Improving drag and drop animations.

- Expanding drop targets to indicate the size of the to-be docked window
- Fixing animation when dropping task
- Fixing drag view z order
- Fixes issue where the dock divider position in WM is not exact
- Requiring user to move the slop distance before accepting drops

Change-Id: I2f6eab504db7126c19e0c680629e89a39e7512e3
diff --git a/packages/SystemUI/src/com/android/systemui/recents/RecentsConfiguration.java b/packages/SystemUI/src/com/android/systemui/recents/RecentsConfiguration.java
index 67135d5..61780f8 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/RecentsConfiguration.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/RecentsConfiguration.java
@@ -139,7 +139,7 @@
         } else {
             // In portrait, the search bar appears on the top (which already has the inset)
             int top = searchBarBounds.isEmpty() ? topInset : 0;
-            taskStackBounds.set(windowBounds.left, searchBarBounds.bottom + top,
+            taskStackBounds.set(windowBounds.left, windowBounds.top + searchBarBounds.bottom + top,
                     windowBounds.right - rightInset, windowBounds.bottom);
         }
     }
diff --git a/packages/SystemUI/src/com/android/systemui/recents/events/ui/dragndrop/DragDropTargetChangedEvent.java b/packages/SystemUI/src/com/android/systemui/recents/events/ui/dragndrop/DragDropTargetChangedEvent.java
index 21321f2..b85ddac 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/events/ui/dragndrop/DragDropTargetChangedEvent.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/events/ui/dragndrop/DragDropTargetChangedEvent.java
@@ -25,6 +25,7 @@
  */
 public class DragDropTargetChangedEvent extends EventBus.Event {
 
+    // The task that is currently being dragged
     public final Task task;
     public final DropTarget dropTarget;
 
diff --git a/packages/SystemUI/src/com/android/systemui/recents/misc/SystemServicesProxy.java b/packages/SystemUI/src/com/android/systemui/recents/misc/SystemServicesProxy.java
index f9e825a..e05a6f8f 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/misc/SystemServicesProxy.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/misc/SystemServicesProxy.java
@@ -307,11 +307,12 @@
     }
 
     /** Docks a task to the side of the screen and starts it. */
-    public void startTaskInDockedMode(int taskId, int createMode) {
+    public void startTaskInDockedMode(Context context, int taskId, int createMode) {
         if (mIam == null) return;
 
         try {
-            final ActivityOptions options = ActivityOptions.makeBasic();
+            // TODO: Determine what animation we want for the incoming task
+            final ActivityOptions options = ActivityOptions.makeCustomAnimation(context, 0, 0);
             options.setDockCreateMode(createMode);
             options.setLaunchStackId(DOCKED_STACK_ID);
             mIam.startActivityFromRecents(taskId, options.toBundle());
@@ -917,6 +918,18 @@
         }
     }
 
+    /**
+     * Calculates the size of the dock divider in the current orientation.
+     */
+    public int getDockedDividerSize(Context context) {
+        Resources res = context.getResources();
+        int dividerWindowWidth = res.getDimensionPixelSize(
+                com.android.internal.R.dimen.docked_stack_divider_thickness);
+        int dividerInsets = res.getDimensionPixelSize(
+                com.android.internal.R.dimen.docked_stack_divider_insets);
+        return dividerWindowWidth - 2 * dividerInsets;
+    }
+
     public void requestKeyboardShortcuts(Context context, KeyboardShortcutsReceiver receiver) {
         mWm.requestAppKeyboardShortcuts(receiver);
     }
diff --git a/packages/SystemUI/src/com/android/systemui/recents/misc/Utilities.java b/packages/SystemUI/src/com/android/systemui/recents/misc/Utilities.java
index 2bf2ccb..33f116b 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/misc/Utilities.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/misc/Utilities.java
@@ -18,13 +18,43 @@
 
 import android.animation.Animator;
 import android.graphics.Color;
+import android.graphics.Rect;
 import android.graphics.RectF;
+import android.graphics.drawable.Drawable;
+import android.util.IntProperty;
+import android.util.Property;
 import android.view.View;
 import android.view.ViewParent;
 
 /* Common code */
 public class Utilities {
 
+    public static final Property<Drawable, Integer> DRAWABLE_ALPHA =
+            new IntProperty<Drawable>("drawableAlpha") {
+                @Override
+                public void setValue(Drawable object, int alpha) {
+                    object.setAlpha(alpha);
+                }
+
+                @Override
+                public Integer get(Drawable object) {
+                    return object.getAlpha();
+                }
+            };
+
+    public static final Property<Drawable, Rect> DRAWABLE_RECT =
+            new Property<Drawable, Rect>(Rect.class, "drawableBounds") {
+                @Override
+                public void set(Drawable object, Rect bounds) {
+                    object.setBounds(bounds);
+                }
+
+                @Override
+                public Rect get(Drawable object) {
+                    return object.getBounds();
+                }
+            };
+
     /**
      * @return the first parent walking up the view hierarchy that has the given class type.
      *
diff --git a/packages/SystemUI/src/com/android/systemui/recents/model/TaskStack.java b/packages/SystemUI/src/com/android/systemui/recents/model/TaskStack.java
index 856200d..e97188b 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/model/TaskStack.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/model/TaskStack.java
@@ -16,16 +16,25 @@
 
 package com.android.systemui.recents.model;
 
