LatinIME/java/src/com/android/inputmethod/keyboard/ProximityInfo.java
Tadashi G. Takaoka b4fbbe57f5 Avoid using collection interface, using array instead
Change-Id: Ie0554362b73967bfcbbab6ad19c24683066a608e
2012-03-13 20:53:15 +09:00

251 lines
11 KiB
Java

/*
* 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.
*/
package com.android.inputmethod.keyboard;
import android.graphics.Rect;
import android.text.TextUtils;
import com.android.inputmethod.keyboard.Keyboard.Params.TouchPositionCorrection;
import com.android.inputmethod.latin.JniUtils;
import com.android.inputmethod.latin.spellcheck.SpellCheckerProximityInfo;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class ProximityInfo {
public static final int MAX_PROXIMITY_CHARS_SIZE = 16;
/** Number of key widths from current touch point to search for nearest keys. */
private static float SEARCH_DISTANCE = 1.2f;
private static final Key[] EMPTY_KEY_ARRAY = new Key[0];
private final int mKeyHeight;
private final int mGridWidth;
private final int mGridHeight;
private final int mGridSize;
private final int mCellWidth;
private final int mCellHeight;
// TODO: Find a proper name for mKeyboardMinWidth
private final int mKeyboardMinWidth;
private final int mKeyboardHeight;
private final int mMostCommonKeyWidth;
private final Key[][] mGridNeighbors;
private final String mLocaleStr;
ProximityInfo(String localeStr, int gridWidth, int gridHeight, int minWidth, int height,
int mostCommonKeyWidth, int mostCommonKeyHeight, final Key[] keys,
TouchPositionCorrection touchPositionCorrection,
Map<Integer, List<Integer>> additionalProximityChars) {
if (TextUtils.isEmpty(localeStr)) {
mLocaleStr = "";
} else {
mLocaleStr = localeStr;
}
mGridWidth = gridWidth;
mGridHeight = gridHeight;
mGridSize = mGridWidth * mGridHeight;
mCellWidth = (minWidth + mGridWidth - 1) / mGridWidth;
mCellHeight = (height + mGridHeight - 1) / mGridHeight;
mKeyboardMinWidth = minWidth;
mKeyboardHeight = height;
mKeyHeight = mostCommonKeyHeight;
mMostCommonKeyWidth = mostCommonKeyWidth;
mGridNeighbors = new Key[mGridSize][];
if (minWidth == 0 || height == 0) {
// No proximity required. Keyboard might be more keys keyboard.
return;
}
computeNearestNeighbors(
mostCommonKeyWidth, keys, touchPositionCorrection, additionalProximityChars);
}
public static ProximityInfo createDummyProximityInfo() {
return new ProximityInfo("", 1, 1, 1, 1, 1, 1, EMPTY_KEY_ARRAY, null,
Collections.<Integer, List<Integer>> emptyMap());
}
public static ProximityInfo createSpellCheckerProximityInfo(final int[] proximity) {
final ProximityInfo spellCheckerProximityInfo = createDummyProximityInfo();
spellCheckerProximityInfo.mNativeProximityInfo =
spellCheckerProximityInfo.setProximityInfoNative("",
SpellCheckerProximityInfo.ROW_SIZE, 480, 300, 11, 3, (480 / 10), proximity,
0, null, null, null, null, null, null, null, null);
return spellCheckerProximityInfo;
}
private long mNativeProximityInfo;
static {
JniUtils.loadNativeLibrary();
}
private native long setProximityInfoNative(
String locale, int maxProximityCharsSize, int displayWidth,
int displayHeight, int gridWidth, int gridHeight,
int mostCommonKeyWidth, int[] proximityCharsArray,
int keyCount, int[] keyXCoordinates, int[] keyYCoordinates,
int[] keyWidths, int[] keyHeights, int[] keyCharCodes,
float[] sweetSpotCenterX, float[] sweetSpotCenterY, float[] sweetSpotRadii);
private native void releaseProximityInfoNative(long nativeProximityInfo);
private final void setProximityInfo(Key[][] gridNeighborKeys, int keyboardWidth,
int keyboardHeight, final Key[] keys, TouchPositionCorrection touchPositionCorrection) {
final int[] proximityCharsArray = new int[mGridSize * MAX_PROXIMITY_CHARS_SIZE];
Arrays.fill(proximityCharsArray, KeyDetector.NOT_A_CODE);
for (int i = 0; i < mGridSize; ++i) {
final int proximityCharsLength = gridNeighborKeys[i].length;
for (int j = 0; j < proximityCharsLength; ++j) {
proximityCharsArray[i * MAX_PROXIMITY_CHARS_SIZE + j] =
gridNeighborKeys[i][j].mCode;
}
}
final int keyCount = keys.length;
final int[] keyXCoordinates = new int[keyCount];
final int[] keyYCoordinates = new int[keyCount];
final int[] keyWidths = new int[keyCount];
final int[] keyHeights = new int[keyCount];
