diff options
Diffstat (limited to 'native/jni/src/proximity_info.cpp')
| -rw-r--r-- | native/jni/src/proximity_info.cpp | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/native/jni/src/proximity_info.cpp b/native/jni/src/proximity_info.cpp new file mode 100644 index 000000000..2ba244a7c --- /dev/null +++ b/native/jni/src/proximity_info.cpp @@ -0,0 +1,213 @@ +/* + * 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) { + const int proximityGridLength = GRID_WIDTH * GRID_HEIGHT * MAX_PROXIMITY_CHARS_SIZE; + if (DEBUG_PROXIMITY_INFO) { + AKLOGI("Create proximity info array %d", proximityGridLength); + } + 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 |