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Refactoring keyboard drawing code and KeyDetector 

Change-Id: I55009bf38b1422301223bd90463f837562559dc5
main
Tadashi G. Takaoka 2011-04-15 13:05:58 +09:00
parent ffca763050
commit dc90d0a15f
6 changed files with 287 additions and 324 deletions
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138
java/src/com/android/inputmethod/keyboard/KeyDetector.java
View File

@ -16,35 +16,35 @@
package com.android.inputmethod.keyboard;
import android.util.Log;
import java.util.Arrays;
import java.util.List;
public abstract class KeyDetector {
public static final int NOT_A_KEY = -1;
public class KeyDetector {
private static final String TAG = KeyDetector.class.getSimpleName();
private static final boolean DEBUG = false;
public static final int NOT_A_CODE = -1;
public static final int NOT_A_KEY = -1;
protected Keyboard mKeyboard;
private Keyboard mKeyboard;
private int mCorrectionX;
private int mCorrectionY;
private boolean mProximityCorrectOn;
private int mProximityThresholdSquare;
private Key[] mKeys;
// working area
private static final int MAX_NEARBY_KEYS = 12;
private final int[] mDistances = new int[MAX_NEARBY_KEYS];
private final int[] mIndices = new int[MAX_NEARBY_KEYS];
protected int mCorrectionX;
protected int mCorrectionY;
protected boolean mProximityCorrectOn;
protected int mProximityThresholdSquare;
public Key[] setKeyboard(Keyboard keyboard, float correctionX, float correctionY) {
public void setKeyboard(Keyboard keyboard, float correctionX, float correctionY) {
if (keyboard == null)
throw new NullPointerException();
mCorrectionX = (int)correctionX;
mCorrectionY = (int)correctionY;
mKeyboard = keyboard;
List<Key> keys = mKeyboard.getKeys();
Key[] array = keys.toArray(new Key[keys.size()]);
mKeys = array;
return array;
}
protected int getTouchX(int x) {
@ -55,11 +55,11 @@ public abstract class KeyDetector {
return y + mCorrectionY;
}
protected Key[] getKeys() {
if (mKeys == null)
protected List<Key> getKeys() {
if (mKeyboard == null)
throw new IllegalStateException("keyboard isn't set");
// mKeyboard is guaranteed not to be null at setKeybaord() method if mKeys is not null
return mKeys;
return mKeyboard.getKeys();
}
public void setProximityCorrectionEnabled(boolean enabled) {
@ -74,6 +74,17 @@ public abstract class KeyDetector {
mProximityThresholdSquare = threshold * threshold;
}
/**
* Computes maximum size of the array that can contain all nearby key indices returned by
* {@link #getKeyIndexAndNearbyCodes}.
*
* @return Returns maximum size of the array that can contain all nearby key indices returned
* by {@link #getKeyIndexAndNearbyCodes}.
*/
protected int getMaxNearbyKeys() {
return MAX_NEARBY_KEYS;
}
/**
* Allocates array that can hold all key indices returned by {@link #getKeyIndexAndNearbyCodes}
* method. The maximum size of the array should be computed by {@link #getMaxNearbyKeys}.
@ -88,14 +99,60 @@ public abstract class KeyDetector {
return codes;
}
private void initializeNearbyKeys() {
Arrays.fill(mDistances, Integer.MAX_VALUE);
Arrays.fill(mIndices, NOT_A_KEY);
}
/**
* Computes maximum size of the array that can contain all nearby key indices returned by
* {@link #getKeyIndexAndNearbyCodes}.
* Insert the key into nearby keys buffer and sort nearby keys by ascending order of distance.
*
* @return Returns maximum size of the array that can contain all nearby key indices returned
* by {@link #getKeyIndexAndNearbyCodes}.
* @param keyIndex index of the key.
* @param distance distance between the key's edge and user touched point.
* @return order of the key in the nearby buffer, 0 if it is the nearest key.