+import android.animation.Animator;
+import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
+import android.animation.PropertyValuesHolder;
+import android.animation.RectEvaluator;
 import android.content.ComponentName;
 import android.content.Context;
+import android.content.res.Configuration;
+import android.content.res.Resources;
 import android.graphics.Color;
 import android.graphics.Rect;
 import android.graphics.RectF;
 import android.graphics.drawable.ColorDrawable;
 import android.util.SparseArray;
+import android.view.animation.Interpolator;
+import com.android.internal.policy.DockedDividerUtils;
 import com.android.systemui.R;
 import com.android.systemui.recents.Recents;
+import com.android.systemui.recents.RecentsConfiguration;
 import com.android.systemui.recents.RecentsDebugFlags;
 import com.android.systemui.recents.misc.NamedCounter;
 import com.android.systemui.recents.misc.SystemServicesProxy;
@@ -44,6 +53,11 @@
 import static android.app.ActivityManager.DOCKED_STACK_CREATE_MODE_TOP_OR_LEFT;
 import static android.app.ActivityManager.StackId.FREEFORM_WORKSPACE_STACK_ID;
 import static android.app.ActivityManager.StackId.FULLSCREEN_WORKSPACE_STACK_ID;
+import static android.view.WindowManager.DOCKED_LEFT;
+import static android.view.WindowManager.DOCKED_RIGHT;
+import static android.view.WindowManager.DOCKED_TOP;
+import static android.view.WindowManager.DOCKED_BOTTOM;
+import static android.view.WindowManager.DOCKED_INVALID;
 
 
 /**
@@ -229,30 +243,36 @@
     public static class DockState implements DropTarget {
 
         private static final int DOCK_AREA_ALPHA = 192;
-        public static final DockState NONE = new DockState(-1, 96, null, null);
-        public static final DockState LEFT = new DockState(
+        public static final DockState NONE = new DockState(DOCKED_INVALID, -1, 80, null, null, null);
+        public static final DockState LEFT = new DockState(DOCKED_LEFT,
                 DOCKED_STACK_CREATE_MODE_TOP_OR_LEFT, DOCK_AREA_ALPHA,
-                new RectF(0, 0, 0.15f, 1), new RectF(0, 0, 0.15f, 1));
-        public static final DockState TOP = new DockState(
+                new RectF(0, 0, 0.125f, 1), new RectF(0, 0, 0.125f, 1),
+                new RectF(0, 0, 0.5f, 1));
+        public static final DockState TOP = new DockState(DOCKED_TOP,
                 DOCKED_STACK_CREATE_MODE_TOP_OR_LEFT, DOCK_AREA_ALPHA,
-                new RectF(0, 0, 1, 0.15f), new RectF(0, 0, 1, 0.15f));
-        public static final DockState RIGHT = new DockState(
+                new RectF(0, 0, 1, 0.125f), new RectF(0, 0, 1, 0.125f),
+                new RectF(0, 0, 1, 0.5f));
+        public static final DockState RIGHT = new DockState(DOCKED_RIGHT,
                 DOCKED_STACK_CREATE_MODE_BOTTOM_OR_RIGHT, DOCK_AREA_ALPHA,
-                new RectF(0.85f, 0, 1, 1), new RectF(0.85f, 0, 1, 1));
-        public static final DockState BOTTOM = new DockState(
+                new RectF(0.875f, 0, 1, 1), new RectF(0.875f, 0, 1, 1),
+                new RectF(0.5f, 0, 1, 1));
+        public static final DockState BOTTOM = new DockState(DOCKED_BOTTOM,
                 DOCKED_STACK_CREATE_MODE_BOTTOM_OR_RIGHT, DOCK_AREA_ALPHA,
-                new RectF(0, 0.85f, 1, 1), new RectF(0, 0.85f, 1, 1));
+                new RectF(0, 0.875f, 1, 1), new RectF(0, 0.875f, 1, 1),
+                new RectF(0, 0.5f, 1, 1));
 
         @Override
-        public boolean acceptsDrop(int x, int y, int width, int height) {
-            return touchAreaContainsPoint(width, height, x, y);
+        public boolean acceptsDrop(int x, int y, int width, int height, boolean isCurrentTarget) {
+            return isCurrentTarget
+                    ? areaContainsPoint(expandedTouchDockArea, width, height, x, y)
+                    : areaContainsPoint(touchArea, width, height, x, y);
         }
 
         // Represents the view state of this dock state
         public class ViewState {
             public final int dockAreaAlpha;
             public final ColorDrawable dockAreaOverlay;
-            private ObjectAnimator dockAreaOverlayAnimator;
+            private AnimatorSet dockAreaOverlayAnimator;
 
             private ViewState(int alpha) {
                 dockAreaAlpha = alpha;
@@ -261,56 +281,130 @@
             }
 
             /**
-             * Creates a new alpha animation.
+             * Creates a new bounds and alpha animation.
              */
-            public void startAlphaAnimation(int alpha, int duration) {
+            public void startAnimation(Rect bounds, int alpha, int duration,
+                    Interpolator interpolator, boolean animateAlpha, boolean animateBounds) {
+                if (dockAreaOverlayAnimator != null) {
+                    dockAreaOverlayAnimator.cancel();
+                }
+
+                ArrayList<Animator> animators = new ArrayList<>();
                 if (dockAreaOverlay.getAlpha() != alpha) {
-                    if (dockAreaOverlayAnimator != null) {
-                        dockAreaOverlayAnimator.cancel();
+                    if (animateAlpha) {
+                        animators.add(ObjectAnimator.ofInt(dockAreaOverlay,
+                                Utilities.DRAWABLE_ALPHA, dockAreaOverlay.getAlpha(), alpha));
+                    } else {
+                        dockAreaOverlay.setAlpha(alpha);
                     }
-                    dockAreaOverlayAnimator = ObjectAnimator.ofInt(dockAreaOverlay, "alpha", alpha);
+                }
+                if (bounds != null && !dockAreaOverlay.getBounds().equals(bounds)) {
+                    if (animateBounds) {
+                        PropertyValuesHolder prop = PropertyValuesHolder.ofObject(
+                                Utilities.DRAWABLE_RECT, new RectEvaluator(new Rect()),
+                                dockAreaOverlay.getBounds(), bounds);
+                        animators.add(ObjectAnimator.ofPropertyValuesHolder(dockAreaOverlay, prop));
+                    } else {
+                        dockAreaOverlay.setBounds(bounds);
+                    }
+                }
+                if (!animators.isEmpty()) {
+                    dockAreaOverlayAnimator = new AnimatorSet();
+                    dockAreaOverlayAnimator.playTogether(animators);
                     dockAreaOverlayAnimator.setDuration(duration);
+                    dockAreaOverlayAnimator.setInterpolator(interpolator);
                     dockAreaOverlayAnimator.start();
                 }
             }
         }
 
