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/*
* Copyright (C) 2011 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 <assert.h>
#include <stdio.h>
#include <string>
#define LOG_TAG "LatinIME: proximity_info.cpp"
#include "additional_proximity_chars.h"
#include "defines.h"
#include "dictionary.h"
#include "proximity_info.h"
#include "proximity_info_state.h"
namespace latinime {
inline void copyOrFillZero(void *to, const void *from, size_t size) {
if (from) {
memcpy(to, from, size);
} else {
memset(to, 0, size);
}
}
ProximityInfo::ProximityInfo(const std::string localeStr, const int maxProximityCharsSize,
const int keyboardWidth, const int keyboardHeight, const int gridWidth,
const int gridHeight, const int mostCommonKeyWidth,
const int32_t *proximityCharsArray, const int keyCount, const int32_t *keyXCoordinates,
const int32_t *keyYCoordinates, const int32_t *keyWidths, const int32_t *keyHeights,
const int32_t *keyCharCodes, const float *sweetSpotCenterXs, const float *sweetSpotCenterYs,
const float *sweetSpotRadii)
: MAX_PROXIMITY_CHARS_SIZE(maxProximityCharsSize), KEYBOARD_WIDTH(keyboardWidth),
KEYBOARD_HEIGHT(keyboardHeight), GRID_WIDTH(gridWidth), GRID_HEIGHT(gridHeight),
MOST_COMMON_KEY_WIDTH_SQUARE(mostCommonKeyWidth * mostCommonKeyWidth),
CELL_WIDTH((keyboardWidth + gridWidth - 1) / gridWidth),
CELL_HEIGHT((keyboardHeight + gridHeight - 1) / gridHeight),
KEY_COUNT(min(keyCount, MAX_KEY_COUNT_IN_A_KEYBOARD)),
HAS_TOUCH_POSITION_CORRECTION_DATA(keyCount > 0 && keyXCoordinates && keyYCoordinates
&& keyWidths && keyHeights && keyCharCodes && sweetSpotCenterXs
&& sweetSpotCenterYs && sweetSpotRadii),
mLocaleStr(localeStr) {
if (DEBUG_PROXIMITY_INFO) {
AKLOGI("Create proximity info array %d", proximityGridLength);
}
const int proximityGridLength = GRID_WIDTH * GRID_HEIGHT * MAX_PROXIMITY_CHARS_SIZE;
mProximityCharsArray = new int32_t[proximityGridLength];
memcpy(mProximityCharsArray, proximityCharsArray,
proximityGridLength * sizeof(mProximityCharsArray[0]));
copyOrFillZero(mKeyXCoordinates, keyXCoordinates, KEY_COUNT * sizeof(mKeyXCoordinates[0]));
copyOrFillZero(mKeyYCoordinates, keyYCoordinates, KEY_COUNT * sizeof(mKeyYCoordinates[0]));
copyOrFillZero(mKeyWidths, keyWidths, KEY_COUNT * sizeof(mKeyWidths[0]));
copyOrFillZero(mKeyHeights, keyHeights, KEY_COUNT * sizeof(mKeyHeights[0]));
copyOrFillZero(mKeyCharCodes, keyCharCodes, KEY_COUNT * sizeof(mKeyCharCodes[0]));
copyOrFillZero(mSweetSpotCenterXs, sweetSpotCenterXs,
KEY_COUNT * sizeof(mSweetSpotCenterXs[0]));
copyOrFillZero(mSweetSpotCenterYs, sweetSpotCenterYs,
KEY_COUNT * sizeof(mSweetSpotCenterYs[0]));
copyOrFillZero(mSweetSpotRadii, sweetSpotRadii, KEY_COUNT * sizeof(mSweetSpotRadii[0]));
initializeCodeToKeyIndex();
}
// Build the reversed look up table from the char code to the index in mKeyXCoordinates,
// mKeyYCoordinates, mKeyWidths, mKeyHeights, mKeyCharCodes.