*/
abstract protected int getMaxNearbyKeys();
private int sortNearbyKeys(int keyIndex, int distance) {
final int[] distances = mDistances;
final int[] indices = mIndices;
for (int insertPos = 0; insertPos < distances.length; insertPos++) {
if (distance < distances[insertPos]) {
final int nextPos = insertPos + 1;
if (nextPos < distances.length) {
System.arraycopy(distances, insertPos, distances, nextPos,
distances.length - nextPos);
System.arraycopy(indices, insertPos, indices, nextPos,
indices.length - nextPos);
}
distances[insertPos] = distance;
indices[insertPos] = keyIndex;
return insertPos;
}
}
return distances.length;
}
private void getNearbyKeyCodes(final int[] allCodes) {
final List<Key> keys = getKeys();
final int[] indices = mIndices;
// allCodes[0] should always have the key code even if it is a non-letter key.
if (indices[0] == NOT_A_KEY) {
allCodes[0] = NOT_A_CODE;
return;
}
int numCodes = 0;
for (int j = 0; j < indices.length && numCodes < allCodes.length; j++) {
final int index = indices[j];
if (index == NOT_A_KEY)
break;
final int code = keys.get(index).mCode;
// filter out a non-letter key from nearby keys
if (code < Keyboard.CODE_SPACE)
continue;
allCodes[numCodes++] = code;
}
}
/**
* Finds all possible nearby key indices around a touch event point and returns the nearest key
@ -108,5 +165,34 @@ public abstract class KeyDetector {
* @param allCodes All nearby key code except functional key are returned in this array
* @return The nearest key index
*/
abstract public int getKeyIndexAndNearbyCodes(int x, int y, final int[] allCodes);
public int getKeyIndexAndNearbyCodes(int x, int y, final int[] allCodes) {
final List<Key> keys = getKeys();
final int touchX = getTouchX(x);
final int touchY = getTouchY(y);
initializeNearbyKeys();
int primaryIndex = NOT_A_KEY;
for (final int index : mKeyboard.getNearestKeys(touchX, touchY)) {
final Key key = keys.get(index);
final boolean isInside = key.isInside(touchX, touchY);
final int distance = key.squaredDistanceToEdge(touchX, touchY);
if (isInside || (mProximityCorrectOn && distance < mProximityThresholdSquare)) {
final int insertedPosition = sortNearbyKeys(index, distance);
if (insertedPosition == 0 && isInside)
primaryIndex = index;
}
}
if (allCodes != null && allCodes.length > 0) {
getNearbyKeyCodes(allCodes);
if (DEBUG) {
Log.d(TAG, "x=" + x + " y=" + y
+ " primary="
+ (primaryIndex == NOT_A_KEY ? "none" : keys.get(primaryIndex).mCode)
+ " codes=" + Arrays.toString(allCodes));
}
}
return primaryIndex;
}
}

128
java/src/com/android/inputmethod/keyboard/KeyboardView.java
View File

@ -106,7 +106,6 @@ public class KeyboardView extends View implements PointerTracker.UIProxy {
// Main keyboard
private Keyboard mKeyboard;
private Key[] mKeys;
// Key preview popup
private boolean mInForeground;
@ -147,7 +146,7 @@ public class KeyboardView extends View implements PointerTracker.UIProxy {
// Accessibility
private boolean mIsAccessibilityEnabled;
protected KeyDetector mKeyDetector = new ProximityKeyDetector();
protected KeyDetector mKeyDetector = new KeyDetector();
// Swipe gesture detector
private GestureDetector mGestureDetector;
@ -493,10 +492,10 @@ public class KeyboardView extends View implements PointerTracker.UIProxy {
mHandler.cancelPopupPreview();
mKeyboard = keyboard;
LatinImeLogger.onSetKeyboard(keyboard);
mKeys = mKeyDetector.setKeyboard(keyboard, -getPaddingLeft(),
mKeyDetector.setKeyboard(keyboard, -getPaddingLeft(),
-getPaddingTop() + mVerticalCorrection);
for (PointerTracker tracker : mPointerTrackers) {
tracker.setKeyboard(keyboard, mKeys, mKeyHysteresisDistance);
tracker.setKeyboard(keyboard, mKeyHysteresisDistance);
}
requestLayout();
mKeyboardChanged = true;
@ -638,44 +637,75 @@ public class KeyboardView extends View implements PointerTracker.UIProxy {
}
final Canvas canvas = mCanvas;
canvas.clipRect(mDirtyRect, Op.REPLACE);
canvas.drawColor(Color.BLACK, PorterDuff.Mode.CLEAR);
if (mKeyboard == null) return;
if (mInvalidatedKey != null && mInvalidatedKeyRect.contains(mDirtyRect)) {
// Draw a single key.
