448 lines
18 KiB
Java
448 lines
18 KiB
Java
/*
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* Copyright (C) 2010 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.text.TextUtils;
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import android.view.inputmethod.CompletionInfo;
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import com.android.inputmethod.annotations.UsedForTesting;
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import com.android.inputmethod.latin.common.StringUtils;
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import com.android.inputmethod.latin.define.DebugFlags;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.HashSet;
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import javax.annotation.Nonnull;
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import javax.annotation.Nullable;
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public class SuggestedWords {
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public static final int INDEX_OF_TYPED_WORD = 0;
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public static final int INDEX_OF_AUTO_CORRECTION = 1;
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public static final int NOT_A_SEQUENCE_NUMBER = -1;
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public static final int INPUT_STYLE_NONE = 0;
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public static final int INPUT_STYLE_TYPING = 1;
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public static final int INPUT_STYLE_UPDATE_BATCH = 2;
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public static final int INPUT_STYLE_TAIL_BATCH = 3;
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public static final int INPUT_STYLE_APPLICATION_SPECIFIED = 4;
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public static final int INPUT_STYLE_RECORRECTION = 5;
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public static final int INPUT_STYLE_PREDICTION = 6;
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public static final int INPUT_STYLE_BEGINNING_OF_SENTENCE_PREDICTION = 7;
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// The maximum number of suggestions available.
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public static final int MAX_SUGGESTIONS = 18;
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private static final ArrayList<SuggestedWordInfo> EMPTY_WORD_INFO_LIST = new ArrayList<>(0);
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@Nonnull
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private static final SuggestedWords EMPTY = new SuggestedWords(
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EMPTY_WORD_INFO_LIST, null /* rawSuggestions */, null /* typedWord */,
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false /* typedWordValid */, false /* willAutoCorrect */,
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false /* isObsoleteSuggestions */, INPUT_STYLE_NONE, NOT_A_SEQUENCE_NUMBER);
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@Nullable
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public final SuggestedWordInfo mTypedWordInfo;
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public final boolean mTypedWordValid;
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// Note: this INCLUDES cases where the word will auto-correct to itself. A good definition
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// of what this flag means would be "the top suggestion is strong enough to auto-correct",
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// whether this exactly matches the user entry or not.
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public final boolean mWillAutoCorrect;
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public final boolean mIsObsoleteSuggestions;
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// How the input for these suggested words was done by the user. Must be one of the
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// INPUT_STYLE_* constants above.
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public final int mInputStyle;
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public final int mSequenceNumber; // Sequence number for auto-commit.
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@Nonnull
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protected final ArrayList<SuggestedWordInfo> mSuggestedWordInfoList;
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@Nullable
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public final ArrayList<SuggestedWordInfo> mRawSuggestions;
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public SuggestedWords(@Nonnull final ArrayList<SuggestedWordInfo> suggestedWordInfoList,
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@Nullable final ArrayList<SuggestedWordInfo> rawSuggestions,
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@Nullable final SuggestedWordInfo typedWordInfo,
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final boolean typedWordValid,
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final boolean willAutoCorrect,
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final boolean isObsoleteSuggestions,
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final int inputStyle,
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final int sequenceNumber) {
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mSuggestedWordInfoList = suggestedWordInfoList;
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mRawSuggestions = rawSuggestions;
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mTypedWordValid = typedWordValid;
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mWillAutoCorrect = willAutoCorrect;
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mIsObsoleteSuggestions = isObsoleteSuggestions;
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mInputStyle = inputStyle;
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mSequenceNumber = sequenceNumber;
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mTypedWordInfo = typedWordInfo;
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}
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public boolean isEmpty() {
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return mSuggestedWordInfoList.isEmpty();
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}
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public int size() {
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return mSuggestedWordInfoList.size();
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}
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/**
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* Get suggested word to show as suggestions to UI.
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*
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* @param shouldShowLxxSuggestionUi true if showing suggestion UI introduced in LXX and later.
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* @return the count of suggested word to show as suggestions to UI.
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*/
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public int getWordCountToShow(final boolean shouldShowLxxSuggestionUi) {
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if (isPrediction() || !shouldShowLxxSuggestionUi) {
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return size();
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}
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return size() - /* typed word */ 1;
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}
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/**
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* Get {@link SuggestedWordInfo} object for the typed word.
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* @return The {@link SuggestedWordInfo} object for the typed word.
