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Use ArrayList to implement PointerTrackerQueue

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Change-Id: Ie386e6c7869df4df940e09fccffc5cd661134557
This commit is contained in:
Tadashi G. Takaoka 2012-08-07 14:30:28 +09:00
parent 0cc425bd9c
commit 7ae1fd02d4
3 changed files with 116 additions and 49 deletions
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2
java/src/com/android/inputmethod/keyboard/PointerTracker.java
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@ -34,7 +34,7 @@ import com.android.inputmethod.research.ResearchLogger;
import java.util.ArrayList; import java.util.ArrayList;
public class PointerTracker implements PointerTrackerQueue.ElementActions { public class PointerTracker implements PointerTrackerQueue.Element {
private static final String TAG = PointerTracker.class.getSimpleName(); private static final String TAG = PointerTracker.class.getSimpleName();
private static final boolean DEBUG_EVENT = false; private static final boolean DEBUG_EVENT = false;
private static final boolean DEBUG_MOVE_EVENT = false; private static final boolean DEBUG_MOVE_EVENT = false;

161
java/src/com/android/inputmethod/keyboard/internal/PointerTrackerQueue.java
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@ -18,85 +18,146 @@ package com.android.inputmethod.keyboard.internal;
import android.util.Log; import android.util.Log;
import java.util.Iterator; import java.util.ArrayList;
import java.util.LinkedList;
public class PointerTrackerQueue { public class PointerTrackerQueue {
private static final String TAG = PointerTrackerQueue.class.getSimpleName(); private static final String TAG = PointerTrackerQueue.class.getSimpleName();
private static final boolean DEBUG = false; private static final boolean DEBUG = false;
public interface ElementActions { public interface Element {
public boolean isModifier(); public boolean isModifier();
public boolean isInSlidingKeyInput(); public boolean isInSlidingKeyInput();
public void onPhantomUpEvent(long eventTime); public void onPhantomUpEvent(long eventTime);
} }
// TODO: Use ring buffer instead of {@link LinkedList}. private static final int INITIAL_CAPACITY = 10;
private final LinkedList<ElementActions> mQueue = new LinkedList<ElementActions>(); private final ArrayList<Element> mExpandableArrayOfActivePointers =
new ArrayList<Element>(INITIAL_CAPACITY);
private int mArraySize = 0;
public int size() { public synchronized int size() {
return mQueue.size(); return mArraySize;
} }
public synchronized void add(ElementActions tracker) { public synchronized void add(final Element pointer) {
mQueue.add(tracker); final ArrayList<Element> expandableArray = mExpandableArrayOfActivePointers;
final int arraySize = mArraySize;
if (arraySize < expandableArray.size()) {
expandableArray.set(arraySize, pointer);
} else {
expandableArray.add(pointer);
}
mArraySize = arraySize + 1;
} }
public synchronized void remove(ElementActions tracker) { public synchronized void remove(final Element pointer) {
mQueue.remove(tracker); final ArrayList<Element> expandableArray = mExpandableArrayOfActivePointers;
final int arraySize = mArraySize;
int newSize = 0;
for (int index = 0; index < arraySize; index++) {
final Element element = expandableArray.get(index);
if (element == pointer) {
if (newSize != index) {
Log.w(TAG, "Found duplicated element in remove: " + pointer);
}
continue; // Remove this element from the expandableArray.
}
if (newSize != index) {
// Shift this element toward the beginning of the expandableArray.
expandableArray.set(newSize, element);
}
newSize++;
}
mArraySize = newSize;
} }
public synchronized void releaseAllPointersOlderThan(ElementActions tracker, public synchronized void releaseAllPointersOlderThan(final Element pointer,
long eventTime) { final long eventTime) {
if (DEBUG) { if (DEBUG) {
Log.d(TAG, "releaseAllPoniterOlderThan: " + tracker + " " + this); Log.d(TAG, "releaseAllPoniterOlderThan: " + pointer + " " + this);
} }
if (!mQueue.contains(tracker)) { final ArrayList<Element> expandableArray = mExpandableArrayOfActivePointers;
return; final int arraySize = mArraySize;
} int newSize, index;
final Iterator<ElementActions> it = mQueue.iterator(); for (newSize = index = 0; index < arraySize; index++) {
while (it.hasNext()) { final Element element = expandableArray.get(index);
final ElementActions t = it.next(); if (element == pointer) {
if (t == tracker) { break; // Stop releasing elements.
break;
} }
if (!t.isModifier()) { if (!element.isModifier()) {
t.onPhantomUpEvent(eventTime); element.onPhantomUpEvent(eventTime);
it.remove(); continue; // Remove this element from the expandableArray.
}