onBufferDrawKey(canvas, mInvalidatedKey);
} else {
// Draw all keys.
for (final Key key : mKeyboard.getKeys()) {
onBufferDrawKey(canvas, key);
}
}
// TODO: Move this function to ProximityInfo for getting rid of
// public declarations for
// GRID_WIDTH and GRID_HEIGHT
if (DEBUG_KEYBOARD_GRID) {
Paint p = new Paint();
p.setStyle(Paint.Style.STROKE);
p.setStrokeWidth(1.0f);
p.setColor(0x800000c0);
int cw = (mKeyboard.getMinWidth() + mKeyboard.GRID_WIDTH - 1)
/ mKeyboard.GRID_WIDTH;
int ch = (mKeyboard.getHeight() + mKeyboard.GRID_HEIGHT - 1)
/ mKeyboard.GRID_HEIGHT;
for (int i = 0; i <= mKeyboard.GRID_WIDTH; i++)
canvas.drawLine(i * cw, 0, i * cw, ch * mKeyboard.GRID_HEIGHT, p);
for (int i = 0; i <= mKeyboard.GRID_HEIGHT; i++)
canvas.drawLine(0, i * ch, cw * mKeyboard.GRID_WIDTH, i * ch, p);
}
// Overlay a dark rectangle to dim the keyboard
if (mMiniKeyboardView != null) {
mPaint.setColor((int) (mBackgroundDimAmount * 0xFF) << 24);
canvas.drawRect(0, 0, width, height, mPaint);
}
mInvalidatedKey = null;
mDrawPending = false;
mDirtyRect.setEmpty();
}
private void onBufferDrawKey(final Canvas canvas, final Key key) {
final Paint paint = mPaint;
final Drawable keyBackground = mKeyBackground;
final Rect padding = mPadding;
final int kbdPaddingLeft = getPaddingLeft();
final int kbdPaddingTop = getPaddingTop();
final Key[] keys = mKeys;
final boolean isManualTemporaryUpperCase = mKeyboard.isManualTemporaryUpperCase();
final boolean drawSingleKey = (mInvalidatedKey != null
&& mInvalidatedKeyRect.contains(mDirtyRect));
canvas.drawColor(0x00000000, PorterDuff.Mode.CLEAR);
final int keyCount = keys.length;
for (int i = 0; i < keyCount; i++) {
final Key key = keys[i];
if (drawSingleKey && key != mInvalidatedKey) {
continue;
}
int[] drawableState = key.getCurrentDrawableState();
keyBackground.setState(drawableState);
// Switch the character to uppercase if shift is pressed
String label = key.mLabel == null? null : adjustCase(key.mLabel).toString();
final int keyDrawX = key.mX + key.mVisualInsetsLeft;
final int keyDrawWidth = key.mWidth - key.mVisualInsetsLeft - key.mVisualInsetsRight;
final int rowHeight = padding.top + key.mHeight;
final boolean isManualTemporaryUpperCase = mKeyboard.isManualTemporaryUpperCase();
canvas.translate(keyDrawX + kbdPaddingLeft, key.mY + kbdPaddingTop);
// Draw key background.
final int[] drawableState = key.getCurrentDrawableState();
keyBackground.setState(drawableState);
final Rect bounds = keyBackground.getBounds();
if (keyDrawWidth != bounds.right || key.mHeight != bounds.bottom) {
keyBackground.setBounds(0, 0, keyDrawWidth, key.mHeight);
}
canvas.translate(keyDrawX + kbdPaddingLeft, key.mY + kbdPaddingTop);
keyBackground.draw(canvas);
final int rowHeight = padding.top + key.mHeight;
// Draw key label
if (label != null) {
// Draw key label.