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*/
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public SuggestedWordInfo getTypedWordInfo() {
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return mTypedWordInfo;
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}
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/**
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* Get suggested word at <code>index</code>.
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* @param index The index of the suggested word.
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* @return The suggested word.
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*/
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public String getWord(final int index) {
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return mSuggestedWordInfoList.get(index).mWord;
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}
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/**
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* Get displayed text at <code>index</code>.
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* In RTL languages, the displayed text on the suggestion strip may be different from the
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* suggested word that is returned from {@link #getWord(int)}. For example the displayed text
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* of punctuation suggestion "(" should be ")".
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* @param index The index of the text to display.
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* @return The text to be displayed.
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*/
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public String getLabel(final int index) {
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return mSuggestedWordInfoList.get(index).mWord;
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}
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/**
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* Get {@link SuggestedWordInfo} object at <code>index</code>.
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* @param index The index of the {@link SuggestedWordInfo}.
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* @return The {@link SuggestedWordInfo} object.
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*/
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public SuggestedWordInfo getInfo(final int index) {
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return mSuggestedWordInfoList.get(index);
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}
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/**
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* Gets the suggestion index from the suggestions list.
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* @param suggestedWordInfo The {@link SuggestedWordInfo} to find the index.
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* @return The position of the suggestion in the suggestion list.
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*/
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public int indexOf(SuggestedWordInfo suggestedWordInfo) {
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return mSuggestedWordInfoList.indexOf(suggestedWordInfo);
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}
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public String getDebugString(final int pos) {
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if (!DebugFlags.DEBUG_ENABLED) {
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return null;
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}
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final SuggestedWordInfo wordInfo = getInfo(pos);
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if (wordInfo == null) {
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return null;
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}
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final String debugString = wordInfo.getDebugString();
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if (TextUtils.isEmpty(debugString)) {
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return null;
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}
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return debugString;
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}
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/**
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* The predicator to tell whether this object represents punctuation suggestions.
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* @return false if this object desn't represent punctuation suggestions.
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*/
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public boolean isPunctuationSuggestions() {
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return false;
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}
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@Override
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public String toString() {
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// Pretty-print method to help debug
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return "SuggestedWords:"
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+ " mTypedWordValid=" + mTypedWordValid
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+ " mWillAutoCorrect=" + mWillAutoCorrect
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+ " mInputStyle=" + mInputStyle
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+ " words=" + Arrays.toString(mSuggestedWordInfoList.toArray());
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}
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public static ArrayList<SuggestedWordInfo> getFromApplicationSpecifiedCompletions(
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final CompletionInfo[] infos) {
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final ArrayList<SuggestedWordInfo> result = new ArrayList<>();
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for (final CompletionInfo info : infos) {
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if (null == info || null == info.getText()) {
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continue;
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}
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result.add(new SuggestedWordInfo(info));
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}
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return result;
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}
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@Nonnull
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public static final SuggestedWords getEmptyInstance() {
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return SuggestedWords.EMPTY;
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}
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// Should get rid of the first one (what the user typed previously) from suggestions
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// and replace it with what the user currently typed.
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public static ArrayList<SuggestedWordInfo> getTypedWordAndPreviousSuggestions(
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@Nonnull final SuggestedWordInfo typedWordInfo,
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@Nonnull final SuggestedWords previousSuggestions) {
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final ArrayList<SuggestedWordInfo> suggestionsList = new ArrayList<>();
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final HashSet<String> alreadySeen = new HashSet<>();
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suggestionsList.add(typedWordInfo);
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alreadySeen.add(typedWordInfo.mWord);
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final int previousSize = previousSuggestions.size();
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for (int index = 1; index < previousSize; index++) {
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final SuggestedWordInfo prevWordInfo = previousSuggestions.getInfo(index);
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final String prevWord = prevWordInfo.mWord;
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// Filter out duplicate suggestions.
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if (!alreadySeen.contains(prevWord)) {
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suggestionsList.add(prevWordInfo);
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alreadySeen.add(prevWord);
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}
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}
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return suggestionsList;
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}
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public SuggestedWordInfo getAutoCommitCandidate() {
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if (mSuggestedWordInfoList.size() <= 0) return null;
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final SuggestedWordInfo candidate = mSuggestedWordInfoList.get(0);
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return candidate.isEligibleForAutoCommit() ? candidate : null;
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}
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// non-final for testability.
