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/*
* Copyright (C) 2012 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.
*/
#include <cstring> // for memset()
#include <stdint.h>
#define LOG_TAG "LatinIME: proximity_info_state.cpp"
#include "defines.h"
#include "geometry_utils.h"
#include "proximity_info.h"
#include "proximity_info_state.h"
namespace latinime {
void ProximityInfoState::initInputParams(const int pointerId, const float maxPointToKeyLength,
const ProximityInfo *proximityInfo, const int32_t *const inputCodes, const int inputSize,
const int *const xCoordinates, const int *const yCoordinates, const int *const times,
const int *const pointerIds, const bool isGeometric) {
mProximityInfo = proximityInfo;
mHasTouchPositionCorrectionData = proximityInfo->hasTouchPositionCorrectionData();
mMostCommonKeyWidthSquare = proximityInfo->getMostCommonKeyWidthSquare();
mLocaleStr = proximityInfo->getLocaleStr();
mKeyCount = proximityInfo->getKeyCount();
mCellHeight = proximityInfo->getCellHeight();
mCellWidth = proximityInfo->getCellWidth();
mGridHeight = proximityInfo->getGridWidth();
mGridWidth = proximityInfo->getGridHeight();
memset(mInputCodes, 0, sizeof(mInputCodes));
if (!isGeometric && pointerId == 0) {
// Initialize
// - mInputCodes
// - mNormalizedSquaredDistances
// TODO: Merge
for (int i = 0; i < inputSize; ++i) {
const int32_t primaryKey = inputCodes[i];
const int x = xCoordinates[i];
const int y = yCoordinates[i];
int *proximities = &mInputCodes[i * MAX_PROXIMITY_CHARS_SIZE_INTERNAL];
mProximityInfo->calculateNearbyKeyCodes(x, y, primaryKey, proximities);
}
if (DEBUG_PROXIMITY_CHARS) {
for (int i = 0; i < inputSize; ++i) {
AKLOGI("---");
for (int j = 0; j < MAX_PROXIMITY_CHARS_SIZE_INTERNAL; ++j) {
int icc = mInputCodes[i * MAX_PROXIMITY_CHARS_SIZE_INTERNAL + j];
int icfjc = inputCodes[i * MAX_PROXIMITY_CHARS_SIZE_INTERNAL + j];
icc += 0;
icfjc += 0;
AKLOGI("--- (%d)%c,%c", i, icc, icfjc); AKLOGI("--- A<%d>,B<%d>", icc, icfjc);
}
}
}
}
///////////////////////
// Setup touch points
mMaxPointToKeyLength = maxPointToKeyLength;
mInputXs.clear();
mInputYs.clear();
mTimes.clear();
mLengthCache.clear();
mDistanceCache.clear();
mInputSize = 0;
if (xCoordinates && yCoordinates) {
const bool proximityOnly = !isGeometric && (xCoordinates[0] < 0 || yCoordinates[0] < 0);
for (int i = 0; i < inputSize; ++i) {
// Assuming pointerId == 0 if pointerIds is null.
const int pid = pointerIds ? pointerIds[i] : 0;
if (pointerId == pid) {
const int c = isGeometric ? NOT_A_COORDINATE : getPrimaryCharAt(i);
const int x = proximityOnly ? NOT_A_COORDINATE : xCoordinates[i];
const int y = proximityOnly ? NOT_A_COORDINATE : yCoordinates[i];
const int time = times ? times[i] : -1;
if (pushTouchPoint(c, x, y, time, isGeometric)) {
++mInputSize;
}
}
}
}
if (mInputSize > 0) {
const int keyCount = mProximityInfo->getKeyCount();
mDistanceCache.resize(mInputSize * keyCount);
for (int i = 0; i < mInputSize; ++i) {
for (int k = 0; k < keyCount; ++k) {
const int index = i * keyCount + k;
const int x = mInputXs[i];
const int y = mInputYs[i];
mDistanceCache[index] =
mProximityInfo->getNormalizedSquaredDistanceFromCenterFloat(k, x, y);
}
}
}
// end
///////////////////////
memset(mNormalizedSquaredDistances, NOT_A_DISTANCE, sizeof(mNormalizedSquaredDistances));
memset(mPrimaryInputWord, 0, sizeof(mPrimaryInputWord));
mTouchPositionCorrectionEnabled = mInputSize > 0 && mHasTouchPositionCorrectionData
&& xCoordinates && yCoordinates && !isGeometric;
if (!isGeometric && pointerId == 0) {
for (int i = 0; i < inputSize; ++i) {
mPrimaryInputWord[i] = getPrimaryCharAt(i);
}
for (int i = 0; i < mInputSize && mTouchPositionCorrectionEnabled; ++i) {