+        public final int dockSide;
         public final int createMode;
         public final ViewState viewState;
-        private final RectF dockArea;
         private final RectF touchArea;
+        private final RectF dockArea;
+        private final RectF expandedTouchDockArea;
 
         /**
          * @param createMode used to pass to ActivityManager to dock the task
          * @param touchArea the area in which touch will initiate this dock state
          * @param dockArea the visible dock area
+         * @param expandedTouchDockArea the areain which touch will continue to dock after entering
+         *                              the initial touch area.  This is also the new dock area to
+         *                              draw.
          */
-        DockState(int createMode, int dockAreaAlpha, RectF touchArea, RectF dockArea) {
+        DockState(int dockSide, int createMode, int dockAreaAlpha, RectF touchArea, RectF dockArea,
+                  RectF expandedTouchDockArea) {
+            this.dockSide = dockSide;
             this.createMode = createMode;
             this.viewState = new ViewState(dockAreaAlpha);
             this.dockArea = dockArea;
             this.touchArea = touchArea;
+            this.expandedTouchDockArea = expandedTouchDockArea;
         }
 
         /**
-         * Returns whether {@param x} and {@param y} are contained in the touch area scaled to the
+         * Returns whether {@param x} and {@param y} are contained in the area scaled to the
          * given {@param width} and {@param height}.
          */
-        public boolean touchAreaContainsPoint(int width, int height, float x, float y) {
-            int left = (int) (touchArea.left * width);
-            int top = (int) (touchArea.top * height);
-            int right = (int) (touchArea.right * width);
-            int bottom = (int) (touchArea.bottom * height);
+        public boolean areaContainsPoint(RectF area, int width, int height, float x, float y) {
+            int left = (int) (area.left * width);
+            int top = (int) (area.top * height);
+            int right = (int) (area.right * width);
+            int bottom = (int) (area.bottom * height);
             return x >= left && y >= top && x <= right && y <= bottom;
         }
 
         /**
          * Returns the docked task bounds with the given {@param width} and {@param height}.
          */
-        public Rect getDockedBounds(int width, int height) {
+        public Rect getPreDockedBounds(int width, int height) {
             return new Rect((int) (dockArea.left * width), (int) (dockArea.top * height),
                     (int) (dockArea.right * width), (int) (dockArea.bottom * height));
         }
+
+        /**
+         * Returns the expanded docked task bounds with the given {@param width} and
+         * {@param height}.
+         */
+        public Rect getDockedBounds(int width, int height, int dividerSize, Rect insets,
+                Resources res) {
+            // Calculate the docked task bounds
+            boolean isHorizontalDivision =
+                    res.getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT;
+            int position = DockedDividerUtils.calculateMiddlePosition(isHorizontalDivision,
+                    insets, width, height, dividerSize);
+            Rect newWindowBounds = new Rect();
+            DockedDividerUtils.calculateBoundsForPosition(position, dockSide, newWindowBounds,
+                    width, height, dividerSize);
+            return newWindowBounds;
+        }
+
+        /**
+         * Returns the task stack bounds with the given {@param width} and
+         * {@param height}.
+         */
+        public Rect getDockedTaskStackBounds(int width, int height, int dividerSize, Rect insets,
+                Resources res) {
+            RecentsConfiguration config = Recents.getConfiguration();
+
+            // Calculate the inverse docked task bounds
+            boolean isHorizontalDivision =
+                    res.getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT;
+            int position = DockedDividerUtils.calculateMiddlePosition(isHorizontalDivision,
+                    insets, width, height, dividerSize);
+            Rect newWindowBounds = new Rect();
+            DockedDividerUtils.calculateBoundsForPosition(position,
+                    DockedDividerUtils.invertDockSide(dockSide), newWindowBounds, width, height,
+                    dividerSize);
+
+            // Calculate the task stack bounds from the new window bounds
+            Rect searchBarSpaceBounds = new Rect();
+            Rect taskStackBounds = new Rect();
+            config.getTaskStackBounds(newWindowBounds, insets.top, insets.right,
+                    searchBarSpaceBounds, taskStackBounds);
+            return taskStackBounds;
+        }
     }
 
     // A comparator that sorts tasks by their last active time
@@ -446,6 +540,7 @@
                 mCb.onHistoryTaskRemoved(this, t);
             }
         }
+        mRawTaskList.remove(t);
     }
 
     /**
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/DropTarget.java b/packages/SystemUI/src/com/android/systemui/recents/views/DropTarget.java
index 8ae00a7..3ad368c 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/DropTarget.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/DropTarget.java
@@ -25,5 +25,5 @@
      * Returns whether this target can accept this drop.  The x,y are relative to the top level
      * RecentsView, and the width/height are of the RecentsView.
      */
-    boolean acceptsDrop(int x, int y, int width, int height);
+    boolean acceptsDrop(int x, int y, int width, int height, boolean isCurrentTarget);
 }
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/RecentsView.java b/packages/SystemUI/src/com/android/systemui/recents/views/RecentsView.java
index e28e2b3..d71bdbe 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/RecentsView.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/RecentsView.java
@@ -19,6 +19,7 @@
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.content.Context;
+import android.content.res.Resources;
 import android.graphics.Canvas;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
@@ -63,6 +64,7 @@
 import com.android.systemui.recents.model.TaskStack;
 import com.android.systemui.stackdivider.WindowManagerProxy;
 import com.android.systemui.statusbar.FlingAnimationUtils;
+import com.android.systemui.statusbar.phone.PhoneStatusBar;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -76,8 +78,7 @@
  */
 public class RecentsView extends FrameLayout {
 
-    private static final String TAG = "RecentsView";
-    private static final boolean DEBUG = false;
+    private static final int DOCK_AREA_OVERLAY_TRANSITION_DURATION = 135;
 
     private final Handler mHandler;
 
