Merge "Removing screenshot based quickstep logic" into ub-launcher3-master

6 files changed, 17 insertions, 628 deletions

diff --git a/quickstep/src/com/android/launcher3/LauncherAppTransitionManagerImpl.java b/quickstep/src/com/android/launcher3/LauncherAppTransitionManagerImpl.java
index 243395d51..8e66526ba 100644
--- a/quickstep/src/com/android/launcher3/LauncherAppTransitionManagerImpl.java
+++ b/quickstep/src/com/android/launcher3/LauncherAppTransitionManagerImpl.java
@@ -807,9 +807,7 @@ public class LauncherAppTransitionManagerImpl extends LauncherAppTransitionManag
                                          Runnable finishedCallback) {
                 Handler handler = mLauncher.getWindow().getDecorView().getHandler();
                 postAtFrontOfQueueAsynchronously(handler, () -> {
-                    if ((Utilities.getPrefs(mLauncher)
-                            .getBoolean("pref_use_screenshot_for_swipe_up", false)
-                            && mLauncher.getStateManager().getState().overviewUi)) {
+                    if (mLauncher.getStateManager().getState().overviewUi) {
                         // We use a separate transition for Overview mode.
                         setCurrentAnimator(null);
                         finishedCallback.run();
diff --git a/quickstep/src/com/android/quickstep/BaseSwipeInteractionHandler.java b/quickstep/src/com/android/quickstep/BaseSwipeInteractionHandler.java
deleted file mode 100644
index 5871a6d59..000000000
--- a/quickstep/src/com/android/quickstep/BaseSwipeInteractionHandler.java
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * Copyright (C) 2018 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.quickstep;
-
-import android.support.annotation.WorkerThread;
-
-import com.android.launcher3.states.InternalStateHandler;
-import com.android.quickstep.TouchConsumer.InteractionType;
-
-public abstract class BaseSwipeInteractionHandler extends InternalStateHandler {
-
-    protected Runnable mGestureEndCallback;
-    protected boolean mIsGoingToHome;
-
-    public void setGestureEndCallback(Runnable gestureEndCallback) {
-        mGestureEndCallback = gestureEndCallback;
-    }
-
-    public void reset() {}
-
-    @WorkerThread
-    public abstract void onGestureStarted();
-
-    @WorkerThread
-    public abstract void onGestureEnded(float endVelocity);
-
-    public abstract void updateInteractionType(@InteractionType int interactionType);
-
-    @WorkerThread
-    public abstract void onQuickScrubEnd();
-
-    @WorkerThread
-    public abstract void onQuickScrubProgress(float progress);
-
-    @WorkerThread
-    public abstract void updateDisplacement(float displacement);
-}
diff --git a/quickstep/src/com/android/quickstep/NavBarSwipeInteractionHandler.java b/quickstep/src/com/android/quickstep/NavBarSwipeInteractionHandler.java
deleted file mode 100644
index 89c9d1611..000000000
--- a/quickstep/src/com/android/quickstep/NavBarSwipeInteractionHandler.java
+++ /dev/null
@@ -1,394 +0,0 @@
-/*
- * 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.quickstep;
-
-
-import static com.android.quickstep.TouchConsumer.INTERACTION_NORMAL;
-import static com.android.quickstep.TouchConsumer.INTERACTION_QUICK_SWITCH;
-import static com.android.quickstep.TouchConsumer.isInteractionQuick;
-
-import android.animation.Animator;
-import android.animation.ObjectAnimator;
-import android.animation.RectEvaluator;
-import android.annotation.TargetApi;
-import android.app.ActivityManager.RunningTaskInfo;
-import android.app.ActivityOptions;
-import android.content.Context;
-import android.content.res.Resources;
-import android.graphics.Bitmap;
-import android.graphics.Rect;
-import android.os.Build;
-import android.support.annotation.UiThread;
-import android.view.View;
