Rename PrevWordsInfo to NgramContext.

Bug: 14425059
Change-Id: Id06a71681fa8b5e589e29fba10fe5c1cfed66984

1 files changed, 0 insertions, 229 deletions

diff --git a/java/src/com/android/inputmethod/latin/PrevWordsInfo.java b/java/src/com/android/inputmethod/latin/PrevWordsInfo.java
deleted file mode 100644
index 1ef1bbb10..000000000
--- a/java/src/com/android/inputmethod/latin/PrevWordsInfo.java
+++ /dev/null
@@ -1,229 +0,0 @@
-/*
- * Copyright (C) 2014 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;
-
-import android.text.TextUtils;
-
-import com.android.inputmethod.annotations.UsedForTesting;
-import com.android.inputmethod.latin.utils.StringUtils;
-
-import java.util.Arrays;
-
-/**
- * Class to represent information of previous words. This class is used to add n-gram entries
- * into binary dictionaries, to get predictions, and to get suggestions.
- */
-public class PrevWordsInfo {
-    public static final PrevWordsInfo EMPTY_PREV_WORDS_INFO =
-            new PrevWordsInfo(WordInfo.EMPTY_WORD_INFO);
-    public static final PrevWordsInfo BEGINNING_OF_SENTENCE =
-            new PrevWordsInfo(WordInfo.BEGINNING_OF_SENTENCE);
-
-    /**
-     * Word information used to represent previous words information.
-     */
-    public static class WordInfo {
-        public static final WordInfo EMPTY_WORD_INFO = new WordInfo(null);
-        public static final WordInfo BEGINNING_OF_SENTENCE = new WordInfo();
-
-        // This is an empty char sequence when mIsBeginningOfSentence is true.
-        public final CharSequence mWord;
-        // TODO: Have sentence separator.
-        // Whether the current context is beginning of sentence or not. This is true when composing
-        // at the beginning of an input field or composing a word after a sentence separator.
-        public final boolean mIsBeginningOfSentence;
-
-        // Beginning of sentence.
-        public WordInfo() {
-            mWord = "";
-            mIsBeginningOfSentence = true;
-        }
-
-        public WordInfo(final CharSequence word) {
-            mWord = word;
-            mIsBeginningOfSentence = false;
-        }
-
-        public boolean isValid() {
-            return mWord != null;
-        }
-
-        @Override
-        public int hashCode() {
-            return Arrays.hashCode(new Object[] { mWord, mIsBeginningOfSentence } );
-        }
-
-        @Override
-        public boolean equals(Object o) {
-            if (this == o) return true;
-            if (!(o instanceof WordInfo)) return false;
-            final WordInfo wordInfo = (WordInfo)o;
-            if (mWord == null || wordInfo.mWord == null) {
-                return mWord == wordInfo.mWord
-                        && mIsBeginningOfSentence == wordInfo.mIsBeginningOfSentence;
-            }
-            return TextUtils.equals(mWord, wordInfo.mWord)
-                    && mIsBeginningOfSentence == wordInfo.mIsBeginningOfSentence;
-        }
-    }
-
-    // The words immediately before the considered word. EMPTY_WORD_INFO element means we don't
-    // have any context for that previous word including the "beginning of sentence context" - we
-    // just don't know what to predict using the information. An example of that is after a comma.
-    // For simplicity of implementation, elements may also be EMPTY_WORD_INFO transiently after the
-    // WordComposer was reset and before starting a new composing word, but we should never be
-    // calling getSuggetions* in this situation.
-    private final WordInfo[] mPrevWordsInfo;
-    private final int mPrevWordsCount;
-
-    // Construct from the previous word information.
-    public PrevWordsInfo(final WordInfo... prevWordsInfo) {
-        mPrevWordsInfo = prevWordsInfo;
-        mPrevWordsCount = prevWordsInfo.length;
-    }
-
-    // Construct from WordInfo array and size. The caller shouldn't change prevWordsInfo after
-    // calling this method.
-    private PrevWordsInfo(final PrevWordsInfo prevWordsInfo, final int prevWordsCount) {
-        if (prevWordsInfo.mPrevWordsCount < prevWordsCount) {
-            throw new IndexOutOfBoundsException("prevWordsInfo.mPrevWordsCount ("
-                    + prevWordsInfo.mPrevWordsCount + ") is smaller than prevWordsCount ("
-                    + prevWordsCount + ")");
-        }
-        mPrevWordsInfo = prevWordsInfo.mPrevWordsInfo;