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public static class SuggestedWordInfo {
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public static final int NOT_AN_INDEX = -1;
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public static final int NOT_A_CONFIDENCE = -1;
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public static final int MAX_SCORE = Integer.MAX_VALUE;
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private static final int KIND_MASK_KIND = 0xFF; // Mask to get only the kind
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public static final int KIND_TYPED = 0; // What user typed
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public static final int KIND_CORRECTION = 1; // Simple correction/suggestion
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public static final int KIND_COMPLETION = 2; // Completion (suggestion with appended chars)
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public static final int KIND_WHITELIST = 3; // Whitelisted word
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public static final int KIND_BLACKLIST = 4; // Blacklisted word
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public static final int KIND_HARDCODED = 5; // Hardcoded suggestion, e.g. punctuation
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public static final int KIND_APP_DEFINED = 6; // Suggested by the application
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public static final int KIND_SHORTCUT = 7; // A shortcut
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public static final int KIND_PREDICTION = 8; // A prediction (== a suggestion with no input)
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// KIND_RESUMED: A resumed suggestion (comes from a span, currently this type is used only
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// in java for re-correction)
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public static final int KIND_RESUMED = 9;
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public static final int KIND_OOV_CORRECTION = 10; // Most probable string correction
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public static final int KIND_FLAG_POSSIBLY_OFFENSIVE = 0x80000000;
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public static final int KIND_FLAG_EXACT_MATCH = 0x40000000;
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public static final int KIND_FLAG_EXACT_MATCH_WITH_INTENTIONAL_OMISSION = 0x20000000;
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public static final int KIND_FLAG_APPROPRIATE_FOR_AUTO_CORRECTION = 0x10000000;
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public final String mWord;
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public final String mPrevWordsContext;
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// The completion info from the application. Null for suggestions that don't come from
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// the application (including keyboard-computed ones, so this is almost always null)
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public final CompletionInfo mApplicationSpecifiedCompletionInfo;
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public final int mScore;
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public final int mKindAndFlags;
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public final int mCodePointCount;
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@Deprecated
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public final Dictionary mSourceDict;
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// For auto-commit. This keeps track of the index inside the touch coordinates array
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// passed to native code to get suggestions for a gesture that corresponds to the first
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// letter of the second word.
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public final int mIndexOfTouchPointOfSecondWord;
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// For auto-commit. This is a measure of how confident we are that we can commit the
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// first word of this suggestion.
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public final int mAutoCommitFirstWordConfidence;
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private String mDebugString = "";
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/**
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* Create a new suggested word info.
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* @param word The string to suggest.
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* @param prevWordsContext previous words context.
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* @param score A measure of how likely this suggestion is.
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* @param kindAndFlags The kind of suggestion, as one of the above KIND_* constants with
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* flags.
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* @param sourceDict What instance of Dictionary produced this suggestion.
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* @param indexOfTouchPointOfSecondWord See mIndexOfTouchPointOfSecondWord.
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* @param autoCommitFirstWordConfidence See mAutoCommitFirstWordConfidence.
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*/
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public SuggestedWordInfo(final String word, final String prevWordsContext,
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final int score, final int kindAndFlags,
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final Dictionary sourceDict, final int indexOfTouchPointOfSecondWord,
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final int autoCommitFirstWordConfidence) {
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mWord = word;
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mPrevWordsContext = prevWordsContext;
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mApplicationSpecifiedCompletionInfo = null;
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mScore = score;
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mKindAndFlags = kindAndFlags;
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mSourceDict = sourceDict;
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mCodePointCount = StringUtils.codePointCount(mWord);
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mIndexOfTouchPointOfSecondWord = indexOfTouchPointOfSecondWord;
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mAutoCommitFirstWordConfidence = autoCommitFirstWordConfidence;
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}
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/**
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* Create a new suggested word info from an application-specified completion.
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* If the passed argument or its contained text is null, this throws a NPE.
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* @param applicationSpecifiedCompletion The application-specified completion info.