void ProximityInfo::initializeCodeToKeyIndex() {
memset(mCodeToKeyIndex, -1, (MAX_CHAR_CODE + 1) * sizeof(mCodeToKeyIndex[0]));
for (int i = 0; i < KEY_COUNT; ++i) {
const int code = mKeyCharCodes[i];
if (0 <= code && code <= MAX_CHAR_CODE) {
mCodeToKeyIndex[code] = i;
}
}
}
ProximityInfo::~ProximityInfo() {
delete[] mProximityCharsArray;
}
inline int ProximityInfo::getStartIndexFromCoordinates(const int x, const int y) const {
return ((y / CELL_HEIGHT) * GRID_WIDTH + (x / CELL_WIDTH))
* MAX_PROXIMITY_CHARS_SIZE;
}
bool ProximityInfo::hasSpaceProximity(const int x, const int y) const {
if (x < 0 || y < 0) {
if (DEBUG_DICT) {
AKLOGI("HasSpaceProximity: Illegal coordinates (%d, %d)", x, y);
assert(false);
}
return false;
}
const int startIndex = getStartIndexFromCoordinates(x, y);
if (DEBUG_PROXIMITY_INFO) {
AKLOGI("hasSpaceProximity: index %d, %d, %d", startIndex, x, y);
}
int32_t* proximityCharsArray = mProximityCharsArray;
for (int i = 0; i < MAX_PROXIMITY_CHARS_SIZE; ++i) {
if (DEBUG_PROXIMITY_INFO) {
AKLOGI("Index: %d", mProximityCharsArray[startIndex + i]);
}
if (proximityCharsArray[startIndex + i] == KEYCODE_SPACE) {
return true;
}
}
return false;
}
int ProximityInfo::squaredDistanceToEdge(const int keyId, const int x, const int y) const {
if (keyId < 0) return true; // NOT_A_ID is -1, but return whenever < 0 just in case
const int left = mKeyXCoordinates[keyId];
const int top = mKeyYCoordinates[keyId];
const int right = left + mKeyWidths[keyId];
const int bottom = top + mKeyHeights[keyId];
const int edgeX = x < left ? left : (x > right ? right : x);
const int edgeY = y < top ? top : (y > bottom ? bottom : y);
const int dx = x - edgeX;
const int dy = y - edgeY;
return dx * dx + dy * dy;
}
void ProximityInfo::calculateNearbyKeyCodes(
const int x, const int y, const int32_t primaryKey, int *inputCodes) const {
int32_t *proximityCharsArray = mProximityCharsArray;
int insertPos = 0;
inputCodes[insertPos++] = primaryKey;
const int startIndex = getStartIndexFromCoordinates(x, y);
if (startIndex >= 0) {
for (int i = 0; i < MAX_PROXIMITY_CHARS_SIZE; ++i) {
const int32_t c = proximityCharsArray[startIndex + i];
if (c < KEYCODE_SPACE || c == primaryKey) {
continue;
}
const int keyIndex = getKeyIndex(c);
const bool onKey = isOnKey(keyIndex, x, y);
const int distance = squaredDistanceToEdge(keyIndex, x, y);
if (onKey || distance < MOST_COMMON_KEY_WIDTH_SQUARE) {
inputCodes[insertPos++] = c;
if (insertPos >= MAX_PROXIMITY_CHARS_SIZE) {
if (DEBUG_DICT) {
assert(false);
}
return;
}
}
}
const int additionalProximitySize =
AdditionalProximityChars::getAdditionalCharsSize(&mLocaleStr, primaryKey);
if (additionalProximitySize > 0) {
inputCodes[insertPos++] = ADDITIONAL_PROXIMITY_CHAR_DELIMITER_CODE;
if (insertPos >= MAX_PROXIMITY_CHARS_SIZE) {
if (DEBUG_DICT) {
assert(false);
}
return;
}
const int32_t* additionalProximityChars =
AdditionalProximityChars::getAdditionalChars(&mLocaleStr, primaryKey);
for (int j = 0; j < additionalProximitySize; ++j) {
const int32_t ac = additionalProximityChars[j];
int k = 0;
for (; k < insertPos; ++k) {
if ((int)ac == inputCodes[k]) {
break;
}
}
if (k < insertPos) {
continue;
}
inputCodes[insertPos++] = ac;
if (insertPos >= MAX_PROXIMITY_CHARS_SIZE) {
if (DEBUG_DICT) {
assert(false);
}
return;
}
}
}
}
// Add a delimiter for the proximity characters
for (int i = insertPos; i < MAX_PROXIMITY_CHARS_SIZE; ++i) {
inputCodes[i] = NOT_A_CODE;
}
}
int ProximityInfo::getKeyIndex(const int c) const {
if (KEY_COUNT == 0) {
// We do not have the coordinate data
return NOT_AN_INDEX;
}
const unsigned short baseLowerC = toBaseLowerCase(c);
if (baseLowerC > MAX_CHAR_CODE) {
return NOT_AN_INDEX;
}
return mCodeToKeyIndex[baseLowerC];
}
} // namespace latinime
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