-import android.view.ViewTreeObserver.OnPreDrawListener;
-
-import com.android.launcher3.AbstractFloatingView;
-import com.android.launcher3.DeviceProfile;
-import com.android.launcher3.Hotseat;
-import com.android.launcher3.Launcher;
-import com.android.launcher3.Launcher.OnResumeCallback;
-import com.android.launcher3.LauncherAppState;
-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.AnimationSuccessListener;
-import com.android.launcher3.anim.Interpolators;
-import com.android.launcher3.util.Preconditions;
-import com.android.launcher3.util.TraceHelper;
-import com.android.quickstep.TouchConsumer.InteractionType;
-import com.android.quickstep.views.RecentsView;
-import com.android.quickstep.views.TaskView;
-import com.android.systemui.shared.recents.model.RecentsTaskLoadPlan;
-import com.android.systemui.shared.recents.model.Task;
-import com.android.systemui.shared.system.ActivityManagerWrapper;
-import com.android.systemui.shared.system.WindowManagerWrapper;
-
-@TargetApi(Build.VERSION_CODES.O)
-public class NavBarSwipeInteractionHandler extends BaseSwipeInteractionHandler implements
-        OnResumeCallback {
-
-    private static final int STATE_LAUNCHER_READY = 1 << 0;
-    private static final int STATE_ACTIVITY_MULTIPLIER_COMPLETE = 1 << 4;
-    private static final int STATE_SCALED_SNAPSHOT_RECENTS = 1 << 5;
-    private static final int STATE_SCALED_SNAPSHOT_APP = 1 << 6;
-
-    private static final long MAX_SWIPE_DURATION = 200;
-    private static final long MIN_SWIPE_DURATION = 80;
-
-    // Ideal velocity for a smooth transition
-    private static final float PIXEL_PER_MS = 2f;
-
-    private static final float MIN_PROGRESS_FOR_OVERVIEW = 0.5f;
-
-    private final Rect mStableInsets = new Rect();
-    private final Rect mSourceRect = new Rect();
-    private final Rect mTargetRect = new Rect();
-    private final Rect mCurrentRect = new Rect();
-    private final RectEvaluator mRectEvaluator = new RectEvaluator(mCurrentRect);
-
-    // Shift in the range of [0, 1].
-    // 0 => preview snapShot is completely visible, and hotseat is completely translated down
-    // 1 => preview snapShot is completely aligned with the recents view and hotseat is completely
-    // visible.
-    private final AnimatedFloat mCurrentShift = new AnimatedFloat(this::updateFinalShift);
-
-    // Activity multiplier in the range of [0, 1]. When the activity becomes visible, this is
-    // animated to 1, so allow for a smooth transition.
-    private final AnimatedFloat mActivityMultiplier = new AnimatedFloat(this::updateFinalShift);
-
-    private final int mRunningTaskId;
-    private final Context mContext;
-
-    private final MultiStateCallback mStateCallback;
-
-    private Launcher mLauncher;
-    private SnapshotDragView mDragView;
-    private RecentsView mRecentsView;
-    private QuickScrubController mQuickScrubController;
-    private Hotseat mHotseat;
-
-    private boolean mWasLauncherAlreadyVisible;
-
-    private boolean mLauncherReady;
-    private boolean mTouchEndHandled;
-    private float mCurrentDisplacement;
-
-    private @InteractionType int mInteractionType;
-    private boolean mStartedQuickScrubFromHome;
-
-    private Bitmap mTaskSnapshot;
-
-    NavBarSwipeInteractionHandler(RunningTaskInfo runningTaskInfo, Context context,
-            @InteractionType int interactionType) {
-        mContext = context;
-        mInteractionType = interactionType;
-        mRunningTaskId = runningTaskInfo.id;
-        WindowManagerWrapper.getInstance().getStableInsets(mStableInsets);
-
-        DeviceProfile dp = LauncherAppState.getIDP(mContext).getDeviceProfile(mContext);
-        // TODO: If in multi window mode, dp = dp.getMultiWindowProfile()
-        dp = dp.copy(mContext);