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*/
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public SuggestedWordInfo(final CompletionInfo applicationSpecifiedCompletion) {
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mWord = applicationSpecifiedCompletion.getText().toString();
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mPrevWordsContext = "";
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mApplicationSpecifiedCompletionInfo = applicationSpecifiedCompletion;
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mScore = SuggestedWordInfo.MAX_SCORE;
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mKindAndFlags = SuggestedWordInfo.KIND_APP_DEFINED;
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mSourceDict = Dictionary.DICTIONARY_APPLICATION_DEFINED;
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mCodePointCount = StringUtils.codePointCount(mWord);
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mIndexOfTouchPointOfSecondWord = SuggestedWordInfo.NOT_AN_INDEX;
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mAutoCommitFirstWordConfidence = SuggestedWordInfo.NOT_A_CONFIDENCE;
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}
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public boolean isEligibleForAutoCommit() {
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return (isKindOf(KIND_CORRECTION) && NOT_AN_INDEX != mIndexOfTouchPointOfSecondWord);
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}
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public int getKind() {
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return (mKindAndFlags & KIND_MASK_KIND);
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}
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public boolean isKindOf(final int kind) {
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return getKind() == kind;
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}
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public boolean isPossiblyOffensive() {
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return (mKindAndFlags & KIND_FLAG_POSSIBLY_OFFENSIVE) != 0;
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}
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public boolean isExactMatch() {
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return (mKindAndFlags & KIND_FLAG_EXACT_MATCH) != 0;
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}
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public boolean isExactMatchWithIntentionalOmission() {
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return (mKindAndFlags & KIND_FLAG_EXACT_MATCH_WITH_INTENTIONAL_OMISSION) != 0;
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}
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public boolean isAprapreateForAutoCorrection() {
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return (mKindAndFlags & KIND_FLAG_APPROPRIATE_FOR_AUTO_CORRECTION) != 0;
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}
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public void setDebugString(final String str) {
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if (null == str) throw new NullPointerException("Debug info is null");
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mDebugString = str;
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}
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public String getDebugString() {
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return mDebugString;
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}
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public String getWord() {
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return mWord;
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}
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@Deprecated
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public Dictionary getSourceDictionary() {
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return mSourceDict;
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}
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public int codePointAt(int i) {
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return mWord.codePointAt(i);
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}
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@Override
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public String toString() {
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if (TextUtils.isEmpty(mDebugString)) {
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return mWord;
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}
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return mWord + " (" + mDebugString + ")";
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}
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/**
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* This will always remove the higher index if a duplicate is found.
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*
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* @return position of typed word in the candidate list
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*/
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public static int removeDups(
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@Nullable final String typedWord,
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@Nonnull final ArrayList<SuggestedWordInfo> candidates) {
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if (candidates.isEmpty()) {
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return -1;
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}
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int firstOccurrenceOfWord = -1;
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if (!TextUtils.isEmpty(typedWord)) {
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firstOccurrenceOfWord = removeSuggestedWordInfoFromList(
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typedWord, candidates, -1 /* startIndexExclusive */);
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}
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for (int i = 0; i < candidates.size(); ++i) {
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removeSuggestedWordInfoFromList(
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candidates.get(i).mWord, candidates, i /* startIndexExclusive */);
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}
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return firstOccurrenceOfWord;
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}
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private static int removeSuggestedWordInfoFromList(
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@Nonnull final String word,
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@Nonnull final ArrayList<SuggestedWordInfo> candidates,
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final int startIndexExclusive) {
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int firstOccurrenceOfWord = -1;
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for (int i = startIndexExclusive + 1; i < candidates.size(); ++i) {
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final SuggestedWordInfo previous = candidates.get(i);
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if (word.equals(previous.mWord)) {
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if (firstOccurrenceOfWord == -1) {
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firstOccurrenceOfWord = i;
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}
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candidates.remove(i);
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--i;
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}
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}
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return firstOccurrenceOfWord;
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}
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}
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private static boolean isPrediction(final int inputStyle) {
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return INPUT_STYLE_PREDICTION == inputStyle
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|| INPUT_STYLE_BEGINNING_OF_SENTENCE_PREDICTION == inputStyle;
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}
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public boolean isPrediction() {
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return isPrediction(mInputStyle);
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}
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/**
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* @return the {@link SuggestedWordInfo} which corresponds to the word that is originally
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* typed by the user. Otherwise returns {@code null}. Note that gesture input is not
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* considered to be a typed word.
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*/
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@UsedForTesting
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public SuggestedWordInfo getTypedWordInfoOrNull() {
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if (SuggestedWords.INDEX_OF_TYPED_WORD >= size()) {
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return null;
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}
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final SuggestedWordInfo info = getInfo(SuggestedWords.INDEX_OF_TYPED_WORD);
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return (info.getKind() == SuggestedWordInfo.KIND_TYPED) ? info : null;
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}
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}
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