| /* |
| * Copyright (C) 2015 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 android.os.Handler; |
| |
| import com.android.internal.util.GrowingArrayUtils; |
| |
| /** |
| * Class used to enqueue pending work from Views when no Handler is attached. |
| * |
| * @hide Exposed for test framework only. |
| */ |
| public class HandlerActionQueue { |
| private HandlerAction[] mActions; |
| private int mCount; |
| |
| public void post(Runnable action) { |
| postDelayed(action, 0); |
| } |
| |
| public void postDelayed(Runnable action, long delayMillis) { |
| final HandlerAction handlerAction = new HandlerAction(action, delayMillis); |
| |
| synchronized (this) { |
| if (mActions == null) { |
| mActions = new HandlerAction[4]; |
| } |
| mActions = GrowingArrayUtils.append(mActions, mCount, handlerAction); |
| mCount++; |
| } |
| } |
| |
| public void removeCallbacks(Runnable action) { |
| synchronized (this) { |
| final int count = mCount; |
| int j = 0; |
| |
| final HandlerAction[] actions = mActions; |
| for (int i = 0; i < count; i++) { |
| if (actions[i].matches(action)) { |
| // Remove this action by overwriting it within |
| // this loop or nulling it out later. |
| continue; |
| } |
| |
| if (j != i) { |
| // At least one previous entry was removed, so |
| // this one needs to move to the "new" list. |
| actions[j] = actions[i]; |
| } |
| |
| j++; |
| } |
| |
| // The "new" list only has j entries. |
| mCount = j; |
| |
| // Null out any remaining entries. |
| for (; j < count; j++) { |
| actions[j] = null; |
| } |
| } |
| } |
| |
| public void executeActions(Handler handler) { |
| synchronized (this) { |
| final HandlerAction[] actions = mActions; |
| for (int i = 0, count = mCount; i < count; i++) { |
| final HandlerAction handlerAction = actions[i]; |
| handler.postDelayed(handlerAction.action, handlerAction.delay); |
| } |
| |
| mActions = null; |
| mCount = 0; |
| } |
| } |
| |
| public int size() { |
| return mCount; |
| } |
| |
| public Runnable getRunnable(int index) { |
| if (index >= mCount) { |
| throw new IndexOutOfBoundsException(); |
| } |
| return mActions[index].action; |
| } |
| |
| public long getDelay(int index) { |
| if (index >= mCount) { |
| throw new IndexOutOfBoundsException(); |
| } |
| return mActions[index].delay; |
| } |
| |
| private static class HandlerAction { |
| final Runnable action; |
| final long delay; |
| |
| public HandlerAction(Runnable action, long delay) { |
| this.action = action; |
| this.delay = delay; |
| } |
| |
| public boolean matches(Runnable otherAction) { |
| return otherAction == null && action == null |
| || action != null && action.equals(otherAction); |
| } |
| } |
| } |