final int[] keyCharCodes = new int[keyCount];
final float[] sweetSpotCenterXs;
final float[] sweetSpotCenterYs;
final float[] sweetSpotRadii;
final boolean calculateSweetSpotParams;
if (touchPositionCorrection != null && touchPositionCorrection.isValid()) {
sweetSpotCenterXs = new float[keyCount];
sweetSpotCenterYs = new float[keyCount];
sweetSpotRadii = new float[keyCount];
calculateSweetSpotParams = true;
for (int i = 0; i < keyCount; i++) {
final Key key = keys[i];
keyXCoordinates[i] = key.mX;
keyYCoordinates[i] = key.mY;
keyWidths[i] = key.mWidth;
keyHeights[i] = key.mHeight;
keyCharCodes[i] = key.mCode;
if (calculateSweetSpotParams) {
final Rect hitBox = key.mHitBox;
final int row = hitBox.top / mKeyHeight;
if (row < touchPositionCorrection.mRadii.length) {
final float hitBoxCenterX = (hitBox.left + hitBox.right) * 0.5f;
final float hitBoxCenterY = (hitBox.top + hitBox.bottom) * 0.5f;
final float hitBoxWidth = hitBox.right - hitBox.left;
final float hitBoxHeight = hitBox.bottom - hitBox.top;
final float x = touchPositionCorrection.mXs[row];
final float y = touchPositionCorrection.mYs[row];
final float radius = touchPositionCorrection.mRadii[row];
sweetSpotCenterXs[i] = hitBoxCenterX + x * hitBoxWidth;
sweetSpotCenterYs[i] = hitBoxCenterY + y * hitBoxHeight;
sweetSpotRadii[i] = radius * (float) Math.sqrt(
hitBoxWidth * hitBoxWidth + hitBoxHeight * hitBoxHeight);
}
}
}
} else {
sweetSpotCenterXs = sweetSpotCenterYs = sweetSpotRadii = null;
calculateSweetSpotParams = false;
}
mNativeProximityInfo = setProximityInfoNative(mLocaleStr, MAX_PROXIMITY_CHARS_SIZE,
keyboardWidth, keyboardHeight, mGridWidth, mGridHeight, mMostCommonKeyWidth,
proximityCharsArray,
keyCount, keyXCoordinates, keyYCoordinates, keyWidths, keyHeights, keyCharCodes,
sweetSpotCenterXs, sweetSpotCenterYs, sweetSpotRadii);
}
public long getNativeProximityInfo() {
return mNativeProximityInfo;
}
@Override
protected void finalize() throws Throwable {
try {
if (mNativeProximityInfo != 0) {
releaseProximityInfoNative(mNativeProximityInfo);
mNativeProximityInfo = 0;
}
} finally {
super.finalize();
}
}
private void computeNearestNeighbors(int defaultWidth, final Key[] keys,
TouchPositionCorrection touchPositionCorrection,
Map<Integer, List<Integer>> additionalProximityChars) {
final HashMap<Integer, Key> keyCodeMap = new HashMap<Integer, Key>();
for (final Key key : keys) {
keyCodeMap.put(key.mCode, key);
}
final int thresholdBase = (int) (defaultWidth * SEARCH_DISTANCE);
final int threshold = thresholdBase * thresholdBase;
// Round-up so we don't have any pixels outside the grid
final Key[] neighborKeys = new Key[keys.length];
final int gridWidth = mGridWidth * mCellWidth;
final int gridHeight = mGridHeight * mCellHeight;
for (int x = 0; x < gridWidth; x += mCellWidth) {
for (int y = 0; y < gridHeight; y += mCellHeight) {
final int centerX = x + mCellWidth / 2;
final int centerY = y + mCellHeight / 2;
int count = 0;
for (final Key key : keys) {
if (key.isSpacer()) continue;
if (key.squaredDistanceToEdge(centerX, centerY) < threshold) {
neighborKeys[count++] = key;
}
}
int currentCodesSize = count;
for (int i = 0; i < currentCodesSize; ++i) {
final int c = neighborKeys[i].mCode;
final List<Integer> additionalChars = additionalProximityChars.get(c);
if (additionalChars == null || additionalChars.size() == 0) {
continue;
}
for (int j = 0; j < additionalChars.size(); ++j) {
final int additionalChar = additionalChars.get(j);
boolean contains = false;
for (int k = 0; k < count; ++k) {
if(additionalChar == neighborKeys[k].mCode) {
contains = true;
break;
}
}
if (!contains) {
neighborKeys[count++] = keyCodeMap.get(additionalChar);
}
}
}
mGridNeighbors[(y / mCellHeight) * mGridWidth + (x / mCellWidth)] =
Arrays.copyOfRange(neighborKeys, 0, count);
}
}
setProximityInfo(mGridNeighbors, mKeyboardMinWidth, mKeyboardHeight, keys,
touchPositionCorrection);
}
public Key[] getNearestKeys(int x, int y) {
if (mGridNeighbors == null) {
return EMPTY_KEY_ARRAY;
}
if (x >= 0 && x < mKeyboardMinWidth && y >= 0 && y < mKeyboardHeight) {
int index = (y / mCellHeight) * mGridWidth + (x / mCellWidth);
if (index < mGridSize) {
return mGridNeighbors[index];
}
}
return EMPTY_KEY_ARRAY;
}
}