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am 14950497: am 1e256f58: Merge "Protect simultaneously modifying gesture preview data"

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* commit '14950497280f15b6d1de9e6c5d159ce46e27180b':
  Protect simultaneously modifying gesture preview data
This commit is contained in:
Tadashi G. Takaoka 2013-04-17 19:38:46 -07:00 committed by Android Git Automerger
commit 8ea774ebf2
1 changed files with 15 additions and 1 deletions
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16
java/src/com/android/inputmethod/keyboard/internal/GesturePreviewTrail.java
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@ -37,6 +37,7 @@ import com.android.inputmethod.latin.ResizableIntArray;
final class GesturePreviewTrail {
private static final int DEFAULT_CAPACITY = GestureStrokeWithPreviewPoints.PREVIEW_CAPACITY;
// These three {@link ResizableIntArray}s should be synchronized by {@link #mEventTimes}.
private final ResizableIntArray mXCoordinates = new ResizableIntArray(DEFAULT_CAPACITY);
private final ResizableIntArray mYCoordinates = new ResizableIntArray(DEFAULT_CAPACITY);
private final ResizableIntArray mEventTimes = new ResizableIntArray(DEFAULT_CAPACITY);
@ -90,7 +91,13 @@ final class GesturePreviewTrail {
}
public void addStroke(final GestureStrokeWithPreviewPoints stroke, final long downTime) {
final int trailSize = mEventTimes.getLength();
synchronized (mEventTimes) {
addStrokeLocked(stroke, downTime);
}
}
private void addStrokeLocked(final GestureStrokeWithPreviewPoints stroke, final long downTime) {
final int trailSize = mEventTimes.getLength();
stroke.appendPreviewStroke(mEventTimes, mXCoordinates, mYCoordinates);
if (mEventTimes.getLength() == trailSize) {
return;
@ -169,6 +176,13 @@ final class GesturePreviewTrail {
*/
public boolean drawGestureTrail(final Canvas canvas, final Paint paint,
final Rect outBoundsRect, final Params params) {
synchronized (mEventTimes) {
return drawGestureTrailLocked(canvas, paint, outBoundsRect, params);
}
}
private boolean drawGestureTrailLocked(final Canvas canvas, final Paint paint,
final Rect outBoundsRect, final Params params) {
// Initialize bounds rectangle.
outBoundsRect.setEmpty();
final int trailSize = mEventTimes.getLength();