62 lines
2.4 KiB
Java
62 lines
2.4 KiB
Java
/*
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* Copyright (C) 2014 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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/**
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* Class to represent information of previous words. This class is used to add n-gram entries
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* into binary dictionaries, to get predictions, and to get suggestions.
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*/
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// TODO: Support multiple previous words for n-gram.
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public class PrevWordsInfo {
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public static final PrevWordsInfo EMPTY_PREV_WORDS_INFO = new PrevWordsInfo(null);
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public static final PrevWordsInfo BEGINNING_OF_SENTENCE = new PrevWordsInfo();
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// The word immediately before the considered word. null means we don't have any context
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// including the "beginning of sentence context" - we just don't know what to predict.
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// An example of that is after a comma.
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// For simplicity of implementation, this may also be null transiently after the WordComposer
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// was reset and before starting a new composing word, but we should never be calling
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// getSuggetions* in this situation.
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// This is an empty string when mIsBeginningOfSentence is true.
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public final String mPrevWord;
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// TODO: Have sentence separator.
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// Whether the current context is beginning of sentence or not. This is true when composing at
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// the beginning of an input field or composing a word after a sentence separator.
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public final boolean mIsBeginningOfSentence;
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// Beginning of sentence.
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public PrevWordsInfo() {
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mPrevWord = "";
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mIsBeginningOfSentence = true;
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}
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public PrevWordsInfo(final String prevWord) {
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mPrevWord = prevWord;
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mIsBeginningOfSentence = false;
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}
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public boolean isValid() {
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return mPrevWord != null;
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}
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@Override
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public String toString() {
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return "PrevWord: " + mPrevWord + ", isBeginningOfSentence: "
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+ mIsBeginningOfSentence + ".";
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}
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}
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