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Refactor getKeyIndexAndNearbyCodes into independent class 

Bug: 2910379
Change-Id: Ib26a898ea108ee4292f9f91b6d7d10c1fc380fd1
main
Tadashi G. Takaoka 2010-08-26 17:49:26 +09:00
parent dfbc5080a1
commit e83d7385ab
2 changed files with 122 additions and 66 deletions
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75
java/src/com/android/inputmethod/latin/LatinKeyboardBaseView.java
View File

@ -43,7 +43,6 @@ import android.view.ViewGroup.LayoutParams;
import android.widget.PopupWindow;
import android.widget.TextView;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@ -143,7 +142,7 @@ public class LatinKeyboardBaseView extends View implements View.OnClickListener
public static final int NOT_A_TOUCH_COORDINATE = -1;
private static final boolean DEBUG = false;
private static final int NOT_A_KEY = -1;
static final int NOT_A_KEY = -1;
private static final int[] KEY_DELETE = { Keyboard.KEYCODE_DELETE };
private static final int[] LONG_PRESSABLE_STATE_SET = { android.R.attr.state_long_pressable };
@ -184,7 +183,7 @@ public class LatinKeyboardBaseView extends View implements View.OnClickListener
private static final int DEBOUNCE_TIME = 70;
private int mVerticalCorrection;
private int mProximityThreshold;
private ProximityKeyDetector mProximityKeyDetector = new ProximityKeyDetector();
private boolean mPreviewCentered = false;
private boolean mShowPreview = true;
@ -193,13 +192,10 @@ public class LatinKeyboardBaseView extends View implements View.OnClickListener
private int mPopupPreviewY;
private int mWindowY;
private boolean mProximityCorrectOn;
private Paint mPaint;
private Rect mPadding;
private int mCurrentKey = NOT_A_KEY;
private int mDownKey = NOT_A_KEY;
private int mStartX;
private int mStartY;
@ -227,9 +223,6 @@ public class LatinKeyboardBaseView extends View implements View.OnClickListener
private static final int REPEAT_START_DELAY = 400;
private static final int LONGPRESS_TIMEOUT = ViewConfiguration.getLongPressTimeout();
private static int MAX_NEARBY_KEYS = 12;
private int[] mDistances = new int[MAX_NEARBY_KEYS];
// For multi-tap
private int mLastSentIndex;
private int mTapCount;
@ -625,6 +618,7 @@ public class LatinKeyboardBaseView extends View implements View.OnClickListener
LatinImeLogger.onSetKeyboard(mKeyboard);
List<Key> keys = mKeyboard.getKeys();
mKeys = keys.toArray(new Key[keys.size()]);
mProximityKeyDetector.setKeyboard(keyboard, mKeys);
requestLayout();
// Hint to reallocate the buffer if the size changed
mKeyboardChanged = true;
@ -719,14 +713,14 @@ public class LatinKeyboardBaseView extends View implements View.OnClickListener
* @param enabled whether or not the proximity correction is enabled
*/
public void setProximityCorrectionEnabled(boolean enabled) {
mProximityCorrectOn = enabled;
mProximityKeyDetector.setProximityCorrectionEnabled(enabled);
}
/**
* Returns true if proximity correction is enabled.
*/
public boolean isProximityCorrectionEnabled() {
return mProximityCorrectOn;
return mProximityKeyDetector.isProximityCorrectionEnabled();
}
/**
@ -778,8 +772,7 @@ public class LatinKeyboardBaseView extends View implements View.OnClickListener
dimensionSum += Math.min(key.width, key.height) + key.gap;
}
if (dimensionSum < 0 || length == 0) return;
mProximityThreshold = (int) (dimensionSum * 1.4f / length);
mProximityThreshold *= mProximityThreshold; // Square it
mProximityKeyDetector.setProximityThreshold((int) (dimensionSum * 1.4f / length));
final float hysteresisPixel = getContext().getResources()
.getDimension(R.dimen.key_debounce_hysteresis_distance);
@ -920,54 +913,6 @@ public class LatinKeyboardBaseView extends View implements View.OnClickListener
mDirtyRect.setEmpty();
}
private int getKeyIndexAndNearbyCodes(int x, int y, int[] allKeys) {
final Key[] keys = mKeys;
int primaryIndex = NOT_A_KEY;
int closestKey = NOT_A_KEY;
int closestKeyDist = mProximityThreshold + 1;
Arrays.fill(mDistances, Integer.MAX_VALUE);
int [] nearestKeyIndices = mKeyboard.getNearestKeys(x, y);
final int keyCount = nearestKeyIndices.length;
for (int i = 0; i < keyCount; i++) {
final Key key = keys[nearestKeyIndices[i]];
int dist = 0;
boolean isInside = key.isInside(x,y);
if (isInside) {
primaryIndex = nearestKeyIndices[i];
}
if (((mProximityCorrectOn
&& (dist = key.squaredDistanceFrom(x, y)) < mProximityThreshold)
|| isInside)
&& key.codes[0] > 32) {
// Find insertion point
final int nCodes = key.codes.length;
if (dist < closestKeyDist) {
closestKeyDist = dist;
closestKey = nearestKeyIndices[i];
}
if (allKeys == null) continue;
for (int j = 0; j < mDistances.length; j++) {
if (mDistances[j] > dist) {
// Make space for nCodes codes
System.arraycopy(mDistances, j, mDistances, j + nCodes,
mDistances.length - j - nCodes);
System.arraycopy(allKeys, j, allKeys, j + nCodes,
allKeys.length - j - nCodes);
System.arraycopy(key.codes, 0, allKeys, j, nCodes);
Arrays.fill(mDistances, j, j + nCodes, dist);
break;
}
}
}
}
if (primaryIndex == NOT_A_KEY) {
primaryIndex = closestKey;
}
return primaryIndex;
}
private void detectAndSendKey(int index, int x, int y, long eventTime) {
if (index != NOT_A_KEY && index < mKeys.length) {
@ -978,9 +923,8 @@ public class LatinKeyboardBaseView extends View implements View.OnClickListener
} else {
int code = key.codes[0];
//TextEntryState.keyPressedAt(key, x, y);
int[] codes = new int[MAX_NEARBY_KEYS];
Arrays.fill(codes, NOT_A_KEY);
getKeyIndexAndNearbyCodes(x, y, codes);
int[] codes = mProximityKeyDetector.newCodeArray();
mProximityKeyDetector.getKeyIndexAndNearbyCodes(x, y, codes);
// Multi-tap
if (mInMultiTap) {
if (mTapCount != -1) {
@ -1352,13 +1296,12 @@ public class LatinKeyboardBaseView extends View implements View.OnClickListener
int touchY = (int) me.getY() + mVerticalCorrection - getPaddingTop();
final int action = me.getAction();
final long eventTime = me.getEventTime();
int keyIndex = getKeyIndexAndNearbyCodes(touchX, touchY, null);
int keyIndex = mProximityKeyDetector.getKeyIndexAndNearbyCodes(touchX, touchY, null);
switch (action) {
case MotionEvent.ACTION_DOWN:
mAbortKey = false;
mCurrentKey = keyIndex;
mDownKey = keyIndex;
mStartX = touchX;
mStartY = touchY;
mDebouncer.startMoveDebouncing(touchX, touchY);