@@ -89,6 +90,7 @@
     private boolean mAwaitingFirstLayout = true;
     private boolean mLastTaskLaunchedWasFreeform;
     private Rect mSystemInsets = new Rect();
+    private int mDividerSize;
 
     private RecentsTransitionHelper mTransitionHelper;
     private RecentsViewTouchHandler mTouchHandler;
@@ -118,12 +120,15 @@
     public RecentsView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
         super(context, attrs, defStyleAttr, defStyleRes);
         setWillNotDraw(false);
+
+        SystemServicesProxy ssp = Recents.getSystemServices();
         mHandler = new Handler();
         mTransitionHelper = new RecentsTransitionHelper(getContext(), mHandler);
         mFastOutSlowInInterpolator = AnimationUtils.loadInterpolator(context,
                 com.android.internal.R.interpolator.fast_out_slow_in);
         mFastOutLinearInInterpolator = AnimationUtils.loadInterpolator(context,
                 com.android.internal.R.interpolator.fast_out_linear_in);
+        mDividerSize = ssp.getDockedDividerSize(context);
         mTouchHandler = new RecentsViewTouchHandler(this);
         mFlingAnimationUtils = new FlingAnimationUtils(context, 0.3f);
 
@@ -470,52 +475,77 @@
 
     public final void onBusEvent(DragStartEvent event) {
         updateVisibleDockRegions(mTouchHandler.getDockStatesForCurrentOrientation(),
-                TaskStack.DockState.NONE.viewState.dockAreaAlpha);
+                true /* isDefaultDockState */, TaskStack.DockState.NONE.viewState.dockAreaAlpha,
+                true /* animateAlpha */, false /* animateBounds */);
     }
 
     public final void onBusEvent(DragDropTargetChangedEvent event) {
         if (event.dropTarget == null || !(event.dropTarget instanceof TaskStack.DockState)) {
             updateVisibleDockRegions(mTouchHandler.getDockStatesForCurrentOrientation(),
-                    TaskStack.DockState.NONE.viewState.dockAreaAlpha);
+                    true /* isDefaultDockState */, TaskStack.DockState.NONE.viewState.dockAreaAlpha,
+                    true /* animateAlpha */, true /* animateBounds */);
         } else {
             final TaskStack.DockState dockState = (TaskStack.DockState) event.dropTarget;
-            updateVisibleDockRegions(new TaskStack.DockState[] {dockState}, -1);
+            updateVisibleDockRegions(new TaskStack.DockState[] {dockState},
+                    false /* isDefaultDockState */, -1, true /* animateAlpha */,
+                    true /* animateBounds */);
         }
     }
 
     public final void onBusEvent(final DragEndEvent event) {
-        // Animate the overlay alpha back to 0
-        updateVisibleDockRegions(null, -1);
-
         // Handle the case where we drop onto a dock region
         if (event.dropTarget instanceof TaskStack.DockState) {
-            TaskStack.DockState dockState = (TaskStack.DockState) event.dropTarget;
+            final TaskStack.DockState dockState = (TaskStack.DockState) event.dropTarget;
+
+            // Hide the dock region
+            updateVisibleDockRegions(null, false /* isDefaultDockState */, -1,
+                    false /* animateAlpha */, false /* animateBounds */);
+
             TaskStackLayoutAlgorithm stackLayout = mTaskStackView.getStackAlgorithm();
             TaskStackViewScroller stackScroller = mTaskStackView.getScroller();
             TaskViewTransform tmpTransform = new TaskViewTransform();
 
+            // We translated the view but we need to animate it back from the current layout-space
+            // rect to its final layout-space rect
+            int x = (int) event.taskView.getTranslationX();
+            int y = (int) event.taskView.getTranslationY();
+            Rect taskViewRect = new Rect(event.taskView.getLeft(), event.taskView.getTop(),
+                    event.taskView.getRight(), event.taskView.getBottom());
+            taskViewRect.offset(x, y);
+            event.taskView.setTranslationX(0);
+            event.taskView.setTranslationY(0);
+            event.taskView.setLeftTopRightBottom(taskViewRect.left, taskViewRect.top,
+                    taskViewRect.right, taskViewRect.bottom);
+
             // Remove the task view after it is docked
+            mTaskStackView.updateLayout(false /* boundScroll */);
             stackLayout.getStackTransform(event.task, stackScroller.getStackScroll(), tmpTransform,
                     null);
-            tmpTransform.scale = event.taskView.getScaleX();
-            tmpTransform.rect.offset(event.taskView.getTranslationX(),
-                    event.taskView.getTranslationY());
+            tmpTransform.alpha = 0;
+            tmpTransform.scale = 1f;
+            tmpTransform.rect.set(taskViewRect);
             mTaskStackView.updateTaskViewToTransform(event.taskView, tmpTransform,
-                    new TaskViewAnimation(150, mFastOutLinearInInterpolator,
+                    new TaskViewAnimation(125, PhoneStatusBar.ALPHA_OUT,
                             new AnimatorListenerAdapter() {
                                 @Override
                                 public void onAnimationEnd(Animator animation) {
+                                    // Dock the task and launch it
+                                    SystemServicesProxy ssp = Recents.getSystemServices();
+                                    ssp.startTaskInDockedMode(getContext(), event.task.key.id,
+                                            dockState.createMode);
+                                    launchTask(event.task, null, INVALID_STACK_ID);
+
                                     mTaskStackView.getStack().removeTask(event.task);
                                 }
                             }));
 
-            // Dock the task and launch it
-            SystemServicesProxy ssp = Recents.getSystemServices();
-            ssp.startTaskInDockedMode(event.task.key.id, dockState.createMode);
-            launchTask(event.task, null, INVALID_STACK_ID);
 
             MetricsLogger.action(mContext,
                     MetricsLogger.ACTION_WINDOW_DOCK_DRAG_DROP);
+        } else {
+            // Animate the overlay alpha back to 0
+            updateVisibleDockRegions(null, true /* isDefaultDockState */, -1,
+                    true /* animateAlpha */, false /* animateBounds */);
         }
     }
 
