| /* |
| * Copyright (C) 2017 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 com.android.systemui.statusbar.phone; |
| |
| import android.view.MotionEvent; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.systemui.dagger.qualifiers.Main; |
| import com.android.systemui.plugins.FalsingManager; |
| import com.android.systemui.util.concurrency.DelayableExecutor; |
| |
| import javax.inject.Inject; |
| |
| /** |
| * Detects single and double taps on notifications. |
| */ |
| public class NotificationTapHelper { |
| |
| public static final long DOUBLE_TAP_TIMEOUT_MS = 1200; |
| |
| private final ActivationListener mActivationListener; |
| private final DoubleTapListener mDoubleTapListener; |
| private final FalsingManager mFalsingManager; |
| private final DelayableExecutor mExecutor; |
| private final SlideBackListener mSlideBackListener; |
| |
| private boolean mTrackTouch; |
| private Runnable mTimeoutCancel; |
| |
| private NotificationTapHelper(FalsingManager falsingManager, DelayableExecutor executor, |
| ActivationListener activationListener, DoubleTapListener doubleTapListener, |
| SlideBackListener slideBackListener) { |
| mFalsingManager = falsingManager; |
| mExecutor = executor; |
| mActivationListener = activationListener; |
| mDoubleTapListener = doubleTapListener; |
| mSlideBackListener = slideBackListener; |
| } |
| |
| @VisibleForTesting |
| boolean onTouchEvent(MotionEvent event) { |
| return onTouchEvent(event, Integer.MAX_VALUE); |
| } |
| |
| /** Call to have the helper process a touch event. */ |
| public boolean onTouchEvent(MotionEvent event, int maxTouchableHeight) { |
| int action = event.getActionMasked(); |
| switch (action) { |
| case MotionEvent.ACTION_DOWN: |
| mTrackTouch = event.getY() <= maxTouchableHeight; |
| break; |
| case MotionEvent.ACTION_MOVE: |
| if (mTrackTouch && !mFalsingManager.isSimpleTap()) { |
| makeInactive(); |
| mTrackTouch = false; |
| } |
| break; |
| case MotionEvent.ACTION_CANCEL: |
| makeInactive(); |
| mTrackTouch = false; |
| break; |
| case MotionEvent.ACTION_UP: |
| mTrackTouch = false; |
| |
| // 1) See if we have confidence that we can activate after a single tap. |
| // 2) Else, see if it looks like a tap at all and check for a double-tap. |
| if (!mFalsingManager.isFalseTap(FalsingManager.NO_PENALTY)) { |
| makeInactive(); |
| return mDoubleTapListener.onDoubleTap(); |
| } else if (mFalsingManager.isSimpleTap()) { |
| if (mSlideBackListener != null && mSlideBackListener.onSlideBack()) { |
| return true; |
| } |
| if (mTimeoutCancel == null) { |
| // first tap |
| makeActive(); |
| return true; |
| } else { |
| // second tap |
| makeInactive(); |
| if (!mFalsingManager.isFalseDoubleTap()) { |
| return mDoubleTapListener.onDoubleTap(); |
| } |
| } |
| } else { |
| makeInactive(); |
| } |
| break; |
| default: |
| break; |
| } |
| return mTrackTouch; |
| } |
| |
| private void makeActive() { |
| mTimeoutCancel = mExecutor.executeDelayed(this::makeInactive, DOUBLE_TAP_TIMEOUT_MS); |
| mActivationListener.onActiveChanged(true); |
| } |
| |
| private void makeInactive() { |
| mActivationListener.onActiveChanged(false); |
| if (mTimeoutCancel != null) { |
| mTimeoutCancel.run(); |
| mTimeoutCancel = null; |
| } |
| } |
| |
| /** */ |
| @FunctionalInterface |
| public interface ActivationListener { |
| /** */ |
| void onActiveChanged(boolean active); |
| } |
| |
| /** */ |
| @FunctionalInterface |
| public interface DoubleTapListener { |
| /** */ |
| boolean onDoubleTap(); |
| } |
| |
| /** */ |
| @FunctionalInterface |
| public interface SlideBackListener { |
| /** */ |
| boolean onSlideBack(); |
| } |
| |
| /** |
| * Injectable factory that creates a {@link NotificationTapHelper}. |
| */ |
| public static class Factory { |
| private final FalsingManager mFalsingManager; |
| private final DelayableExecutor mDelayableExecutor; |
| |
| @Inject |
| public Factory(FalsingManager falsingManager, @Main DelayableExecutor delayableExecutor) { |
| mFalsingManager = falsingManager; |
| mDelayableExecutor = delayableExecutor; |
| } |
| |
| /** Create a {@link NotificationTapHelper} */ |
| public NotificationTapHelper create(ActivationListener activationListener, |
| DoubleTapListener doubleTapListener, SlideBackListener slideBackListener) { |
| return new NotificationTapHelper(mFalsingManager, mDelayableExecutor, |
| activationListener, doubleTapListener, slideBackListener); |
| } |
| } |
| } |