-        // TODO: Use different insets for multi-window mode
-        dp.updateInsets(mStableInsets);
-        RecentsView.getPageRect(dp, mContext, mTargetRect);
-        mSourceRect.set(0, 0, dp.widthPx - mStableInsets.left - mStableInsets.right,
-                dp.heightPx - mStableInsets.top - mStableInsets.bottom);
-
-        // Build the state callback
-        mStateCallback = new MultiStateCallback();
-        mStateCallback.addCallback(STATE_LAUNCHER_READY, this::onLauncherReady);
-        mStateCallback.addCallback(STATE_SCALED_SNAPSHOT_APP, this::resumeLastTask);
-        mStateCallback.addCallback(
-                STATE_SCALED_SNAPSHOT_RECENTS | STATE_ACTIVITY_MULTIPLIER_COMPLETE,
-                this::onAnimationToLauncherComplete);
-        mStateCallback.addCallback(STATE_LAUNCHER_READY | STATE_SCALED_SNAPSHOT_APP,
-                this::cleanupLauncher);
-    }
-
-    private void onLauncherReady() {
-        mLauncherReady = true;
-        executeFrameUpdate();
-
-        long duration = Math.min(MAX_SWIPE_DURATION,
-                Math.max((long) (-mCurrentDisplacement / PIXEL_PER_MS), MIN_SWIPE_DURATION));
-        if (mCurrentShift.getCurrentAnimation() != null) {
-            ObjectAnimator anim = mCurrentShift.getCurrentAnimation();
-            long theirDuration = anim.getDuration() - anim.getCurrentPlayTime();
-
-            // TODO: Find a better heuristic
-            duration = (duration + theirDuration) / 2;
-        }
-        ObjectAnimator anim = mActivityMultiplier.animateToValue(1)
-                .setDuration(duration);
-        anim.addListener(new AnimationSuccessListener() {
-            @Override
-            public void onAnimationSuccess(Animator animator) {
-                mStateCallback.setState(STATE_ACTIVITY_MULTIPLIER_COMPLETE);
-            }
-        });
-        anim.start();
-    }
-
-    public void setTaskSnapshot(Bitmap taskSnapshot) {
-        mTaskSnapshot = taskSnapshot;
-    }
-
-    @Override
-    public void onLauncherResume() {
-        TraceHelper.partitionSection("TouchInt", "Launcher On resume");
-        mDragView.getViewTreeObserver().addOnPreDrawListener(new OnPreDrawListener() {
-            @Override
-            public boolean onPreDraw() {
-                mDragView.getViewTreeObserver().removeOnPreDrawListener(this);
-                mStateCallback.setState(STATE_LAUNCHER_READY);
-                TraceHelper.partitionSection("TouchInt", "Launcher drawn");
-                return true;
-            }
-        });
-    }
-
-    @Override
-    protected boolean init(Launcher launcher, boolean alreadyOnHome) {
-        launcher.setOnResumeCallback(this);
-        mLauncher = launcher;
-        mRecentsView = launcher.getOverviewPanel();
-        mRecentsView.showTask(mRunningTaskId);
-        mHotseat = mLauncher.getHotseat();
-        mWasLauncherAlreadyVisible = alreadyOnHome;
-
-        AbstractFloatingView.closeAllOpenViews(mLauncher, alreadyOnHome);
-        mLauncher.getStateManager().goToState(LauncherState.OVERVIEW, alreadyOnHome);
-
-        mDragView = new SnapshotDragView(mLauncher, mTaskSnapshot);
-        mLauncher.getDragLayer().addView(mDragView);
-        mDragView.setPivotX(0);
-        mDragView.setPivotY(0);
-
-        if (isInteractionQuick(mInteractionType)) {
-            updateUiForQuickScrub();
-        }
-
-        // Optimization
-        if (!mLauncher.getDeviceProfile().isVerticalBarLayout()) {
-            // All-apps search box is visible in vertical bar layout.
-            mLauncher.getAppsView().setVisibility(View.GONE);
-        }
-        TraceHelper.partitionSection("TouchInt", "Launcher on new intent");
-        return false;
-    }
-
-    public void updateInteractionType(@InteractionType int interactionType) {