@@ -638,7 +668,9 @@
     /**
      * Updates the dock region to match the specified dock state.
      */
-    private void updateVisibleDockRegions(TaskStack.DockState[] newDockStates, int overrideAlpha) {
+    private void updateVisibleDockRegions(TaskStack.DockState[] newDockStates,
+            boolean isDefaultDockState, int overrideAlpha, boolean animateAlpha,
+            boolean animateBounds) {
         ArraySet<TaskStack.DockState> newDockStatesSet = new ArraySet<>();
         if (newDockStates != null) {
             Collections.addAll(newDockStatesSet, newDockStates);
@@ -647,14 +679,21 @@
             TaskStack.DockState.ViewState viewState = dockState.viewState;
             if (newDockStates == null || !newDockStatesSet.contains(dockState)) {
                 // This is no longer visible, so hide it
-                viewState.startAlphaAnimation(0, 150);
+                viewState.startAnimation(null, 0, DOCK_AREA_OVERLAY_TRANSITION_DURATION,
+                        PhoneStatusBar.ALPHA_OUT, animateAlpha, animateBounds);
             } else {
                 // This state is now visible, update the bounds and show it
                 int alpha = (overrideAlpha != -1 ? overrideAlpha : viewState.dockAreaAlpha);
-                viewState.dockAreaOverlay.setBounds(
-                        dockState.getDockedBounds(getMeasuredWidth(), getMeasuredHeight()));
-                viewState.dockAreaOverlay.setCallback(this);
-                viewState.startAlphaAnimation(alpha, 150);
+                Rect bounds = isDefaultDockState
+                        ? dockState.getPreDockedBounds(getMeasuredWidth(), getMeasuredHeight())
+                        : dockState.getDockedBounds(getMeasuredWidth(), getMeasuredHeight(),
+                        mDividerSize, mSystemInsets, getResources());
+                if (viewState.dockAreaOverlay.getCallback() != this) {
+                    viewState.dockAreaOverlay.setCallback(this);
+                    viewState.dockAreaOverlay.setBounds(bounds);
+                }
+                viewState.startAnimation(bounds, alpha, DOCK_AREA_OVERLAY_TRANSITION_DURATION,
+                        PhoneStatusBar.ALPHA_IN, animateAlpha, animateBounds);
             }
         }
     }
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/RecentsViewTouchHandler.java b/packages/SystemUI/src/com/android/systemui/recents/views/RecentsViewTouchHandler.java
index 473334b..0ca46a0 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/RecentsViewTouchHandler.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/RecentsViewTouchHandler.java
@@ -19,6 +19,7 @@
 import android.content.res.Configuration;
 import android.graphics.Point;
 import android.view.MotionEvent;
+import android.view.ViewConfiguration;
 import com.android.systemui.recents.Recents;
 import com.android.systemui.recents.RecentsConfiguration;
 import com.android.systemui.recents.events.EventBus;
@@ -64,13 +65,16 @@
 
     private Point mTaskViewOffset = new Point();
     private Point mDownPos = new Point();
-    private boolean mDragging;
+    private boolean mDragRequested;
+    private boolean mIsDragging;
+    private float mDragSlop;
 
     private DropTarget mLastDropTarget;
     private ArrayList<DropTarget> mDropTargets = new ArrayList<>();
 
     public RecentsViewTouchHandler(RecentsView rv) {
         mRv = rv;
+        mDragSlop = ViewConfiguration.get(rv.getContext()).getScaledTouchSlop();
     }
 
     /**
@@ -96,13 +100,13 @@
     /** Touch preprocessing for handling below */
     public boolean onInterceptTouchEvent(MotionEvent ev) {
         handleTouchEvent(ev);
-        return mDragging;
+        return mDragRequested;
     }
 
     /** Handles touch events once we have intercepted them */
     public boolean onTouchEvent(MotionEvent ev) {
         handleTouchEvent(ev);
-        return mDragging;
+        return mDragRequested;
     }
 
     /**** Events ****/
@@ -110,7 +114,9 @@
     public final void onBusEvent(DragStartEvent event) {
         SystemServicesProxy ssp = Recents.getSystemServices();
         mRv.getParent().requestDisallowInterceptTouchEvent(true);
-        mDragging = true;
+        mDragRequested = true;
+        // We defer starting the actual drag handling until the user moves past the drag slop
+        mIsDragging = false;
         mDragTask = event.task;
         mTaskView = event.taskView;
         mDropTargets.clear();
@@ -137,7 +143,7 @@
     }
 
     public final void onBusEvent(DragEndEvent event) {
-        mDragging = false;
+        mDragRequested = false;
         mDragTask = null;
         mTaskView = null;
         mLastDropTarget = null;
@@ -153,25 +159,45 @@
                 mDownPos.set((int) ev.getX(), (int) ev.getY());
                 break;
             case MotionEvent.ACTION_MOVE: {
-                if (mDragging) {
-                    int width = mRv.getMeasuredWidth();
-                    int height = mRv.getMeasuredHeight();
-                    float evX = ev.getX();
-                    float evY = ev.getY();
-                    float x = evX - mTaskViewOffset.x;
-                    float y = evY - mTaskViewOffset.y;
+                float evX = ev.getX();
+                float evY = ev.getY();
+                float x = evX - mTaskViewOffset.x;
+                float y = evY - mTaskViewOffset.y;
 
