119 lines
4.8 KiB
C++
119 lines
4.8 KiB
C++
/*
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* Copyright (C) 2011 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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#ifndef LATINIME_PROXIMITY_INFO_H
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#define LATINIME_PROXIMITY_INFO_H
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#include <stdint.h>
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#include "defines.h"
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namespace latinime {
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class Correction;
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class ProximityInfo {
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public:
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static const int NORMALIZED_SQUARED_DISTANCE_SCALING_FACTOR_LOG_2 = 10;
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static const int NORMALIZED_SQUARED_DISTANCE_SCALING_FACTOR =
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1 << NORMALIZED_SQUARED_DISTANCE_SCALING_FACTOR_LOG_2;
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// Used as a return value for character comparison
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typedef enum {
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// Same char, possibly with different case or accent
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EQUIVALENT_CHAR,
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// It is a char located nearby on the keyboard
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NEAR_PROXIMITY_CHAR,
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// It is an unrelated char
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UNRELATED_CHAR
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} ProximityType;
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ProximityInfo(const int maxProximityCharsSize, const int keyboardWidth,
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const int keybaordHeight, const int gridWidth, const int gridHeight,
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const uint32_t *proximityCharsArray, const int keyCount, const int32_t *keyXCoordinates,
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const int32_t *keyYCoordinates, const int32_t *keyWidths, const int32_t *keyHeights,
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const int32_t *keyCharCodes, const float *sweetSpotCenterXs,
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const float *sweetSpotCenterYs, const float *sweetSpotRadii);
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~ProximityInfo();
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bool hasSpaceProximity(const int x, const int y) const;
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void setInputParams(const int* inputCodes, const int inputLength,
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const int *xCoordinates, const int *yCoordinates);
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const int* getProximityCharsAt(const int index) const;
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unsigned short getPrimaryCharAt(const int index) const;
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bool existsCharInProximityAt(const int index, const int c) const;
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bool existsAdjacentProximityChars(const int index) const;
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ProximityType getMatchedProximityId(const int index, const unsigned short c,
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const bool checkProximityChars, int *proximityIndex = 0) const;
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int getNormalizedSquaredDistance(const int inputIndex, const int proximityIndex) const {
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return mNormalizedSquaredDistances[inputIndex * MAX_PROXIMITY_CHARS_SIZE + proximityIndex];
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}
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bool sameAsTyped(const unsigned short *word, int length) const;
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const unsigned short* getPrimaryInputWord() const {
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return mPrimaryInputWord;
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}
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bool touchPositionCorrectionEnabled() const {
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return mTouchPositionCorrectionEnabled;
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}
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private:
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// The max number of the keys in one keyboard layout
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static const int MAX_KEY_COUNT_IN_A_KEYBOARD = 64;
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// The upper limit of the char code in mCodeToKeyIndex
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static const int MAX_CHAR_CODE = 127;
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int getStartIndexFromCoordinates(const int x, const int y) const;
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void initializeCodeToKeyIndex();
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float calculateNormalizedSquaredDistance(const int keyIndex, const int inputIndex) const;
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float calculateSquaredDistanceFromSweetSpotCenter(
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const int keyIndex, const int inputIndex) const;
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int getKeyIndex(const int c) const;
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bool hasSweetSpotData(const int keyIndex) const {
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// When there are no calibration data for a key,
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// the radius of the key is assigned to zero.
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return mSweetSpotRadii[keyIndex] > 0.0;
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}
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const int MAX_PROXIMITY_CHARS_SIZE;
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const int KEYBOARD_WIDTH;
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const int KEYBOARD_HEIGHT;
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const int GRID_WIDTH;
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const int GRID_HEIGHT;
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const int CELL_WIDTH;
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const int CELL_HEIGHT;
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const int KEY_COUNT;
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const bool HAS_TOUCH_POSITION_CORRECTION_DATA;
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const int *mInputCodes;
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const int *mInputXCoordinates;
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const int *mInputYCoordinates;
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bool mTouchPositionCorrectionEnabled;
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uint32_t *mProximityCharsArray;
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int *mNormalizedSquaredDistances;
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int32_t mKeyXCoordinates[MAX_KEY_COUNT_IN_A_KEYBOARD];
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int32_t mKeyYCoordinates[MAX_KEY_COUNT_IN_A_KEYBOARD];
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int32_t mKeyWidths[MAX_KEY_COUNT_IN_A_KEYBOARD];
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int32_t mKeyHeights[MAX_KEY_COUNT_IN_A_KEYBOARD];
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int32_t mKeyCharCodes[MAX_KEY_COUNT_IN_A_KEYBOARD];
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float mSweetSpotCenterXs[MAX_KEY_COUNT_IN_A_KEYBOARD];
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float mSweetSpotCenterYs[MAX_KEY_COUNT_IN_A_KEYBOARD];
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float mSweetSpotRadii[MAX_KEY_COUNT_IN_A_KEYBOARD];
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int mInputLength;
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unsigned short mPrimaryInputWord[MAX_WORD_LENGTH_INTERNAL];
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int mCodeToKeyIndex[MAX_CHAR_CODE + 1];
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};
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} // namespace latinime
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#endif // LATINIME_PROXIMITY_INFO_H
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