-        Preconditions.assertUIThread();
-        if (mInteractionType != INTERACTION_NORMAL) {
-            throw new IllegalArgumentException(
-                    "Can't change interaction type from " + mInteractionType);
-        }
-        if (!isInteractionQuick(interactionType)) {
-            throw new IllegalArgumentException(
-                    "Can't change interaction type to " + interactionType);
-        }
-        mInteractionType = interactionType;
-
-        if (mLauncher != null) {
-            updateUiForQuickScrub();
-        }
-    }
-
-    private void updateUiForQuickScrub() {
-        mStartedQuickScrubFromHome = mWasLauncherAlreadyVisible;
-        mQuickScrubController = mRecentsView.getQuickScrubController();
-        mQuickScrubController.onQuickScrubStart(mStartedQuickScrubFromHome);
-        animateToProgress(1f, MAX_SWIPE_DURATION);
-        if (mStartedQuickScrubFromHome) {
-            mDragView.setVisibility(View.INVISIBLE);
-        }
-    }
-
-    @UiThread
-    public void updateDisplacement(float displacement) {
-        mCurrentDisplacement = displacement;
-        executeFrameUpdate();
-    }
-
-    private void executeFrameUpdate() {
-        if (mLauncherReady) {
-            final float displacement = -mCurrentDisplacement;
-            int hotseatSize = getHotseatSize();
-            float translation = Utilities.boundToRange(displacement, 0, hotseatSize);
-            float shift = hotseatSize == 0 ? 0 : translation / hotseatSize;
-            mCurrentShift.updateValue(shift);
-        }
-    }
-
-    @UiThread
-    private void updateFinalShift() {
-        if (!mLauncherReady || mStartedQuickScrubFromHome) {
-            return;
-        }
-
-        float shift = mCurrentShift.value * mActivityMultiplier.value;
-
-        AllAppsTransitionController controller = mLauncher.getAllAppsController();
-        float range = getHotseatSize() / controller.getShiftRange();
-        controller.setProgress(1 + (1 - shift) * range);
-
-        mRectEvaluator.evaluate(shift, mSourceRect, mTargetRect);
-
-        float scale = (float) mCurrentRect.width() / mSourceRect.width();
-        mDragView.setTranslationX(mCurrentRect.left - mStableInsets.left * scale * shift);
-        mDragView.setTranslationY(mCurrentRect.top - mStableInsets.top * scale * shift);
-        mDragView.setScaleX(scale);
-        mDragView.setScaleY(scale);
-        //  TODO: mDragView.getViewBounds().setClipLeft((int) (mStableInsets.left * shift));
-        mDragView.getViewBounds().setClipTop((int) (mStableInsets.top * shift));
-        // TODO: mDragView.getViewBounds().setClipRight((int) (mStableInsets.right * shift));
-        mDragView.getViewBounds().setClipBottom((int) (mStableInsets.bottom * shift));
-    }
-
-    private int getHotseatSize() {
-        return mLauncher.getDeviceProfile().isVerticalBarLayout()
-                ? mHotseat.getWidth() : mHotseat.getHeight();
-    }
-
-    @Override
-    public void onGestureStarted() { }
-
-    @UiThread
-    public void onGestureEnded(float endVelocity) {
-        if (mTouchEndHandled) {
-            return;
-        }
-        mTouchEndHandled = true;
-
-        Resources res = mContext.getResources();
-        float flingThreshold = res.getDimension(R.dimen.quickstep_fling_threshold_velocity);
-        boolean isFling = Math.abs(endVelocity) > flingThreshold;
-
-        long duration = MAX_SWIPE_DURATION;
-        final float endShift;
-        if (!isFling) {
-            endShift = mCurrentShift.value >= MIN_PROGRESS_FOR_OVERVIEW ? 1 : 0;
-        } else {
-            endShift = endVelocity < 0 ? 1 : 0;
-            float minFlingVelocity = res.getDimension(R.dimen.quickstep_fling_min_velocity);