-                    DropTarget currentDropTarget = null;
-                    for (DropTarget target : mDropTargets) {
-                        if (target.acceptsDrop((int) evX, (int) evY, width, height)) {
-                            currentDropTarget = target;
-                            break;
-                        }
+                if (mDragRequested) {
+                    if (!mIsDragging) {
+                        mIsDragging = Math.hypot(evX - mDownPos.x, evY - mDownPos.y) > mDragSlop;
                     }
-                    if (mLastDropTarget != currentDropTarget) {
-                        mLastDropTarget = currentDropTarget;
-                        EventBus.getDefault().send(new DragDropTargetChangedEvent(mDragTask,
-                                currentDropTarget));
+                    if (mIsDragging) {
+                        int width = mRv.getMeasuredWidth();
+                        int height = mRv.getMeasuredHeight();
+
+                        DropTarget currentDropTarget = null;
+
+                        // Give priority to the current drop target to retain the touch handling
+                        if (mLastDropTarget != null) {
+                            if (mLastDropTarget.acceptsDrop((int) evX, (int) evY, width, height,
+                                    true /* isCurrentTarget */)) {
+                                currentDropTarget = mLastDropTarget;
+                            }
+                        }
+
+                        // Otherwise, find the next target to handle this event
+                        if (currentDropTarget == null) {
+                            for (DropTarget target : mDropTargets) {
+                                if (target.acceptsDrop((int) evX, (int) evY, width, height,
+                                        false /* isCurrentTarget */)) {
+                                    currentDropTarget = target;
+                                    break;
+                                }
+                            }
+                        }
+                        if (mLastDropTarget != currentDropTarget) {
+                            mLastDropTarget = currentDropTarget;
+                            EventBus.getDefault().send(new DragDropTargetChangedEvent(mDragTask,
+                                    currentDropTarget));
+                        }
+
                     }
 
                     mTaskView.setTranslationX(x);
@@ -181,7 +207,7 @@
             }
             case MotionEvent.ACTION_UP:
             case MotionEvent.ACTION_CANCEL: {
-                if (mDragging) {
+                if (mDragRequested) {
                     EventBus.getDefault().send(new DragEndEvent(mDragTask, mTaskView,
                             mLastDropTarget));
                     break;
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackLayoutAlgorithm.java b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackLayoutAlgorithm.java
index c2bb745..e908e53 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackLayoutAlgorithm.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackLayoutAlgorithm.java
@@ -37,7 +37,9 @@
 import com.android.systemui.recents.model.TaskStack;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
+import java.util.HashSet;
 
 /**
  * Used to describe a visible range that can be normalized to [0, 1].
@@ -373,7 +375,7 @@
      * Computes the minimum and maximum scroll progress values and the progress values for each task
      * in the stack.
      */
-    void update(TaskStack stack) {
+    void update(TaskStack stack, HashSet<Task> ignoreTasksSet) {
         SystemServicesProxy ssp = Recents.getSystemServices();
 
         // Clear the progress map
@@ -393,6 +395,9 @@
         ArrayList<Task> stackTasks = new ArrayList<>();
         for (int i = 0; i < tasks.size(); i++) {
             Task task = tasks.get(i);
+            if (ignoreTasksSet.contains(task)) {
+                continue;
+            }
             if (task.isFreeformTask()) {
                 freeformTasks.add(task);
             } else {
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackView.java b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackView.java
index ceab9c7..582698c 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackView.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackView.java
@@ -28,8 +28,6 @@
 import android.os.Bundle;
 import android.os.Parcelable;
 import android.provider.Settings;
-import android.util.IntProperty;
-import android.util.Property;
 import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.view.View;
@@ -77,6 +75,7 @@
 import com.android.systemui.recents.model.TaskStack;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
@@ -105,19 +104,6 @@
     private static final int DRAG_SCALE_DURATION = 175;
     private static final float DRAG_SCALE_FACTOR = 1.05f;
 
-    public static final Property<Drawable, Integer> DRAWABLE_ALPHA =
-            new IntProperty<Drawable>("drawableAlpha") {
-                @Override
-                public void setValue(Drawable object, int alpha) {
-                    object.setAlpha(alpha);
-                }
-
-                @Override
-                public Integer get(Drawable object) {
-                    return object.getAlpha();
-                }
-            };
-
     TaskStack mStack;
     TaskStackLayoutAlgorithm mLayoutAlgorithm;
     TaskStackViewScroller mStackScroller;
@@ -136,6 +122,7 @@
     Task mFocusedTask;
 
     int mTaskCornerRadiusPx;
+    private int mDividerSize;
 
     boolean mTaskViewsClipDirty = true;
     boolean mAwaitingFirstLayout = true;
@@ -143,10 +130,14 @@
     boolean mTouchExplorationEnabled;
     boolean mScreenPinningEnabled;
 
-    Rect mTaskStackBounds = new Rect();
+    // The stable stack bounds are the full bounds that we were measured with from RecentsView
+    Rect mStableStackBounds = new Rect();
+    // The current stack bounds are dynamic and may change as the user drags and drops
+    Rect mStackBounds = new Rect();
     int[] mTmpVisibleRange = new int[2];
     Rect mTmpRect = new Rect();
     HashMap<Task, TaskView> mTmpTaskViewMap = new HashMap<>();
+    HashSet<Task> mTmpTaskSet = new HashSet<>();
     List<TaskView> mTmpTaskViews = new ArrayList<>();
     TaskViewTransform mTmpTransform = new TaskViewTransform();
     LayoutInflater mInflater;
@@ -166,15 +157,25 @@
     // The drop targets for a task drag
     private DropTarget mFreeformWorkspaceDropTarget = new DropTarget() {
         @Override
-        public boolean acceptsDrop(int x, int y, int width, int height) {
-            return mLayoutAlgorithm.mFreeformRect.contains(x, y);
+        public boolean acceptsDrop(int x, int y, int width, int height, boolean isCurrentTarget) {
+            // This drop target has a fixed bounds and should be checked last, so just fall through
+            // if it is the current target
+            if (!isCurrentTarget) {
+                return mLayoutAlgorithm.mFreeformRect.contains(x, y);
+            }
+            return false;
         }
     };
 
     private DropTarget mStackDropTarget = new DropTarget() {
         @Override
-        public boolean acceptsDrop(int x, int y, int width, int height) {
-            return mLayoutAlgorithm.mStackRect.contains(x, y);
+        public boolean acceptsDrop(int x, int y, int width, int height, boolean isCurrentTarget) {
+            // This drop target has a fixed bounds and should be checked last, so just fall through
+            // if it is the current target
+            if (!isCurrentTarget) {
+                return mLayoutAlgorithm.mStackRect.contains(x, y);
+            }
+            return false;
         }
     };
 
