native/jni/src/dictionary.cpp

/*
 * Copyright (C) 2009, 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.
 */

#define LOG_TAG "LatinIME: dictionary.cpp"

#include <stdint.h>

#include "bigram_dictionary.h"
#include "binary_format.h"
#include "defines.h"
#include "dictionary.h"
#include "dic_traverse_wrapper.h"
#include "gesture_suggest.h"
#include "unigram_dictionary.h"

namespace latinime {

Dictionary::Dictionary(void *dict, int dictSize, int mmapFd, int dictBufAdjust)
        : mDict(static_cast<unsigned char *>(dict)),
          mOffsetDict((static_cast<unsigned char *>(dict)) + BinaryFormat::getHeaderSize(mDict)),
          mDictSize(dictSize), mMmapFd(mmapFd), mDictBufAdjust(dictBufAdjust),
          mUnigramDictionary(new UnigramDictionary(mOffsetDict, BinaryFormat::getFlags(mDict))),
          mBigramDictionary(new BigramDictionary(mOffsetDict)),
          mGestureSuggest(new GestureSuggest()) {
}

Dictionary::~Dictionary() {
    delete mUnigramDictionary;
    delete mBigramDictionary;
    delete mGestureSuggest;
}

int Dictionary::getSuggestions(ProximityInfo *proximityInfo, void *traverseSession,
        int *xcoordinates, int *ycoordinates, int *times, int *pointerIds, int *inputCodePoints,
        int inputSize, int *prevWordCodePoints, int prevWordLength, int commitPoint, bool isGesture,
        bool useFullEditDistance, int *outWords, int *frequencies, int *spaceIndices,
        int *outputTypes) const {
    int result = 0;
    if (isGesture) {
        DicTraverseWrapper::initDicTraverseSession(
                traverseSession, this, prevWordCodePoints, prevWordLength);
        result = mGestureSuggest->getSuggestions(proximityInfo, traverseSession, xcoordinates,
                ycoordinates, times, pointerIds, inputCodePoints, inputSize, commitPoint, outWords,
                frequencies, spaceIndices, outputTypes);
        if (DEBUG_DICT) {
            DUMP_RESULT(outWords, frequencies);
        }
        return result;
    } else {
        std::map<int, int> bigramMap;
        uint8_t bigramFilter[BIGRAM_FILTER_BYTE_SIZE];
        mBigramDictionary->fillBigramAddressToFrequencyMapAndFilter(prevWordCodePoints,
                prevWordLength, &bigramMap, bigramFilter);
        result = mUnigramDictionary->getSuggestions(proximityInfo, xcoordinates, ycoordinates,
                inputCodePoints, inputSize, &bigramMap, bigramFilter, useFullEditDistance, outWords,
                frequencies, outputTypes);
        return result;
    }
}

int Dictionary::getBigrams(const int *word, int length, int *inputCodePoints, int inputSize,
        int *outWords, int *frequencies, int *outputTypes) const {
    if (length <= 0) return 0;
    return mBigramDictionary->getBigrams(word, length, inputCodePoints, inputSize, outWords,
            frequencies, outputTypes);
}

int Dictionary::getFrequency(const int *word, int length) const {
    return mUnigramDictionary->getFrequency(word, length);
}

bool Dictionary::isValidBigram(const int *word1, int length1, const int *word2, int length2) const {
    return mBigramDictionary->isValidBigram(word1, length1, word2, length2);
}
} // namespace latinime