if (key.mLabel != null) {
// Switch the character to uppercase if shift is pressed
final String label = key.mLabel == null ? null : adjustCase(key.mLabel).toString();
// For characters, use large font. For labels like "Done", use small font.
final int labelSize = getLabelSizeAndSetPaint(label, key.mLabelOption, paint);
final int labelCharHeight = getLabelCharHeight(labelSize, paint);
@ -683,15 +713,13 @@ public class KeyboardView extends View implements PointerTracker.UIProxy {
// Vertical label text alignment.
final float baseline;
if ((key.mLabelOption & KEY_LABEL_OPTION_ALIGN_BOTTOM) != 0) {
baseline = key.mHeight -
+ labelCharHeight * KEY_LABEL_VERTICAL_PADDING_FACTOR;
baseline = key.mHeight - labelCharHeight * KEY_LABEL_VERTICAL_PADDING_FACTOR;
if (DEBUG_SHOW_ALIGN)
drawHorizontalLine(canvas, (int)baseline, keyDrawWidth, 0xc0008000,
new Paint());
} else { // Align center
final float centerY = (key.mHeight + padding.top - padding.bottom) / 2;
baseline = centerY
+ labelCharHeight * KEY_LABEL_VERTICAL_ADJUSTMENT_FACTOR_CENTER;
baseline = centerY + labelCharHeight * KEY_LABEL_VERTICAL_ADJUSTMENT_FACTOR_CENTER;
if (DEBUG_SHOW_ALIGN)
drawHorizontalLine(canvas, (int)baseline, keyDrawWidth, 0xc0008000,
new Paint());
@ -732,14 +760,14 @@ public class KeyboardView extends View implements PointerTracker.UIProxy {
// Turn off drop shadow
paint.setShadowLayer(0, 0, 0, 0);
}
// Draw key icon
// Draw key icon.
final Drawable icon = key.getIcon();
if (key.mLabel == null && icon != null) {
final int drawableWidth = icon.getIntrinsicWidth();
final int drawableHeight = icon.getIntrinsicHeight();
final int drawableX;
final int drawableY = (
key.mHeight + padding.top - padding.bottom - drawableHeight) / 2;
final int drawableY = (key.mHeight + padding.top - padding.bottom - drawableHeight) / 2;
if ((key.mLabelOption & KEY_LABEL_OPTION_ALIGN_LEFT) != 0) {
drawableX = padding.left + mKeyLabelHorizontalPadding;
if (DEBUG_SHOW_ALIGN)
@ -761,6 +789,8 @@ public class KeyboardView extends View implements PointerTracker.UIProxy {
drawRectangle(canvas, drawableX, drawableY, drawableWidth, drawableHeight,
0x80c00000, new Paint());
}
// Draw hint icon.
if (key.mHintIcon != null) {
final int drawableWidth = keyDrawWidth;
final int drawableHeight = key.mHeight;
@ -774,35 +804,10 @@ public class KeyboardView extends View implements PointerTracker.UIProxy {
drawRectangle(canvas, drawableX, drawableY, drawableWidth, drawableHeight,
0x80c0c000, new Paint());
}
canvas.translate(-keyDrawX - kbdPaddingLeft, -key.mY - kbdPaddingTop);
}
// TODO: Move this function to ProximityInfo for getting rid of public declarations for
// GRID_WIDTH and GRID_HEIGHT
if (DEBUG_KEYBOARD_GRID) {
Paint p = new Paint();
p.setStyle(Paint.Style.STROKE);
p.setStrokeWidth(1.0f);
p.setColor(0x800000c0);
int cw = (mKeyboard.getMinWidth() + mKeyboard.GRID_WIDTH - 1) / mKeyboard.GRID_WIDTH;
int ch = (mKeyboard.getHeight() + mKeyboard.GRID_HEIGHT - 1) / mKeyboard.GRID_HEIGHT;
for (int i = 0; i <= mKeyboard.GRID_WIDTH; i++)
canvas.drawLine(i * cw, 0, i * cw, ch * mKeyboard.GRID_HEIGHT, p);
for (int i = 0; i <= mKeyboard.GRID_HEIGHT; i++)
canvas.drawLine(0, i * ch, cw * mKeyboard.GRID_WIDTH, i * ch, p);
}
// Overlay a dark rectangle to dim the keyboard
if (mMiniKeyboardView != null) {
paint.setColor((int) (mBackgroundDimAmount * 0xFF) << 24);
canvas.drawRect(0, 0, width, height, paint);
}
mInvalidatedKey = null;
mDrawPending = false;
mDirtyRect.setEmpty();
}
public int getLabelSizeAndSetPaint(CharSequence label, int keyLabelOption, Paint paint) {
// For characters, use large font. For labels like "Done", use small font.