@@ -196,6 +197,7 @@
                 com.android.internal.R.interpolator.fast_out_slow_in);
         mTaskCornerRadiusPx = res.getDimensionPixelSize(
                 R.dimen.recents_task_view_rounded_corners_radius);
+        mDividerSize = ssp.getDockedDividerSize(context);
 
         int taskBarDismissDozeDelaySeconds = getResources().getInteger(
                 R.integer.recents_task_bar_dismiss_delay_seconds);
@@ -347,9 +349,8 @@
      * This call ignores freeform tasks.
      */
     private boolean updateStackTransforms(ArrayList<TaskViewTransform> taskTransforms,
-                                       ArrayList<Task> tasks,
-                                       float stackScroll,
-                                       int[] visibleRangeOut) {
+            ArrayList<Task> tasks, float stackScroll,
+            int[] visibleRangeOut, HashSet<Task> ignoreTasksSet) {
         int taskTransformCount = taskTransforms.size();
         int taskCount = tasks.size();
         int frontMostVisibleIndex = -1;
@@ -370,6 +371,10 @@
         TaskViewTransform frontTransform = null;
         for (int i = taskCount - 1; i >= 0; i--) {
             Task task = tasks.get(i);
+            if (ignoreTasksSet.contains(task)) {
+                continue;
+            }
+
             TaskViewTransform transform = mLayoutAlgorithm.getStackTransform(task, stackScroll,
                     taskTransforms.get(i), frontTransform);
 
@@ -410,14 +415,14 @@
      * they are initially picked up from the pool, when they will be placed in a suitable initial
      * position.
      */
-    private void bindTaskViewsWithStack() {
+    private void bindTaskViewsWithStack(HashSet<Task> ignoreTasksSet) {
         final float stackScroll = mStackScroller.getStackScroll();
         final int[] visibleStackRange = mTmpVisibleRange;
 
         // Get all the task transforms
         final ArrayList<Task> tasks = mStack.getStackTasks();
-        final boolean isValidVisibleStackRange = updateStackTransforms(mCurrentTaskTransforms, tasks,
-                stackScroll, visibleStackRange);
+        final boolean isValidVisibleStackRange = updateStackTransforms(mCurrentTaskTransforms,
+                tasks, stackScroll, visibleStackRange, ignoreTasksSet);
 
         // Return all the invisible children to the pool
         mTmpTaskViewMap.clear();
@@ -429,6 +434,11 @@
             final Task task = tv.getTask();
             final int taskIndex = mStack.indexOfStackTask(task);
 
+            // Skip ignored tasks
+            if (ignoreTasksSet.contains(task)) {
+                continue;
+            }
+
             if (task.isFreeformTask() ||
                     visibleStackRange[1] <= taskIndex && taskIndex <= visibleStackRange[0]) {
                 mTmpTaskViewMap.put(task, tv);
@@ -447,6 +457,11 @@
             final Task task = tasks.get(i);
             final TaskViewTransform transform = mCurrentTaskTransforms.get(i);
 
+            // Skip ignored tasks
+            if (ignoreTasksSet.contains(task)) {
+                continue;
+            }
+
             // Skip the invisible non-freeform stack tasks
             if (i > visibleStackRange[0] && !task.isFreeformTask()) {
                 continue;
@@ -496,8 +511,15 @@
     /**
      * Cancels any existing {@link TaskView} animations, and updates each {@link TaskView} to its
      * current position as defined by the {@link TaskStackLayoutAlgorithm}.
+     *
+     * @param ignoreTasks the set of tasks to ignore in the relayout
      */
-    private void updateTaskViewsToLayout(TaskViewAnimation animation) {
+    private void updateTaskViewsToLayout(TaskViewAnimation animation, Task... ignoreTasks) {
+        // Keep track of the ignore tasks
+        HashSet<Task> ignoreTasksSet = mTmpTaskSet;
+        ignoreTasksSet.clear();
+        Collections.addAll(ignoreTasksSet, ignoreTasks);
+
         // If we had a deferred animation, cancel that
         mDeferredTaskViewUpdateAnimation = null;
 
@@ -505,7 +527,7 @@
         cancelAllTaskViewAnimations();
 
         // Fetch the current set of TaskViews
-        bindTaskViewsWithStack();
+        bindTaskViewsWithStack(ignoreTasksSet);
 
         // Animate them to their final transforms with the given animation
         List<TaskView> taskViews = getTaskViews();
@@ -515,6 +537,10 @@
             final int taskIndex = mStack.indexOfStackTask(tv.getTask());
             final TaskViewTransform transform = mCurrentTaskTransforms.get(taskIndex);
 
+            if (ignoreTasksSet.contains(tv.getTask())) {
+                continue;
+            }
+
             updateTaskViewToTransform(tv, transform, animation);
         }
     }
@@ -542,8 +568,7 @@
      */
     private void cancelAllTaskViewAnimations() {
         List<TaskView> taskViews = getTaskViews();
-        int taskViewCount = taskViews.size();
-        for (int i = 0; i < taskViewCount; i++) {
+        for (int i = taskViews.size() - 1; i >= 0; i--) {
             final TaskView tv = taskViews.get(i);
             tv.cancelTransformAnimation();
         }
@@ -594,10 +619,19 @@
         mTaskViewsClipDirty = false;
     }
 
-    /** Updates the min and max virtual scroll bounds */
-    void updateLayout(boolean boundScrollToNewMinMax) {
+    /**
+     * Updates the min and max virtual scroll bounds.
+     *
+     * @param ignoreTasks the set of tasks to ignore in the relayout
+     */
+    void updateLayout(boolean boundScrollToNewMinMax, Task... ignoreTasks) {
+        // Keep track of the ingore tasks
+        HashSet<Task> ignoreTasksSet = mTmpTaskSet;
+        ignoreTasksSet.clear();
+        Collections.addAll(ignoreTasksSet, ignoreTasks);
+
         // Compute the min and max scroll values
-        mLayoutAlgorithm.update(mStack);
+        mLayoutAlgorithm.update(mStack, ignoreTasksSet);
 