113
java/src/com/android/inputmethod/latin/ProximityKeyDetector.java Normal file
View File

@ -0,0 +1,113 @@
/*
* Copyright (C) 2010 Google Inc.
*
* 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.
*/
package com.android.inputmethod.latin;
import android.inputmethodservice.Keyboard;
import android.inputmethodservice.Keyboard.Key;
import java.util.Arrays;
class ProximityKeyDetector {
private static final int MAX_NEARBY_KEYS = 12;
private Keyboard mKeyboard;
private Key[] mKeys;
private boolean mProximityCorrectOn;
private int mProximityThresholdSquare;
// working area
private int[] mDistances = new int[MAX_NEARBY_KEYS];
public void setKeyboard(Keyboard keyboard, Key[] keys) {
if (keyboard == null || keys == null)
throw new NullPointerException();
mKeyboard = keyboard;
mKeys = keys;
}
public void setProximityCorrectionEnabled(boolean enabled) {
mProximityCorrectOn = enabled;
}
public boolean isProximityCorrectionEnabled() {
return mProximityCorrectOn;
}
public void setProximityThreshold(int threshold) {
mProximityThresholdSquare = threshold * threshold;
}
public int[] newCodeArray() {
int[] codes = new int[MAX_NEARBY_KEYS];
Arrays.fill(codes, LatinKeyboardBaseView.NOT_A_KEY);
return codes;
}
public int getKeyIndexAndNearbyCodes(int x, int y, int[] allKeys) {
final Key[] keys = mKeys;
if (keys == null)
throw new IllegalStateException("keyboard isn't set");
// mKeyboard is guaranteed not null at setKeybaord() method
int primaryIndex = LatinKeyboardBaseView.NOT_A_KEY;
int closestKey = LatinKeyboardBaseView.NOT_A_KEY;
int closestKeyDist = mProximityThresholdSquare + 1;
int[] distances = mDistances;
Arrays.fill(distances, Integer.MAX_VALUE);
int [] nearestKeyIndices = mKeyboard.getNearestKeys(x, y);
final int keyCount = nearestKeyIndices.length;
for (int i = 0; i < keyCount; i++) {
final Key key = keys[nearestKeyIndices[i]];
int dist = 0;
boolean isInside = key.isInside(x,y);
if (isInside) {
primaryIndex = nearestKeyIndices[i];
}
if (((mProximityCorrectOn
&& (dist = key.squaredDistanceFrom(x, y)) < mProximityThresholdSquare)
|| isInside)
&& key.codes[0] > 32) {
// Find insertion point
final int nCodes = key.codes.length;
if (dist < closestKeyDist) {
closestKeyDist = dist;
closestKey = nearestKeyIndices[i];
}
if (allKeys == null) continue;
for (int j = 0; j < distances.length; j++) {
if (distances[j] > dist) {
// Make space for nCodes codes
System.arraycopy(distances, j, distances, j + nCodes,
distances.length - j - nCodes);
System.arraycopy(allKeys, j, allKeys, j + nCodes,
allKeys.length - j - nCodes);
System.arraycopy(key.codes, 0, allKeys, j, nCodes);
Arrays.fill(distances, j, j + nCodes, dist);
break;
}
}
}
}
if (primaryIndex == LatinKeyboardBaseView.NOT_A_KEY) {
primaryIndex = closestKey;
}
return primaryIndex;
}
}