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Restricting children for gesture input. 

Change-Id: Id2607ef48e67685b0a71b8c628663eceb6b6fe95
main
Keisuke Kuroyanagi 2012-09-04 17:00:24 +09:00
parent d34dd5bb6b
commit 95a49a527a
5 changed files with 71 additions and 5 deletions
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3
native/jni/src/defines.h
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@ -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

1
native/jni/src/proximity_info.cpp
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@ -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),

12
native/jni/src/proximity_info.h
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@ -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;

51
native/jni/src/proximity_info_state.cpp
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@ -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

9
native/jni/src/proximity_info_state.h
View File

@ -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];