final int labelSize;
@ -1179,15 +1184,14 @@ public class KeyboardView extends View implements PointerTracker.UIProxy {
private PointerTracker getPointerTracker(final int id) {
final ArrayList<PointerTracker> pointers = mPointerTrackers;
final Key[] keys = mKeys;
final KeyboardActionListener listener = mKeyboardActionListener;
// Create pointer trackers until we can get 'id+1'-th tracker, if needed.
for (int i = pointers.size(); i <= id; i++) {
final PointerTracker tracker =
new PointerTracker(i, mHandler, mKeyDetector, this, getResources());
if (keys != null)
tracker.setKeyboard(mKeyboard, keys, mKeyHysteresisDistance);
if (mKeyboard != null)
tracker.setKeyboard(mKeyboard, mKeyHysteresisDistance);
if (listener != null)
tracker.setOnKeyboardActionListener(listener);
pointers.add(tracker);

15
java/src/com/android/inputmethod/keyboard/MiniKeyboardKeyDetector.java
View File

@ -16,9 +16,9 @@
package com.android.inputmethod.keyboard;
public class MiniKeyboardKeyDetector extends KeyDetector {
private static final int MAX_NEARBY_KEYS = 1;
import java.util.List;
public class MiniKeyboardKeyDetector extends KeyDetector {
private final int mSlideAllowanceSquare;
private final int mSlideAllowanceSquareTop;
@ -31,20 +31,21 @@ public class MiniKeyboardKeyDetector extends KeyDetector {
@Override
protected int getMaxNearbyKeys() {
return MAX_NEARBY_KEYS;
// No nearby key will be returned.
return 1;
}
@Override
public int getKeyIndexAndNearbyCodes(int x, int y, final int[] allCodes) {
final Key[] keys = getKeys();
final List<Key> keys = getKeys();
final int touchX = getTouchX(x);
final int touchY = getTouchY(y);
int nearestIndex = NOT_A_KEY;
int nearestDist = (y < 0) ? mSlideAllowanceSquareTop : mSlideAllowanceSquare;
final int keyCount = keys.length;
final int keyCount = keys.size();
for (int index = 0; index < keyCount; index++) {
final int dist = keys[index].squaredDistanceToEdge(touchX, touchY);
final int dist = keys.get(index).squaredDistanceToEdge(touchX, touchY);
if (dist < nearestDist) {
nearestIndex = index;
nearestDist = dist;
@ -52,7 +53,7 @@ public class MiniKeyboardKeyDetector extends KeyDetector {
}
if (allCodes != null && nearestIndex != NOT_A_KEY)
allCodes[0] = keys[nearestIndex].mCode;
allCodes[0] = keys.get(nearestIndex).mCode;
return nearestIndex;
}
}

35
java/src/com/android/inputmethod/keyboard/PointerTracker.java
View File

@ -25,6 +25,7 @@ import android.util.Log;
import android.view.MotionEvent;
import java.util.Arrays;
import java.util.List;
public class PointerTracker {
private static final String TAG = PointerTracker.class.getSimpleName();
@ -63,7 +64,7 @@ public class PointerTracker {
private final int mTouchNoiseThresholdDistanceSquared;
private Keyboard mKeyboard;
private Key[] mKeys;
private List<Key> mKeys;
private int mKeyHysteresisDistanceSquared = -1;
private int mKeyQuarterWidthSquared;
@ -109,8 +110,8 @@ public class PointerTracker {
public void onSwipeDown() {}
};
public PointerTracker(int id, UIHandler handler, KeyDetector keyDetector, UIProxy proxy,
Resources res) {
public PointerTracker(int id, UIHandler handler, KeyDetector keyDetector,
UIProxy proxy, Resources res) {
if (proxy == null || handler == null || keyDetector == null)
throw new NullPointerException();
mPointerId = id;
@ -197,11 +198,11 @@ public class PointerTracker {