-            if (Math.abs(endVelocity) > minFlingVelocity && mLauncherReady) {
-                float distanceToTravel = (endShift - mCurrentShift.value) * getHotseatSize();
-
-                // we want the page's snap velocity to approximately match the velocity at
-                // which the user flings, so we scale the duration by a value near to the
-                // derivative of the scroll interpolator at zero, ie. 5.
-                duration = 5 * Math.round(1000 * Math.abs(distanceToTravel / endVelocity));
-            }
-        }
-
-        animateToProgress(endShift, duration);
-    }
-
-    /** Animates to the given progress, where 0 is the current app and 1 is overview. */
-    private void animateToProgress(float progress, long duration) {
-        mIsGoingToHome = Float.compare(progress, 1) == 0;
-        ObjectAnimator anim = mCurrentShift.animateToValue(progress).setDuration(duration);
-        anim.setInterpolator(Interpolators.SCROLL);
-        anim.addListener(new AnimationSuccessListener() {
-            @Override
-            public void onAnimationSuccess(Animator animator) {
-                mStateCallback.setState(mIsGoingToHome
-                        ? STATE_SCALED_SNAPSHOT_RECENTS : STATE_SCALED_SNAPSHOT_APP);
-            }
-        });
-        anim.start();
-    }
-
-    @UiThread
-    private void resumeLastTask() {
-        RecentsTaskLoadPlan loadPlan = RecentsModel.getInstance(mContext).getLastLoadPlan();
-        if (loadPlan != null) {
-            Task task = loadPlan.getTaskStack().findTaskWithId(mRunningTaskId);
-            if (task != null) {
-                ActivityOptions opts = ActivityOptions.makeCustomAnimation(mContext, 0, 0);
-                ActivityManagerWrapper.getInstance().startActivityFromRecentsAsync(task.key, opts,
-                        null, null);
-            }
-        }
-    }
-
-    public void reset() {
-        mCurrentShift.cancelAnimation();
-        if (mGestureEndCallback != null) {
-            mGestureEndCallback.run();
-        }
-    }
-
-    private void cleanupLauncher() {
-        reset();
-
-        // TODO: These should be done as part of ActivityOptions#OnAnimationStarted
-        mLauncher.getStateManager().reapplyState();
-        mLauncher.setOnResumeCallback(() -> mDragView.close(false));
-    }
-
-    private void onAnimationToLauncherComplete() {
-        reset();
-
-        mDragView.close(false);
-        View currentRecentsPage = mRecentsView.getPageAt(mRecentsView.getCurrentPage());
-        if (currentRecentsPage instanceof TaskView) {
-            ((TaskView) currentRecentsPage).animateIconToScale(1f);
-        }
-        if (mInteractionType == INTERACTION_QUICK_SWITCH) {
-            if (mQuickScrubController != null) {
-                mQuickScrubController.onQuickSwitch();
-            }
-        }
-    }
-
-    public void onQuickScrubEnd() {
-        if (mQuickScrubController != null) {
-            mQuickScrubController.onQuickScrubEnd();
-        } else {
-            // TODO:
-        }
-    }
-
-    public void onQuickScrubProgress(float progress) {
-        if (mQuickScrubController != null) {
-            mQuickScrubController.onQuickScrubProgress(progress);
-        } else {
-            // TODO:
-        }
-    }
-}
diff --git a/quickstep/src/com/android/quickstep/OtherActivityTouchConsumer.java b/quickstep/src/com/android/quickstep/OtherActivityTouchConsumer.java
index 93e4cc949..69e7933b9 100644
--- a/quickstep/src/com/android/quickstep/OtherActivityTouchConsumer.java
+++ b/quickstep/src/com/android/quickstep/OtherActivityTouchConsumer.java
@@ -22,27 +22,20 @@ import static android.view.MotionEvent.ACTION_POINTER_UP;
 import static android.view.MotionEvent.ACTION_UP;
 import static android.view.MotionEvent.INVALID_POINTER_ID;
 
