From c25c7ccf25dd45464b82d29adca067f9a941c11c Mon Sep 17 00:00:00 2001
From: Yusuke Nojima <nojima@google.com>
Date: Mon, 3 Oct 2011 16:44:29 +0900
Subject: [PATCH] Cache the sweet spot types
Change-Id: Ibaee062dc55c11892143d48b2d0959e78e52be83
---
native/src/proximity_info.cpp | 46 ++++++++++++++++++++++-------------
native/src/proximity_info.h | 5 +++-
2 files changed, 33 insertions(+), 18 deletions(-)
diff --git a/native/src/proximity_info.cpp b/native/src/proximity_info.cpp
index 15f012d8ab..4c21c2eb31 100644
--- a/native/src/proximity_info.cpp
+++ b/native/src/proximity_info.cpp
@@ -114,40 +114,53 @@ void ProximityInfo::setInputParams(const int* inputCodes, const int inputLength,
mPrimaryInputWord[i] = getPrimaryCharAt(i);
}
mPrimaryInputWord[inputLength] = 0;
+ for (int i = 0; i < mInputLength; ++i) {
+ mSweetSpotTypes[i] = calculateSweetSpotType(i);
+ }
}
inline float square(const float x) { return x * x; }
-ProximityInfo::SweetSpotType ProximityInfo::calculateSweetSpotType(
- int index, unsigned short baseLowerC) const {
- if (KEY_COUNT == 0 || !mInputXCoordinates || !mInputYCoordinates
- || baseLowerC > MAX_CHAR_CODE) {
+ProximityInfo::SweetSpotType ProximityInfo::calculateSweetSpotType(int index) const {
+ if (KEY_COUNT == 0 || !mInputXCoordinates || !mInputYCoordinates) {
+ // We do not have the coordinate data
+ return UNKNOWN;
+ }
+ const int currentChar = getPrimaryCharAt(index);
+ const unsigned short baseLowerC = Dictionary::toBaseLowerCase(currentChar);
+ if (baseLowerC > MAX_CHAR_CODE) {
return UNKNOWN;
}
const int keyIndex = mCodeToKeyIndex[baseLowerC];
if (keyIndex < 0) {
return UNKNOWN;
}
- const float sweetSpotRadius = mSweetSpotRadii[keyIndex];
- if (sweetSpotRadius <= 0.0) {
+ const float radius = mSweetSpotRadii[keyIndex];
+ if (radius <= 0.0) {
+ // When there are no calibration data for a key,
+ // the radius of the key is assigned to zero.
return UNKNOWN;
}
- const float sweetSpotCenterX = mSweetSpotCenterXs[keyIndex];
- const float sweetSpotCenterY = mSweetSpotCenterYs[keyIndex];
- const float inputX = (float)mInputXCoordinates[index];
- const float inputY = (float)mInputYCoordinates[index];
- const float squaredDistance =
- square(inputX - sweetSpotCenterX) + square(inputY - sweetSpotCenterY);
- const float squaredSweetSpotRadius = square(sweetSpotRadius);
- if (squaredDistance <= squaredSweetSpotRadius) {
+ const float squaredRadius = square(radius);
+ const float squaredDistance = calculateSquaredDistanceFromSweetSpotCenter(keyIndex, index);
+ if (squaredDistance <= squaredRadius) {
return IN_SWEET_SPOT;
}
- if (squaredDistance <= square(NEUTRAL_AREA_RADIUS_RATIO) * squaredSweetSpotRadius) {
+ if (squaredDistance <= square(NEUTRAL_AREA_RADIUS_RATIO) * squaredRadius) {
return IN_NEUTRAL_AREA;
}
return OUT_OF_NEUTRAL_AREA;
}
+float ProximityInfo::calculateSquaredDistanceFromSweetSpotCenter(
+ int keyIndex, int inputIndex) const {
+ const float sweetSpotCenterX = mSweetSpotCenterXs[keyIndex];
+ const float sweetSpotCenterY = mSweetSpotCenterYs[keyIndex];
+ const float inputX = (float)mInputXCoordinates[inputIndex];
+ const float inputY = (float)mInputYCoordinates[inputIndex];
+ return square(inputX - sweetSpotCenterX) + square(inputY - sweetSpotCenterY);
+}
+
inline const int* ProximityInfo::getProximityCharsAt(const int index) const {
return mInputCodes + (index * MAX_PROXIMITY_CHARS_SIZE);
}
@@ -201,8 +214,7 @@ ProximityInfo::ProximityType ProximityInfo::getMatchedProximityId(
// that means the user typed that same char for this pos.
if (firstChar == baseLowerC || firstChar == c) {
if (CALIBRATE_SCORE_BY_TOUCH_COORDINATES) {
- const SweetSpotType result = calculateSweetSpotType(index, baseLowerC);
- switch (result) {
+ switch (mSweetSpotTypes[index]) {
case UNKNOWN:
return EQUIVALENT_CHAR_NORMAL;
case IN_SWEET_SPOT:
diff --git a/native/src/proximity_info.h b/native/src/proximity_info.h
index a705d0cf64..421ca0ef6e 100644
--- a/native/src/proximity_info.h
+++ b/native/src/proximity_info.h
@@ -81,7 +81,9 @@ private:
int getStartIndexFromCoordinates(const int x, const int y) const;
void initializeCodeToKeyIndex();
- SweetSpotType calculateSweetSpotType(int index, unsigned short baseLowerC) const;
+ SweetSpotType calculateSweetSpotType(int index) const;
+ float calculateSquaredDistanceFromSweetSpotCenter(int keyIndex, int inputIndex) const;
+
const int MAX_PROXIMITY_CHARS_SIZE;
const int KEYBOARD_WIDTH;
const int KEYBOARD_HEIGHT;
@@ -102,6 +104,7 @@ private:
float mSweetSpotCenterXs[MAX_KEY_COUNT_IN_A_KEYBOARD];
float mSweetSpotCenterYs[MAX_KEY_COUNT_IN_A_KEYBOARD];
float mSweetSpotRadii[MAX_KEY_COUNT_IN_A_KEYBOARD];
+ SweetSpotType mSweetSpotTypes[MAX_WORD_LENGTH_INTERNAL];
int mInputLength;
unsigned short mPrimaryInputWord[MAX_WORD_LENGTH_INTERNAL];
int mCodeToKeyIndex[MAX_CHAR_CODE + 1];
--
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