| /* |
| * Copyright (C) 2010 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 android.view; |
| |
| import dalvik.system.CloseGuard; |
| |
| import android.os.Looper; |
| import android.os.MessageQueue; |
| import android.util.Pools.Pool; |
| import android.util.Pools.SimplePool; |
| import android.util.LongSparseArray; |
| |
| import java.lang.ref.WeakReference; |
| |
| /** |
| * An input queue provides a mechanism for an application to receive incoming |
| * input events. Currently only usable from native code. |
| */ |
| public final class InputQueue { |
| private final LongSparseArray<ActiveInputEvent> mActiveEventArray = |
| new LongSparseArray<ActiveInputEvent>(20); |
| private final Pool<ActiveInputEvent> mActiveInputEventPool = |
| new SimplePool<ActiveInputEvent>(20); |
| |
| private final CloseGuard mCloseGuard = CloseGuard.get(); |
| |
| private long mPtr; |
| |
| private static native long nativeInit(WeakReference<InputQueue> weakQueue, |
| MessageQueue messageQueue); |
| private static native long nativeSendKeyEvent(long ptr, KeyEvent e, boolean preDispatch); |
| private static native long nativeSendMotionEvent(long ptr, MotionEvent e); |
| private static native void nativeDispose(long ptr); |
| |
| /** @hide */ |
| public InputQueue() { |
| mPtr = nativeInit(new WeakReference<InputQueue>(this), Looper.myQueue()); |
| |
| mCloseGuard.open("dispose"); |
| } |
| |
| @Override |
| protected void finalize() throws Throwable { |
| try { |
| dispose(true); |
| } finally { |
| super.finalize(); |
| } |
| } |
| |
| /** @hide */ |
| public void dispose() { |
| dispose(false); |
| } |
| |
| /** @hide */ |
| public void dispose(boolean finalized) { |
| if (mCloseGuard != null) { |
| if (finalized) { |
| mCloseGuard.warnIfOpen(); |
| } |
| mCloseGuard.close(); |
| } |
| |
| if (mPtr != 0) { |
| nativeDispose(mPtr); |
| mPtr = 0; |
| } |
| } |
| |
| /** @hide */ |
| public long getNativePtr() { |
| return mPtr; |
| } |
| |
| /** @hide */ |
| public void sendInputEvent(InputEvent e, Object token, boolean predispatch, |
| FinishedInputEventCallback callback) { |
| ActiveInputEvent event = obtainActiveInputEvent(token, callback); |
| long id; |
| if (e instanceof KeyEvent) { |
| id = nativeSendKeyEvent(mPtr, (KeyEvent) e, predispatch); |
| } else { |
| id = nativeSendMotionEvent(mPtr, (MotionEvent) e); |
| } |
| mActiveEventArray.put(id, event); |
| } |
| |
| private void finishInputEvent(long id, boolean handled) { |
| int index = mActiveEventArray.indexOfKey(id); |
| if (index >= 0) { |
| ActiveInputEvent e = mActiveEventArray.valueAt(index); |
| mActiveEventArray.removeAt(index); |
| e.mCallback.onFinishedInputEvent(e.mToken, handled); |
| recycleActiveInputEvent(e); |
| } |
| } |
| |
| private ActiveInputEvent obtainActiveInputEvent(Object token, |
| FinishedInputEventCallback callback) { |
| ActiveInputEvent e = mActiveInputEventPool.acquire(); |
| if (e == null) { |
| e = new ActiveInputEvent(); |
| } |
| e.mToken = token; |
| e.mCallback = callback; |
| return e; |
| } |
| |
| private void recycleActiveInputEvent(ActiveInputEvent e) { |
| e.recycle(); |
| mActiveInputEventPool.release(e); |
| } |
| |
| private final class ActiveInputEvent { |
| public Object mToken; |
| public FinishedInputEventCallback mCallback; |
| |
| public void recycle() { |
| mToken = null; |
| mCallback = null; |
| } |
| } |
| |
| /** |
| * Interface to receive notification of when an InputQueue is associated |
| * and dissociated with a thread. |
| */ |
| public static interface Callback { |
| /** |
| * Called when the given InputQueue is now associated with the |
| * thread making this call, so it can start receiving events from it. |
| */ |
| void onInputQueueCreated(InputQueue queue); |
| |
| /** |
| * Called when the given InputQueue is no longer associated with |
| * the thread and thus not dispatching events. |
| */ |
| void onInputQueueDestroyed(InputQueue queue); |
| } |
| |
| /** @hide */ |
| public static interface FinishedInputEventCallback { |
| void onFinishedInputEvent(Object token, boolean handled); |
| } |
| |
| } |