-import static com.android.quickstep.RemoteRunnable.executeSafely;
 import static com.android.quickstep.TouchInteractionService.DEBUG_SHOW_OVERVIEW_BUTTON;
 import static com.android.systemui.shared.system.NavigationBarCompat.HIT_TARGET_BACK;
 import static com.android.systemui.shared.system.NavigationBarCompat.HIT_TARGET_OVERVIEW;
 
 import android.annotation.TargetApi;
 import android.app.ActivityManager.RunningTaskInfo;
-import android.app.ActivityOptions;
 import android.content.Context;
 import android.content.ContextWrapper;
 import android.content.Intent;
-import android.graphics.Bitmap;
-import android.graphics.Bitmap.Config;
-import android.graphics.Color;
-import android.graphics.Point;
 import android.graphics.PointF;
 import android.graphics.Rect;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Looper;
-import android.util.Log;
 import android.view.Choreographer;
 import android.view.Display;
 import android.view.MotionEvent;
@@ -52,7 +45,6 @@ import android.view.ViewConfiguration;
 import android.view.WindowManager;
 
 import com.android.launcher3.MainThreadExecutor;
-import com.android.launcher3.Utilities;
 import com.android.launcher3.util.TraceHelper;
 import com.android.systemui.shared.recents.ISystemUiProxy;
 import com.android.systemui.shared.system.ActivityManagerWrapper;
@@ -73,7 +65,6 @@ import java.util.concurrent.TimeUnit;
  */
 @TargetApi(Build.VERSION_CODES.P)
 public class OtherActivityTouchConsumer extends ContextWrapper implements TouchConsumer {
-    private static final String TAG = "ActivityTouchConsumer";
 
     private static final long LAUNCHER_DRAW_TIMEOUT_MS = 150;
     private static final int[] DEFERRED_HIT_TARGETS = DEBUG_SHOW_OVERVIEW_BUTTON
@@ -93,7 +84,7 @@ public class OtherActivityTouchConsumer extends ContextWrapper implements TouchC
     private boolean mTouchThresholdCrossed;
     private int mTouchSlop;
     private float mStartDisplacement;
-    private BaseSwipeInteractionHandler mInteractionHandler;
+    private WindowTransformSwipeHandler mInteractionHandler;
     private int mDisplayRotation;
     private Rect mStableInsets = new Rect();
 
@@ -132,7 +123,7 @@ public class OtherActivityTouchConsumer extends ContextWrapper implements TouchC
 
                 // Start the window animation on down to give more time for launcher to draw if the
                 // user didn't start the gesture over the back button
-                if (!isUsingScreenShot() && !mIsDeferredDownTarget) {
+                if (!mIsDeferredDownTarget) {
                     startTouchTrackingForWindowAnimation(ev.getEventTime());
                 }
 
@@ -172,14 +163,11 @@ public class OtherActivityTouchConsumer extends ContextWrapper implements TouchC
                     if (mTouchThresholdCrossed) {
                         mStartDisplacement = Math.signum(displacement) * mTouchSlop;
 
-                        if (isUsingScreenShot()) {
-                            startTouchTrackingForScreenshotAnimation();
-                        } else if (mIsDeferredDownTarget) {
+                        if (mIsDeferredDownTarget) {
                             // If we deferred starting the window animation on touch down, then
                             // start tracking now
                             startTouchTrackingForWindowAnimation(ev.getEventTime());
                         }
-
                         notifyGestureStarted();
                     }
                 } else if (mInteractionHandler != null) {
@@ -215,65 +203,6 @@ public class OtherActivityTouchConsumer extends ContextWrapper implements TouchC
         return mDisplayRotation == Surface.ROTATION_270 && mStableInsets.left > 0;
     }
 