-        mPrevWordsCount = prevWordsCount;
-    }
-
-    // Create next prevWordsInfo using current prevWordsInfo.
-    public PrevWordsInfo getNextPrevWordsInfo(final WordInfo wordInfo) {
-        final int nextPrevWordCount = Math.min(Constants.MAX_PREV_WORD_COUNT_FOR_N_GRAM,
-                mPrevWordsCount + 1);
-        final WordInfo[] prevWordsInfo = new WordInfo[nextPrevWordCount];
-        prevWordsInfo[0] = wordInfo;
-        System.arraycopy(mPrevWordsInfo, 0, prevWordsInfo, 1, nextPrevWordCount - 1);
-        return new PrevWordsInfo(prevWordsInfo);
-    }
-
-    public boolean isValid() {
-        return mPrevWordsCount > 0 && mPrevWordsInfo[0].isValid();
-    }
-
-    public boolean isBeginningOfSentenceContext() {
-        return mPrevWordsCount > 0 && mPrevWordsInfo[0].mIsBeginningOfSentence;
-    }
-
-    // n is 1-indexed.
-    // TODO: Remove
-    public CharSequence getNthPrevWord(final int n) {
-        if (n <= 0 || n > mPrevWordsCount) {
-            return null;
-        }
-        return mPrevWordsInfo[n - 1].mWord;
-    }
-
-    // n is 1-indexed.
-    @UsedForTesting
-    public boolean isNthPrevWordBeginningOfSontence(final int n) {
-        if (n <= 0 || n > mPrevWordsCount) {
-            return false;
-        }
-        return mPrevWordsInfo[n - 1].mIsBeginningOfSentence;
-    }
-
-    public void outputToArray(final int[][] codePointArrays,
-            final boolean[] isBeginningOfSentenceArray) {
-        for (int i = 0; i < mPrevWordsCount; i++) {
-            final WordInfo wordInfo = mPrevWordsInfo[i];
-            if (wordInfo == null || !wordInfo.isValid()) {
-                codePointArrays[i] = new int[0];
-                isBeginningOfSentenceArray[i] = false;
-                continue;
-            }
-            codePointArrays[i] = StringUtils.toCodePointArray(wordInfo.mWord);
-            isBeginningOfSentenceArray[i] = wordInfo.mIsBeginningOfSentence;
-        }
-    }
-
-    public PrevWordsInfo getTrimmedPrevWordsInfo(final int maxPrevWordCount) {
-        final int newSize = Math.min(maxPrevWordCount, mPrevWordsCount);
-        return new PrevWordsInfo(this /* prevWordsInfo */, newSize);
-    }
-
-    public int getPrevWordCount() {
-        return mPrevWordsCount;
-    }
-
-    @Override
-    public int hashCode() {
-        // Just for having equals().
-        return mPrevWordsInfo[0].hashCode();
-    }
-
-    @Override
-    public boolean equals(Object o) {
-        if (this == o) return true;
-        if (!(o instanceof PrevWordsInfo)) return false;
-        final PrevWordsInfo prevWordsInfo = (PrevWordsInfo)o;
-
-        final int minLength = Math.min(mPrevWordsCount, prevWordsInfo.mPrevWordsCount);
-        for (int i = 0; i < minLength; i++) {
-            if (!mPrevWordsInfo[i].equals(prevWordsInfo.mPrevWordsInfo[i])) {
-                return false;
-            }
-        }
-        final WordInfo[] longerWordsInfo;
-        final int longerWordsInfoCount;
-        if (mPrevWordsCount > prevWordsInfo.mPrevWordsCount) {
-            longerWordsInfo = mPrevWordsInfo;
-            longerWordsInfoCount = mPrevWordsCount;
-        } else {
-            longerWordsInfo = prevWordsInfo.mPrevWordsInfo;
-            longerWordsInfoCount = prevWordsInfo.mPrevWordsCount;
-        }
-        for (int i = minLength; i < longerWordsInfoCount; i++) {
-            if (longerWordsInfo[i] != null
-                    && !WordInfo.EMPTY_WORD_INFO.equals(longerWordsInfo[i])) {
-                return false;
-            }
-        }
-        return true;
-    }
-
-    @Override
-    public String toString() {
-        final StringBuffer builder = new StringBuffer();
-        for (int i = 0; i < mPrevWordsCount; i++) {
-            final WordInfo wordInfo = mPrevWordsInfo[i];
-            builder.append("PrevWord[");
-            builder.append(i);
-            builder.append("]: ");
-            if (wordInfo == null) {
-                builder.append("null. ");
-                continue;
-            }
-            if (!wordInfo.isValid()) {
-                builder.append("Empty. ");
-                continue;
-            }
-            builder.append(wordInfo.mWord);
-            builder.append(", isBeginningOfSentence: ");
-            builder.append(wordInfo.mIsBeginningOfSentence);
-            builder.append(". ");
-        }
-        return builder.toString();
-    }
-}