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/*
* Copyright (C) 2019 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.launcher3.uioverrides.touchcontrollers;
import static com.android.app.animation.Interpolators.DECELERATE_3;
import static com.android.launcher3.AbstractFloatingView.TYPE_ALL;
import static com.android.launcher3.AbstractFloatingView.TYPE_ALL_APPS_EDU;
import static com.android.launcher3.LauncherAnimUtils.SUCCESS_TRANSITION_PROGRESS;
import static com.android.launcher3.LauncherAnimUtils.newCancelListener;
import static com.android.launcher3.LauncherState.ALL_APPS;
import static com.android.launcher3.LauncherState.NORMAL;
import static com.android.launcher3.MotionEventsUtils.isTrackpadMotionEvent;
import static com.android.launcher3.allapps.AllAppsTransitionController.ALL_APPS_PULL_BACK_ALPHA;
import static com.android.launcher3.allapps.AllAppsTransitionController.ALL_APPS_PULL_BACK_TRANSLATION;
import static com.android.launcher3.anim.AnimatorListeners.forSuccessCallback;
import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_HOME_GESTURE;
import static com.android.launcher3.util.NavigationMode.THREE_BUTTONS;
import static com.android.systemui.shared.system.ActivityManagerWrapper.CLOSE_SYSTEM_WINDOWS_REASON_RECENTS;
import android.animation.AnimatorSet;
import android.animation.ValueAnimator;
import android.view.MotionEvent;
import android.view.animation.Interpolator;
import com.android.launcher3.AbstractFloatingView;
import com.android.launcher3.Launcher;
import com.android.launcher3.LauncherState;
import com.android.launcher3.R;
import com.android.launcher3.Utilities;
import com.android.launcher3.allapps.AllAppsTransitionController;
import com.android.launcher3.anim.AnimatorPlaybackController;
import com.android.launcher3.anim.PendingAnimation;
import com.android.launcher3.compat.AccessibilityManagerCompat;
import com.android.launcher3.config.FeatureFlags;
import com.android.launcher3.touch.SingleAxisSwipeDetector;
import com.android.launcher3.util.DisplayController;
import com.android.launcher3.util.TouchController;
import com.android.quickstep.TaskUtils;
import com.android.quickstep.util.AnimatorControllerWithResistance;
import com.android.quickstep.util.OverviewToHomeAnim;
import com.android.quickstep.views.RecentsView;
import java.util.function.Consumer;
/**
* Handles swiping up on the nav bar to go home from launcher, e.g. overview or all apps.
*/
public class NavBarToHomeTouchController implements TouchController,
SingleAxisSwipeDetector.Listener {
private static final Interpolator PULLBACK_INTERPOLATOR = DECELERATE_3;
// The min amount of overview scrim we keep during the transition.
private static final float OVERVIEW_TO_HOME_SCRIM_MULTIPLIER = 0.5f;
private final Launcher mLauncher;
private final Consumer<AnimatorSet> mCancelSplitRunnable;
private final SingleAxisSwipeDetector mSwipeDetector;
private final float mPullbackDistance;
private boolean mNoIntercept;
private LauncherState mStartState;
private LauncherState mEndState = NORMAL;
private AnimatorPlaybackController mCurrentAnimation;
/**
* @param cancelSplitRunnable Called when split placeholder view needs to be cancelled.
* Animation should be added to the provided AnimatorSet
*/
public NavBarToHomeTouchController(Launcher launcher,
Consumer<AnimatorSet> cancelSplitRunnable) {
mLauncher = launcher;
mCancelSplitRunnable = cancelSplitRunnable;
mSwipeDetector = new SingleAxisSwipeDetector(mLauncher, this,
SingleAxisSwipeDetector.VERTICAL);
mPullbackDistance = mLauncher.getResources().getDimension(R.dimen.home_pullback_distance);
}
@Override
public final boolean onControllerInterceptTouchEvent(MotionEvent ev) {
if (ev.getAction() == MotionEvent.ACTION_DOWN) {
mStartState = mLauncher.getStateManager().getState();
mNoIntercept = !canInterceptTouch(ev);
if (mNoIntercept) {
return false;
}
mSwipeDetector.setDetectableScrollConditions(SingleAxisSwipeDetector.DIRECTION_POSITIVE,
false /* ignoreSlop */);
}
if (mNoIntercept) {
return false;
}
onControllerTouchEvent(ev);
return mSwipeDetector.isDraggingOrSettling();
}
private boolean canInterceptTouch(MotionEvent ev) {
if (!isTrackpadMotionEvent(ev) && DisplayController.getNavigationMode(mLauncher)