-    private boolean isUsingScreenShot() {
-        return Utilities.getPrefs(this).getBoolean("pref_use_screenshot_for_swipe_up", false);
-    }
-
-    /**
-     * Called when the gesture has started.
-     */
-    private void startTouchTrackingForScreenshotAnimation() {
-        // Create the shared handler
-        final NavBarSwipeInteractionHandler handler =
-                new NavBarSwipeInteractionHandler(mRunningTask, this, INTERACTION_NORMAL);
-
-        TraceHelper.partitionSection("TouchInt", "Thershold crossed ");
-
-        // Start the recents activity on a background thread
-        BackgroundExecutor.get().submit(() -> {
-            // Get the snap shot before
-            handler.setTaskSnapshot(getCurrentTaskSnapshot());
-
-            // Start the launcher activity with our custom handler
-            Intent homeIntent = handler.addToIntent(new Intent(mHomeIntent));
-            startActivity(homeIntent, ActivityOptions.makeCustomAnimation(this, 0, 0).toBundle());
-            TraceHelper.partitionSection("TouchInt", "Home started");
-        });
-
-        // Preload the plan
-        mRecentsModel.loadTasks(mRunningTask.id, null);
-        mInteractionHandler = handler;
-        mInteractionHandler.setGestureEndCallback(mEventQueue::reset);
-    }
-
-    private Bitmap getCurrentTaskSnapshot() {
-        TraceHelper.beginSection("TaskSnapshot");
-        // TODO: We are using some hardcoded layers for now, to best approximate the activity layers
-        Point displaySize = new Point();
-        Display display = getSystemService(WindowManager.class).getDefaultDisplay();
-        display.getRealSize(displaySize);
-        int rotation = display.getRotation();
-        // The rotation is backwards in landscape, so flip it.
-        if (rotation == Surface.ROTATION_270) {
-            rotation = Surface.ROTATION_90;
-        } else if (rotation == Surface.ROTATION_90) {
-            rotation = Surface.ROTATION_270;
-        }
-        try {
-            return mISystemUiProxy.screenshot(new Rect(), displaySize.x, displaySize.y, 0, 100000,
-                    false, rotation).toBitmap();
-        } catch (Exception e) {
-            Log.e(TAG, "Error capturing snapshot", e);
-
-            // Return a dummy bitmap
-            Bitmap bitmap = Bitmap.createBitmap(displaySize.x, displaySize.y, Config.RGB_565);
-            bitmap.eraseColor(Color.WHITE);
-            return bitmap;
-        } finally {
-            TraceHelper.endSection("TaskSnapshot");
-        }
-    }
-
     private void startTouchTrackingForWindowAnimation(long touchTimeMs) {
         // Create the shared handler
         final WindowTransformSwipeHandler handler =
@@ -353,7 +282,7 @@ public class OtherActivityTouchConsumer extends ContextWrapper implements TouchC
                     : isNavBarOnLeft() ? -mVelocityTracker.getXVelocity(mActivePointerId)
                             : mVelocityTracker.getYVelocity(mActivePointerId);
             mInteractionHandler.onGestureEnded(velocity);
-        } else if (!isUsingScreenShot()) {
+        } else {
             // Since we start touch tracking on DOWN, we may reach this state without actually
             // starting the gesture. In that case, just cleanup immediately.
             reset();
@@ -370,7 +299,7 @@ public class OtherActivityTouchConsumer extends ContextWrapper implements TouchC
     public void reset() {
         // Clean up the old interaction handler
         if (mInteractionHandler != null) {
-            final BaseSwipeInteractionHandler handler = mInteractionHandler;
+            final WindowTransformSwipeHandler handler = mInteractionHandler;
             mInteractionHandler = null;
             mIsGoingToHome = handler.mIsGoingToHome;
             mMainThreadExecutor.execute(handler::reset);
@@ -380,24 +309,15 @@ public class OtherActivityTouchConsumer extends ContextWrapper implements TouchC
     @Override
     public void updateTouchTracking(int interactionType) {
         notifyGestureStarted();
-
-        if (isUsingScreenShot()) {
-            mMainThreadExecutor.execute(() -> {
-                if (mInteractionHandler != null) {
-                    mInteractionHandler.updateInteractionType(interactionType);
-                }
-            });
-        } else {
-            if (mInteractionHandler != null) {
-                mInteractionHandler.updateInteractionType(interactionType);
-            }
+        if (mInteractionHandler != null) {
+            mInteractionHandler.updateInteractionType(interactionType);
         }
     }
 
     @Override
     public Choreographer getIntrimChoreographer(MotionEventQueue queue) {
         mEventQueue = queue;
-        return isUsingScreenShot() ? null : mBackgroundThreadChoreographer;
+        return mBackgroundThreadChoreographer;
     }
 
