationDict =
|
|
mDictionaries.getSubDict(Dictionary.TYPE_PERSONALIZATION);
|
|
if (personalizationDict == null || languageModelParams == null
|
|
|| languageModelParams.isEmpty()) {
|
|
if (callback != null) {
|
|
callback.onFinished();
|
|
}
|
|
return;
|
|
}
|
|
personalizationDict.addMultipleDictionaryEntriesDynamically(languageModelParams, callback);
|
|
}
|
|
|
|
public void dumpDictionaryForDebug(final String dictName) {
|
|
final ExpandableBinaryDictionary dictToDump = mDictionaries.getSubDict(dictName);
|
|
if (dictToDump == null) {
|
|
Log.e(TAG, "Cannot dump " + dictName + ". "
|
|
+ "The dictionary is not being used for suggestion or cannot be dumped.");
|
|
return;
|
|
}
|
|
dictToDump.dumpAllWordsForDebug();
|
|
}
|
|
}
|