const int *proximityChars = getProximityCharsAt(i);
const int primaryKey = proximityChars[0];
const int x = xCoordinates[i];
const int y = yCoordinates[i];
if (DEBUG_PROXIMITY_CHARS) {
int a = x + y + primaryKey;
a += 0;
AKLOGI("--- Primary = %c, x = %d, y = %d", primaryKey, x, y);
}
for (int j = 0; j < MAX_PROXIMITY_CHARS_SIZE_INTERNAL && proximityChars[j] > 0; ++j) {
const int currentChar = proximityChars[j];
const float squaredDistance =
hasInputCoordinates() ? calculateNormalizedSquaredDistance(
mProximityInfo->getKeyIndex(currentChar), i) :
NOT_A_DISTANCE_FLOAT;
if (squaredDistance >= 0.0f) {
mNormalizedSquaredDistances[i * MAX_PROXIMITY_CHARS_SIZE_INTERNAL + j] =
(int) (squaredDistance * NORMALIZED_SQUARED_DISTANCE_SCALING_FACTOR);
} else {
mNormalizedSquaredDistances[i * MAX_PROXIMITY_CHARS_SIZE_INTERNAL + j] =
(j == 0) ? EQUIVALENT_CHAR_WITHOUT_DISTANCE_INFO :
PROXIMITY_CHAR_WITHOUT_DISTANCE_INFO;
}
if (DEBUG_PROXIMITY_CHARS) {
AKLOGI("--- Proximity (%d) = %c", j, currentChar);
}
}
}
}
}
bool ProximityInfoState::pushTouchPoint(const int nodeChar, int x, int y,
const int time, const bool sample) {
const uint32_t size = mInputXs.size();
// TODO: Should have a const variable for 10
const int sampleRate = mProximityInfo->getMostCommonKeyWidth() / 10;
if (size > 0) {
const int dist = getDistanceInt(x, y, mInputXs[size - 1], mInputYs[size - 1]);
if (sample && dist < sampleRate) {
return false;
}
mLengthCache.push_back(mLengthCache[size - 1] + dist);
} else {
mLengthCache.push_back(0);
}
if (nodeChar >= 0 && (x < 0 || y < 0)) {
const int keyId = mProximityInfo->getKeyIndex(nodeChar);
if (keyId >= 0) {
x = mProximityInfo->getKeyCenterXOfIdG(keyId);
y = mProximityInfo->getKeyCenterYOfIdG(keyId);
}
}
mInputXs.push_back(x);
mInputYs.push_back(y);
mTimes.push_back(time);
return true;
}
float ProximityInfoState::calculateNormalizedSquaredDistance(
const int keyIndex, const int inputIndex) const {
if (keyIndex == NOT_AN_INDEX) {
return NOT_A_DISTANCE_FLOAT;
}
if (!mProximityInfo->hasSweetSpotData(keyIndex)) {
return NOT_A_DISTANCE_FLOAT;
}
if (NOT_A_COORDINATE == mInputXs[inputIndex]) {
return NOT_A_DISTANCE_FLOAT;
}
const float squaredDistance = calculateSquaredDistanceFromSweetSpotCenter(
keyIndex, inputIndex);
const float squaredRadius = square(mProximityInfo->getSweetSpotRadiiAt(keyIndex));
return squaredDistance / squaredRadius;
}
int ProximityInfoState::getDuration(const int index) const {
if (mInputSize > 0 && index > 0 && index < static_cast<int>(mInputSize) - 1) {
return mTimes[index + 1] - mTimes[index - 1];
}
return 0;
}
float ProximityInfoState::getPointToKeyLength(int inputIndex, int charCode, float scale) {
const int keyId = mProximityInfo->getKeyIndex(charCode);
if (keyId >= 0) {
const int index = inputIndex * mProximityInfo->getKeyCount() + keyId;
return min(mDistanceCache[index] * scale, mMaxPointToKeyLength);
}
return 0;
}
int ProximityInfoState::getKeyKeyDistance(int key0, int key1) {
return mProximityInfo->getKeyKeyDistanceG(key0, key1);
}
int ProximityInfoState::getSpaceY() {
const int keyId = mProximityInfo->getKeyIndex(' ');
return mProximityInfo->getKeyCenterYOfIdG(keyId);
}
float ProximityInfoState::calculateSquaredDistanceFromSweetSpotCenter(
const int keyIndex, const int inputIndex) const {
const float sweetSpotCenterX = mProximityInfo->getSweetSpotCenterXAt(keyIndex);
const float sweetSpotCenterY = mProximityInfo->getSweetSpotCenterYAt(keyIndex);
const float inputX = static_cast<float>(mInputXs[inputIndex]);
const float inputY = static_cast<float>(mInputYs[inputIndex]);
return square(inputX - sweetSpotCenterX) + square(inputY - sweetSpotCenterY);
}
} // namespace latinime
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