== THREE_BUTTONS) {
return false;
}
boolean cameFromNavBar = (ev.getEdgeFlags() & Utilities.EDGE_NAV_BAR) != 0;
if (!cameFromNavBar) {
return false;
}
if (mStartState.overviewUi || mStartState == ALL_APPS) {
return true;
}
int typeToClose = TYPE_ALL & ~TYPE_ALL_APPS_EDU;
if (AbstractFloatingView.getTopOpenViewWithType(mLauncher, typeToClose) != null) {
return true;
}
return false;
}
@Override
public final boolean onControllerTouchEvent(MotionEvent ev) {
return mSwipeDetector.onTouchEvent(ev);
}
private float getShiftRange() {
return mLauncher.getDeviceProfile().heightPx;
}
@Override
public void onDragStart(boolean start, float startDisplacement) {
initCurrentAnimation();
}
private void initCurrentAnimation() {
long accuracy = (long) (getShiftRange() * 2);
final PendingAnimation builder = new PendingAnimation(accuracy);
if (mStartState.overviewUi) {
RecentsView recentsView = mLauncher.getOverviewPanel();
AnimatorControllerWithResistance.createRecentsResistanceFromOverviewAnim(mLauncher,
builder);
builder.addOnFrameCallback(recentsView::redrawLiveTile);
AbstractFloatingView.closeOpenContainer(mLauncher, AbstractFloatingView.TYPE_TASK_MENU);
} else if (mStartState == ALL_APPS) {
AllAppsTransitionController allAppsController = mLauncher.getAllAppsController();
builder.setFloat(allAppsController, ALL_APPS_PULL_BACK_TRANSLATION,
-mPullbackDistance, PULLBACK_INTERPOLATOR);
builder.setFloat(allAppsController, ALL_APPS_PULL_BACK_ALPHA,
0.5f, PULLBACK_INTERPOLATOR);
}
AbstractFloatingView topView = AbstractFloatingView.getTopOpenView(mLauncher);
if (topView != null) {
topView.addHintCloseAnim(mPullbackDistance, PULLBACK_INTERPOLATOR, builder);
}
mCurrentAnimation = builder.createPlaybackController();
mCurrentAnimation.getTarget().addListener(newCancelListener(this::clearState));
}
private void clearState() {
mCurrentAnimation = null;
mSwipeDetector.finishedScrolling();
mSwipeDetector.setDetectableScrollConditions(0, false);
}
@Override
public boolean onDrag(float displacement) {
// Only allow swipe up.
displacement = Math.min(0, displacement);
float progress = Utilities.getProgress(displacement, 0, getShiftRange());
mCurrentAnimation.setPlayFraction(progress);
return true;
}
@Override
public void onDragEnd(float velocity) {
boolean fling = mSwipeDetector.isFling(velocity);
float progress = mCurrentAnimation.getProgressFraction();
float interpolatedProgress = PULLBACK_INTERPOLATOR.getInterpolation(progress);
boolean success = interpolatedProgress >= SUCCESS_TRANSITION_PROGRESS
|| (velocity < 0 && fling);
if (success) {
RecentsView recentsView = mLauncher.getOverviewPanel();
recentsView.switchToScreenshot(null,
() -> recentsView.finishRecentsAnimation(true /* toRecents */, null));
if (mStartState.overviewUi) {
new OverviewToHomeAnim(mLauncher, () -> onSwipeInteractionCompleted(mEndState),
FeatureFlags.enableSplitContextually()
? mCancelSplitRunnable
: null)
.animateWithVelocity(velocity);
} else {
mLauncher.getStateManager().goToState(mEndState, true,
forSuccessCallback(() -> onSwipeInteractionCompleted(mEndState)));
}
if (mStartState != mEndState) {
logHomeGesture();
}
AbstractFloatingView topOpenView = AbstractFloatingView.getTopOpenView(mLauncher);
if (topOpenView != null) {
AbstractFloatingView.closeAllOpenViews(mLauncher);
// TODO: add to WW log
}
TaskUtils.closeSystemWindowsAsync(CLOSE_SYSTEM_WINDOWS_REASON_RECENTS);
} else {
// Quickly return to the state we came from (we didn't move far).
ValueAnimator anim = mCurrentAnimation.getAnimationPlayer();
anim.setFloatValues(progress, 0);
anim.addListener(forSuccessCallback(() -> onSwipeInteractionCompleted(mStartState)));
anim.setDuration(80).start();
}
}
private void onSwipeInteractionCompleted(LauncherState targetState) {
clearState();
mLauncher.getStateManager().goToState(targetState, false /* animated */);
AccessibilityManagerCompat.sendStateEventToTest(mLauncher, targetState.ordinal);
}
private void logHomeGesture() {
mLauncher.getStatsLogManager().logger()
.withSrcState(mStartState.statsLogOrdinal)
.withDstState(mEndState.statsLogOrdinal)
.log(LAUNCHER_HOME_GESTURE);
}
}
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