mListener.onCancelInput();
}
public void setKeyboard(Keyboard keyboard, Key[] keys, float keyHysteresisDistance) {
if (keyboard == null || keys == null || keyHysteresisDistance < 0)
public void setKeyboard(Keyboard keyboard, float keyHysteresisDistance) {
if (keyboard == null || keyHysteresisDistance < 0)
throw new IllegalArgumentException();
mKeyboard = keyboard;
mKeys = keys;
mKeys = keyboard.getKeys();
mKeyHysteresisDistanceSquared = (int)(keyHysteresisDistance * keyHysteresisDistance);
final int keyQuarterWidth = keyboard.getKeyWidth() / 4;
mKeyQuarterWidthSquared = keyQuarterWidth * keyQuarterWidth;
@ -214,11 +215,11 @@ public class PointerTracker {
}
private boolean isValidKeyIndex(int keyIndex) {
return keyIndex >= 0 && keyIndex < mKeys.length;
return keyIndex >= 0 && keyIndex < mKeys.size();
}
public Key getKey(int keyIndex) {
return isValidKeyIndex(keyIndex) ? mKeys[keyIndex] : null;
return isValidKeyIndex(keyIndex) ? mKeys.get(keyIndex) : null;
}
private static boolean isModifierCode(int primaryCode) {
@ -258,12 +259,14 @@ public class PointerTracker {
mPreviousKey = keyIndex;
if (keyIndex != oldKeyIndex) {
if (isValidKeyIndex(oldKeyIndex)) {
mKeys[oldKeyIndex].onReleased();
mProxy.invalidateKey(mKeys[oldKeyIndex]);
final Key oldKey = mKeys.get(oldKeyIndex);
oldKey.onReleased();
mProxy.invalidateKey(oldKey);
}
if (isValidKeyIndex(keyIndex)) {
mKeys[keyIndex].onPressed();
mProxy.invalidateKey(mKeys[keyIndex]);
final Key newKey = mKeys.get(keyIndex);
newKey.onPressed();
mProxy.invalidateKey(newKey);
}
}
}
@ -488,9 +491,6 @@ public class PointerTracker {
if (!mIsRepeatableKey) {
detectAndSendKey(keyIndex, x, y);
}
if (isValidKeyIndex(keyIndex))
mProxy.invalidateKey(mKeys[keyIndex]);
}
public void onCancelEvent(int x, int y, long eventTime, PointerTrackerQueue queue) {
@ -508,9 +508,6 @@ public class PointerTracker {
mHandler.cancelPopupPreview();
showKeyPreviewAndUpdateKeyGraphics(NOT_A_KEY);
mIsInSlidingKeyInput = false;
int keyIndex = mKeyState.getKeyIndex();
if (isValidKeyIndex(keyIndex))
mProxy.invalidateKey(mKeys[keyIndex]);
}
public void repeatKey(int keyIndex) {
@ -539,7 +536,7 @@ public class PointerTracker {
if (newKey == curKey) {
return true;
} else if (isValidKeyIndex(curKey)) {
return mKeys[curKey].squaredDistanceToEdge(x, y) < mKeyHysteresisDistanceSquared;
return mKeys.get(curKey).squaredDistanceToEdge(x, y) < mKeyHysteresisDistanceSquared;
} else {
return false;
}

124
java/src/com/android/inputmethod/keyboard/ProximityKeyDetector.java
View File

@ -1,124 +0,0 @@
/*
* 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.keyboard;
import android.util.Log;
import java.util.Arrays;
public class ProximityKeyDetector extends KeyDetector {
private static final String TAG = ProximityKeyDetector.class.getSimpleName();
private static final boolean DEBUG = false;
private static final int MAX_NEARBY_KEYS = 12;
// working area
private final int[] mDistances = new int[MAX_NEARBY_KEYS];
private final int[] mIndices = new int[MAX_NEARBY_KEYS];
@Override
protected int getMaxNearbyKeys() {
return MAX_NEARBY_KEYS;
}
private void initializeNearbyKeys() {
Arrays.fill(mDistances, Integer.MAX_VALUE);
Arrays.fill(mIndices, NOT_A_KEY);
}
/**
* Insert the key into nearby keys buffer and sort nearby keys by ascending order of distance.
