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-rw-r--r--native/jni/src/defines.h3
-rw-r--r--native/jni/src/proximity_info.cpp1
-rw-r--r--native/jni/src/proximity_info.h12
-rw-r--r--native/jni/src/proximity_info_state.cpp51
-rw-r--r--native/jni/src/proximity_info_state.h9
5 files changed, 71 insertions, 5 deletions
diff --git a/native/jni/src/defines.h b/native/jni/src/defines.h
index 2ce10d0ac..0286365bc 100644
--- a/native/jni/src/defines.h
+++ b/native/jni/src/defines.h
@@ -327,6 +327,9 @@ static inline void prof_out(void) {
// Max Distance between point to key
#define MAX_POINT_TO_KEY_LENGTH 10000000
+// The max number of the keys in one keyboard layout
+#define MAX_KEY_COUNT_IN_A_KEYBOARD 64
+
// TODO: Reduce this constant if possible; check the maximum number of digraphs in the same
// word in the dictionary for languages with digraphs, like German and French
#define DEFAULT_MAX_DIGRAPH_SEARCH_DEPTH 5
diff --git a/native/jni/src/proximity_info.cpp b/native/jni/src/proximity_info.cpp
index 737172693..a8c04300f 100644
--- a/native/jni/src/proximity_info.cpp
+++ b/native/jni/src/proximity_info.cpp
@@ -62,6 +62,7 @@ ProximityInfo::ProximityInfo(JNIEnv *env, const jstring localeJStr, const int ma
CELL_WIDTH((keyboardWidth + gridWidth - 1) / gridWidth),
CELL_HEIGHT((keyboardHeight + gridHeight - 1) / gridHeight),
KEY_COUNT(min(keyCount, MAX_KEY_COUNT_IN_A_KEYBOARD)),
+ KEYBOARD_WIDTH(keyboardWidth), KEYBOARD_HEIGHT(keyboardHeight),
HAS_TOUCH_POSITION_CORRECTION_DATA(keyCount > 0 && keyXCoordinates && keyYCoordinates
&& keyWidths && keyHeights && keyCharCodes && sweetSpotCenterXs
&& sweetSpotCenterYs && sweetSpotRadii),
diff --git a/native/jni/src/proximity_info.h b/native/jni/src/proximity_info.h
index f588874b8..7c22e108b 100644
--- a/native/jni/src/proximity_info.h
+++ b/native/jni/src/proximity_info.h
@@ -96,6 +96,14 @@ class ProximityInfo {
return GRID_HEIGHT;
}
+ int getKeyboardWidth() const {
+ return KEYBOARD_WIDTH;
+ }
+
+ int getKeyboardHeight() const {
+ return KEYBOARD_HEIGHT;
+ }
+
// TODO: These should return int.
float getKeyCenterXOfCodePointG(int charCode) const;
float getKeyCenterYOfCodePointG(int charCode) const;
@@ -105,8 +113,6 @@ class ProximityInfo {
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(ProximityInfo);
- // The max number of the keys in one keyboard layout
- static const int MAX_KEY_COUNT_IN_A_KEYBOARD = 64;
// The upper limit of the char code in mCodePointToKeyIndex
static const int MAX_CHAR_CODE = 127;
static const float NOT_A_DISTANCE_FLOAT;
@@ -136,6 +142,8 @@ class ProximityInfo {
const int CELL_WIDTH;
const int CELL_HEIGHT;
const int KEY_COUNT;
+ const int KEYBOARD_WIDTH;
+ const int KEYBOARD_HEIGHT;
const bool HAS_TOUCH_POSITION_CORRECTION_DATA;
char mLocaleStr[MAX_LOCALE_STRING_LENGTH];
int32_t *mProximityCharsArray;
diff --git a/native/jni/src/proximity_info_state.cpp b/native/jni/src/proximity_info_state.cpp
index e53394bba..c9a1ed0c0 100644
--- a/native/jni/src/proximity_info_state.cpp
+++ b/native/jni/src/proximity_info_state.cpp
@@ -76,6 +76,7 @@ void ProximityInfoState::initInputParams(const int pointerId, const float maxPoi
mTimes.clear();
mLengthCache.clear();
mDistanceCache.clear();
+ mNearKeysVector.clear();
mInputSize = 0;
if (xCoordinates && yCoordinates) {
@@ -122,14 +123,34 @@ void ProximityInfoState::initInputParams(const int pointerId, const float maxPoi
if (mInputSize > 0) {
const int keyCount = mProximityInfo->getKeyCount();
+ mNearKeysVector.resize(mInputSize);
mDistanceCache.resize(mInputSize * keyCount);
for (int i = 0; i < mInputSize; ++i) {
+ mNearKeysVector[i].reset();
+ static const float NEAR_KEY_NORMALIZED_SQUARED_THRESHOLD = 4.0f;
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] =
+ const float normalizedSquaredDistance =
mProximityInfo->getNormalizedSquaredDistanceFromCenterFloat(k, x, y);
+ mDistanceCache[index] = normalizedSquaredDistance;
+ if (normalizedSquaredDistance < NEAR_KEY_NORMALIZED_SQUARED_THRESHOLD) {
+ mNearKeysVector[i].set(k, 1);
+ }
+ }
+ }
+
+ static const float READ_FORWORD_LENGTH_SCALE = 0.95f;
+ const int readForwordLength = static_cast<int>(
+ hypotf(mProximityInfo->getKeyboardWidth(), mProximityInfo->getKeyboardHeight())
+ * READ_FORWORD_LENGTH_SCALE);
+ for (int i = 0; i < mInputSize; ++i) {
+ for (int j = i + 1; j < mInputSize; ++j) {
+ if (mLengthCache[j] - mLengthCache[i] >= readForwordLength) {
+ break;
+ }
+ mNearKeysVector[i] |= mNearKeysVector[j];
}
}
}
@@ -182,7 +203,7 @@ void ProximityInfoState::initInputParams(const int pointerId, const float maxPoi
// the given point and the nearest key position.