if (newSize != index) {
// Shift this element toward the beginning of the expandableArray.
expandableArray.set(newSize, element);
}
newSize++;
}
// Shift rest of the expandableArray.
int count = 0;
for (; index < arraySize; index++) {
final Element element = expandableArray.get(index);
if (element == pointer) {
if (count > 0) {
Log.w(TAG, "Found duplicated element in releaseAllPointersOlderThan: "
+ pointer);
}
count++;
}
if (newSize != index) {
expandableArray.set(newSize, expandableArray.get(index));
newSize++;
} }
} }
mArraySize = newSize;
} }
public void releaseAllPointers(long eventTime) { public void releaseAllPointers(final long eventTime) {
releaseAllPointersExcept(null, eventTime); releaseAllPointersExcept(null, eventTime);
} }
public synchronized void releaseAllPointersExcept(ElementActions tracker, long eventTime) { public synchronized void releaseAllPointersExcept(final Element pointer,
final long eventTime) {
if (DEBUG) { if (DEBUG) {
if (tracker == null) { if (pointer == null) {
Log.d(TAG, "releaseAllPoniters: " + this); Log.d(TAG, "releaseAllPoniters: " + this);
} else { } else {
Log.d(TAG, "releaseAllPoniterExcept: " + tracker + " " + this); Log.d(TAG, "releaseAllPoniterExcept: " + pointer + " " + this);
} }
} }
final Iterator<ElementActions> it = mQueue.iterator(); final ArrayList<Element> expandableArray = mExpandableArrayOfActivePointers;
while (it.hasNext()) { final int arraySize = mArraySize;
final ElementActions t = it.next(); int newSize = 0, count = 0;
if (t != tracker) { for (int index = 0; index < arraySize; index++) {
t.onPhantomUpEvent(eventTime); final Element element = expandableArray.get(index);
it.remove(); if (element == pointer) {
if (count > 0) {
Log.w(TAG, "Found duplicated element in releaseAllPointersExcept: " + pointer);
}
count++;
} else {
element.onPhantomUpEvent(eventTime);
continue; // Remove this element from the expandableArray.
} }
if (newSize != index) {
// Shift this element toward the beginning of the expandableArray.
expandableArray.set(newSize, element);
}
newSize++;
} }
mArraySize = newSize;
} }
public synchronized boolean hasModifierKeyOlderThan(ElementActions tracker) { public synchronized boolean hasModifierKeyOlderThan(final Element pointer) {
final Iterator<ElementActions> it = mQueue.iterator(); final ArrayList<Element> expandableArray = mExpandableArrayOfActivePointers;
while (it.hasNext()) { final int arraySize = mArraySize;
final ElementActions t = it.next(); for (int index = 0; index < arraySize; index++) {
if (t == tracker) { final Element element = expandableArray.get(index);
break; if (element == pointer) {
return false; // Stop searching modifier key.
} }
if (t.isModifier()) { if (element.isModifier()) {
return true; return true;
} }
} }
@ -104,8 +165,11 @@ public class PointerTrackerQueue {
} }
public synchronized boolean isAnyInSlidingKeyInput() { public synchronized boolean isAnyInSlidingKeyInput() {
for (final ElementActions tracker : mQueue) { final ArrayList<Element> expandableArray = mExpandableArrayOfActivePointers;
if (tracker.isInSlidingKeyInput()) { final int arraySize = mArraySize;
for (int index = 0; index < arraySize; index++) {
final Element element = expandableArray.get(index);
if (element.isInSlidingKeyInput()) {
return true; return true;
} }
} }
@ -113,12 +177,15 @@ public class PointerTrackerQueue {
} }
@Override @Override
public String toString() { public synchronized String toString() {
final StringBuilder sb = new StringBuilder(); final StringBuilder sb = new StringBuilder();
for (final ElementActions tracker : mQueue) { final ArrayList<Element> expandableArray = mExpandableArrayOfActivePointers;
final int arraySize = mArraySize;
for (int index = 0; index < arraySize; index++) {
final Element element = expandableArray.get(index);
if (sb.length() > 0) if (sb.length() > 0)
sb.append(" "); sb.append(" ");
sb.append(tracker.toString()); sb.append(element.toString());
} }
return "[" + sb.toString() + "]"; return "[" + sb.toString() + "]";
} }

2
tests/src/com/android/inputmethod/keyboard/internal/PointerTrackerQueueTests.java
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@ -19,7 +19,7 @@ package com.android.inputmethod.keyboard.internal;
import android.test.AndroidTestCase; import android.test.AndroidTestCase;
public class PointerTrackerQueueTests extends AndroidTestCase { public class PointerTrackerQueueTests extends AndroidTestCase {
public static class Element implements PointerTrackerQueue.ElementActions { public static class Element implements PointerTrackerQueue.Element {
public static int sPhantomUpCount; public static int sPhantomUpCount;
public static final long NOT_HAPPENED = -1; public static final long NOT_HAPPENED = -1;