*
* @param keyIndex index of the key.
* @param distance distance between the key's edge and user touched point.
* @return order of the key in the nearby buffer, 0 if it is the nearest key.
*/
private int sortNearbyKeys(int keyIndex, int distance) {
final int[] distances = mDistances;
final int[] indices = mIndices;
for (int insertPos = 0; insertPos < distances.length; insertPos++) {
if (distance < distances[insertPos]) {
final int nextPos = insertPos + 1;
if (nextPos < distances.length) {
System.arraycopy(distances, insertPos, distances, nextPos,
distances.length - nextPos);
System.arraycopy(indices, insertPos, indices, nextPos,
indices.length - nextPos);
}
distances[insertPos] = distance;
indices[insertPos] = keyIndex;
return insertPos;
}
}
return distances.length;
}
private void getNearbyKeyCodes(final int[] allCodes) {
final Key[] keys = getKeys();
final int[] indices = mIndices;
// allCodes[0] should always have the key code even if it is a non-letter key.
if (indices[0] == NOT_A_KEY) {
allCodes[0] = NOT_A_CODE;
return;
}
int numCodes = 0;
for (int j = 0; j < indices.length && numCodes < allCodes.length; j++) {
final int index = indices[j];
if (index == NOT_A_KEY)
break;
final int code = keys[index].mCode;
// filter out a non-letter key from nearby keys
if (code < Keyboard.CODE_SPACE)
continue;
allCodes[numCodes++] = code;
}
}
@Override
public int getKeyIndexAndNearbyCodes(int x, int y, final int[] allCodes) {
final Key[] keys = getKeys();
final int touchX = getTouchX(x);
final int touchY = getTouchY(y);
initializeNearbyKeys();
int primaryIndex = NOT_A_KEY;
for (final int index : mKeyboard.getNearestKeys(touchX, touchY)) {
final Key key = keys[index];
final boolean isInside = key.isInside(touchX, touchY);
final int distance = key.squaredDistanceToEdge(touchX, touchY);
if (isInside || (mProximityCorrectOn && distance < mProximityThresholdSquare)) {
final int insertedPosition = sortNearbyKeys(index, distance);
if (insertedPosition == 0 && isInside)
primaryIndex = index;
}
}
if (allCodes != null && allCodes.length > 0) {
getNearbyKeyCodes(allCodes);
if (DEBUG) {
Log.d(TAG, "x=" + x + " y=" + y
+ " primary="
+ (primaryIndex == NOT_A_KEY ? "none" : keys[primaryIndex].mCode)
+ " codes=" + Arrays.toString(allCodes));
}
}
return primaryIndex;
}
}

5
tests/src/com/android/inputmethod/latin/SuggestHelper.java
View File

@ -20,7 +20,6 @@ import com.android.inputmethod.keyboard.Key;
import com.android.inputmethod.keyboard.KeyDetector;
import com.android.inputmethod.keyboard.KeyboardId;
import com.android.inputmethod.keyboard.LatinKeyboard;
import com.android.inputmethod.keyboard.ProximityKeyDetector;
import android.content.Context;
import android.text.TextUtils;
@ -38,7 +37,7 @@ public class SuggestHelper {
// (and not try to find a dictionary provider for a specified locale)
mSuggest = new Suggest(context, dictionaryId, null);
mKeyboard = new LatinKeyboard(context, keyboardId);
mKeyDetector = new ProximityKeyDetector();
mKeyDetector = new KeyDetector();
init();
}
@ -46,7 +45,7 @@ public class SuggestHelper {
KeyboardId keyboardId) {
mSuggest = new Suggest(dictionaryPath, startOffset, length, null);
mKeyboard = new LatinKeyboard(context, keyboardId);
mKeyDetector = new ProximityKeyDetector();
mKeyDetector = new KeyDetector();
init();
}