float ProximityInfoState::updateNearKeysDistances(const int x, const int y,
NearKeysDistanceMap *const currentNearKeysDistances) {
- static const float NEAR_KEY_THRESHOLD = 10.0f;
+ static const float NEAR_KEY_THRESHOLD = 4.0f;
currentNearKeysDistances->clear();
const int keyCount = mProximityInfo->getKeyCount();
@@ -394,4 +415,30 @@ float ProximityInfoState::calculateSquaredDistanceFromSweetSpotCenter(
const float inputY = static_cast<float>(mInputYs[inputIndex]);
return square(inputX - sweetSpotCenterX) + square(inputY - sweetSpotCenterY);
}
+
+// Puts possible characters into filter and returns new filter size.
+int32_t ProximityInfoState::getAllPossibleChars(
+ const size_t index, int32_t *const filter, const int32_t filterSize) const {
+ if (index >= mInputXs.size()) {
+ return filterSize;
+ }
+ int i = filterSize;
+ for (int j = 0; j < mProximityInfo->getKeyCount(); ++j) {
+ if (mNearKeysVector[index].test(j)) {
+ const int32_t keyCodePoint = mProximityInfo->getCodePointOf(j);
+ bool insert = true;
+ // TODO: Avoid linear search
+ for (int k = 0; k < filterSize; ++k) {
+ if (filter[k] == keyCodePoint) {
+ insert = false;
+ break;
+ }
+ }
+ if (insert) {
+ filter[i++] = keyCodePoint;
+ }
+ }
+ }
+ return i;
+}
} // namespace latinime
diff --git a/native/jni/src/proximity_info_state.h b/native/jni/src/proximity_info_state.h
index 746b9c968..80b84e962 100644
--- a/native/jni/src/proximity_info_state.h
+++ b/native/jni/src/proximity_info_state.h
@@ -17,6 +17,7 @@
#ifndef LATINIME_PROXIMITY_INFO_STATE_H
#define LATINIME_PROXIMITY_INFO_STATE_H
+#include <bitset>
#include <cstring> // for memset()
#include <stdint.h>
#include <string>
@@ -32,6 +33,7 @@ class ProximityInfo;
class ProximityInfoState {
public:
+ typedef std::bitset<MAX_KEY_COUNT_IN_A_KEYBOARD> NearKeycodesSet;
static const int NORMALIZED_SQUARED_DISTANCE_SCALING_FACTOR_LOG_2 = 10;
static const int NORMALIZED_SQUARED_DISTANCE_SCALING_FACTOR =
1 << NORMALIZED_SQUARED_DISTANCE_SCALING_FACTOR_LOG_2;
@@ -56,7 +58,8 @@ class ProximityInfoState {
mHasTouchPositionCorrectionData(false), mMostCommonKeyWidthSquare(0), mLocaleStr(),
mKeyCount(0), mCellHeight(0), mCellWidth(0), mGridHeight(0), mGridWidth(0),
mInputXs(), mInputYs(), mTimes(), mDistanceCache(), mLengthCache(),
- mTouchPositionCorrectionEnabled(false), mInputSize(0) {
+ mNearKeysVector(), mTouchPositionCorrectionEnabled(false),
+ mInputSize(0) {
memset(mInputCodes, 0, sizeof(mInputCodes));
memset(mNormalizedSquaredDistances, 0, sizeof(mNormalizedSquaredDistances));
memset(mPrimaryInputWord, 0, sizeof(mPrimaryInputWord));
@@ -215,6 +218,9 @@ class ProximityInfoState {
int getSpaceY();
+ int32_t getAllPossibleChars(
+ const size_t startIndex, int32_t *const filter, int32_t filterSize) const;
+
private:
DISALLOW_COPY_AND_ASSIGN(ProximityInfoState);
typedef hash_map_compat<int, float> NearKeysDistanceMap;
@@ -272,6 +278,7 @@ class ProximityInfoState {
std::vector<int> mTimes;
std::vector<float> mDistanceCache;
std::vector<int> mLengthCache;
+ std::vector<NearKeycodesSet> mNearKeysVector;
bool mTouchPositionCorrectionEnabled;
int32_t mInputCodes[MAX_PROXIMITY_CHARS_SIZE_INTERNAL * MAX_WORD_LENGTH_INTERNAL];
int mNormalizedSquaredDistances[MAX_PROXIMITY_CHARS_SIZE_INTERNAL * MAX_WORD_LENGTH_INTERNAL];
generated by cgit v1.2.3-83-g751a (git 2.47.1) at 2025-05-09 23:26:22 +0000