     @Override
diff --git a/quickstep/src/com/android/quickstep/SnapshotDragView.java b/quickstep/src/com/android/quickstep/SnapshotDragView.java
deleted file mode 100644
index 2ef39422d..000000000
--- a/quickstep/src/com/android/quickstep/SnapshotDragView.java
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- * 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.quickstep;
-
-import android.graphics.Bitmap;
-import android.graphics.Canvas;
-import android.graphics.Rect;
-import android.view.MotionEvent;
-
-import com.android.launcher3.AbstractFloatingView;
-import com.android.launcher3.Insettable;
-import com.android.launcher3.Launcher;
-import com.android.systemui.shared.recents.view.AnimateableViewBounds;
-
-/**
- * Floating view which shows the task snapshot allowing it to be dragged and placed.
- */
-public class SnapshotDragView extends AbstractFloatingView implements Insettable {
-
-    private final Launcher mLauncher;
-    private final Bitmap mSnapshot;
-    private final AnimateableViewBounds mViewBounds;
-
-    public SnapshotDragView(Launcher launcher, Bitmap snapshot) {
-        super(launcher, null);
-        mLauncher = launcher;
-        mSnapshot = snapshot;
-        mViewBounds = new AnimateableViewBounds(this, 0);
-        setWillNotDraw(false);
-        setClipToOutline(true);
-        setOutlineProvider(mViewBounds);
-    }
-
-    AnimateableViewBounds getViewBounds() {
-        return mViewBounds;
-    }
-
-    @Override
-    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
-        if (mSnapshot != null) {
-            setMeasuredDimension(mSnapshot.getWidth(), mSnapshot.getHeight());
-        } else {
-            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
-        }
-    }
-
-    @Override
-    public void setInsets(Rect insets) {
-
-    }
-
-    @Override
-    protected void onDraw(Canvas canvas) {
-        if (mSnapshot != null) {
-            canvas.drawBitmap(mSnapshot, 0, 0, null);
-        }
-    }
-
-    @Override
-    public boolean onControllerInterceptTouchEvent(MotionEvent ev) {
-        return false;
-    }
-
-    @Override
-    protected void handleClose(boolean animate) {
-        // We dont suupport animate.
-        mLauncher.getDragLayer().removeView(this);
-    }
-
-    @Override
-    public void logActionCommand(int command) {
-        // We should probably log the weather
-    }
-
-    @Override
-    protected boolean isOfType(int type) {
-        return (type & TYPE_QUICKSTEP_PREVIEW) != 0;
-    }
-}
diff --git a/quickstep/src/com/android/quickstep/WindowTransformSwipeHandler.java b/quickstep/src/com/android/quickstep/WindowTransformSwipeHandler.java
index acf5db029..060d680fd 100644
--- a/quickstep/src/com/android/quickstep/WindowTransformSwipeHandler.java
+++ b/quickstep/src/com/android/quickstep/WindowTransformSwipeHandler.java
@@ -65,6 +65,7 @@ import com.android.launcher3.anim.AnimationSuccessListener;
 import com.android.launcher3.anim.AnimatorPlaybackController;
 import com.android.launcher3.anim.Interpolators;
 import com.android.launcher3.logging.UserEventDispatcher;
+import com.android.launcher3.states.InternalStateHandler;
 import com.android.launcher3.userevent.nano.LauncherLogProto.Action.Direction;
 import com.android.launcher3.userevent.nano.LauncherLogProto.Action.Touch;
 import com.android.launcher3.userevent.nano.LauncherLogProto.ContainerType;
@@ -119,7 +120,7 @@ class MetricsLogger {
 }
 
 @TargetApi(Build.VERSION_CODES.O)
-public class WindowTransformSwipeHandler extends BaseSwipeInteractionHandler {
+public class WindowTransformSwipeHandler extends InternalStateHandler {
     private static final String TAG = WindowTransformSwipeHandler.class.getSimpleName();
     private static final boolean DEBUG_STATES = false;
 
@@ -193,6 +194,8 @@ public class WindowTransformSwipeHandler extends BaseSwipeInteractionHandler {
     // The clip rect in source app window coordinates
     private final Rect mClipRect = new Rect();
     private final RectFEvaluator mRectFEvaluator = new RectFEvaluator();
+    protected Runnable mGestureEndCallback;
+    protected boolean mIsGoingToHome;
     private DeviceProfile mDp;
     private int mTransitionDragLength;
 
@@ -895,4 +898,8 @@ public class WindowTransformSwipeHandler extends BaseSwipeInteractionHandler {
         Log.d(TAG, "[" + System.identityHashCode(this) + "] Adding " + stateFlagStr + " to "
                 + currentStateStr);
     }
+
+    public void setGestureEndCallback(Runnable gestureEndCallback) {
+        mGestureEndCallback = gestureEndCallback;
+    }
 }