         // Update the freeform workspace
         SystemServicesProxy ssp = Recents.getSystemServices();
@@ -918,14 +952,18 @@
         }
     }
 
-    /** Computes the stack and task rects */
-    public void computeRects(Rect taskStackBounds) {
+    /**
+     * Computes the stack and task rects.
+     *
+     * @param ignoreTasks the set of tasks to ignore in the relayout
+     */
+    public void computeRects(Rect taskStackBounds, boolean boundScroll, Task... ignoreTasks) {
         // Compute the rects in the stack algorithm
         mLayoutAlgorithm.initialize(taskStackBounds,
                 TaskStackLayoutAlgorithm.StackState.getStackStateForStack(mStack));
 
         // Update the scroll bounds
-        updateLayout(false);
+        updateLayout(boundScroll, ignoreTasks);
     }
 
     /**
@@ -945,9 +983,19 @@
         return mLayoutAlgorithm.computeStackVisibilityReport(mStack.getStackTasks());
     }
 
+    /**
+     * Updates the expected task stack bounds for this stack view.
+     */
     public void setTaskStackBounds(Rect taskStackBounds, Rect systemInsets) {
-        mTaskStackBounds.set(taskStackBounds);
+        // We can get spurious measure passes with the old bounds when docking, and since we are
+        // using the current stack bounds during drag and drop, don't overwrite them until we
+        // actually get new bounds
+        if (!taskStackBounds.equals(mStableStackBounds)) {
+            mStableStackBounds.set(taskStackBounds);
+            mStackBounds.set(taskStackBounds);
+        }
         mLayoutAlgorithm.setSystemInsets(systemInsets);
+        requestLayout();
     }
 
     /**
@@ -960,14 +1008,15 @@
         int height = MeasureSpec.getSize(heightMeasureSpec);
 
         // Compute our stack/task rects
-        computeRects(mTaskStackBounds);
+        computeRects(mStackBounds, false);
 
         // If this is the first layout, then scroll to the front of the stack, then update the
         // TaskViews with the stack so that we can lay them out
         if (mAwaitingFirstLayout) {
             mStackScroller.setStackScrollToInitialState();
         }
-        bindTaskViewsWithStack();
+        mTmpTaskSet.clear();
+        bindTaskViewsWithStack(mTmpTaskSet);
 
         // Measure each of the TaskViews
         mTmpTaskViews.clear();
@@ -1407,6 +1456,7 @@
         mLayoutAlgorithm.getStackTransform(event.task, getScroller().getStackScroll(),
                 mTmpTransform, null);
         mTmpTransform.scale = finalScale;
+        mTmpTransform.translationZ = mLayoutAlgorithm.mMaxTranslationZ + 1;
         updateTaskViewToTransform(event.taskView, mTmpTransform,
                 new TaskViewAnimation(DRAG_SCALE_DURATION, mFastOutSlowInInterpolator));
     }
@@ -1420,7 +1470,23 @@
     }
 
     public final void onBusEvent(DragDropTargetChangedEvent event) {
-        // TODO: Animate the freeform workspace background etc.
+        if (event.dropTarget instanceof TaskStack.DockState) {
+            // Calculate the new task stack bounds that matches the window size that Recents will
+            // have after the drop
+            final TaskStack.DockState dockState = (TaskStack.DockState) event.dropTarget;
+            mStackBounds.set(dockState.getDockedTaskStackBounds(getMeasuredWidth(),
+                    getMeasuredHeight(), mDividerSize, mLayoutAlgorithm.mSystemInsets,
+                    getResources()));
+            computeRects(mStackBounds, true /* boundScroll */, event.task /* ignoreTask */);
+            updateTaskViewsToLayout(new TaskViewAnimation(250, mFastOutSlowInInterpolator),
+                    event.task /* ignoreTask */);
+        } else {
+            // Restore the pre-drag task stack bounds
+            mStackBounds.set(mStableStackBounds);
+            computeRects(mStackBounds, true /* boundScroll */);
+            updateTaskViewsToLayout(new TaskViewAnimation(250, mFastOutSlowInInterpolator),
+                    event.task /* ignoreTask */);
+        }
     }
 
     public final void onBusEvent(final DragEndEvent event) {
@@ -1564,7 +1630,7 @@
 
         Utilities.cancelAnimationWithoutCallbacks(mFreeformWorkspaceBackgroundAnimator);
         mFreeformWorkspaceBackgroundAnimator = ObjectAnimator.ofInt(mFreeformWorkspaceBackground,
-                DRAWABLE_ALPHA, mFreeformWorkspaceBackground.getAlpha(), targetAlpha);
+                Utilities.DRAWABLE_ALPHA, mFreeformWorkspaceBackground.getAlpha(), targetAlpha);
         mFreeformWorkspaceBackgroundAnimator.setDuration(duration);
         mFreeformWorkspaceBackgroundAnimator.setInterpolator(interpolator);
         mFreeformWorkspaceBackgroundAnimator.start();
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewHeader.java b/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewHeader.java
index 00d64fe..96dadff 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewHeader.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewHeader.java
@@ -136,6 +136,10 @@
     float mDimAlpha;
     Drawable mLightDismissDrawable;
     Drawable mDarkDismissDrawable;
+    Drawable mLightFreeformIcon;
+    Drawable mDarkFreeformIcon;
+    Drawable mLightFullscreenIcon;
+    Drawable mDarkFullscreenIcon;
     int mTaskBarViewLightTextColor;
     int mTaskBarViewDarkTextColor;
     String mDismissContentDescription;
@@ -179,6 +183,11 @@
         mHighlightHeight = res.getDimensionPixelSize(R.dimen.recents_task_view_highlight);
         mTaskBarViewLightTextColor = context.getColor(R.color.recents_task_bar_light_text_color);
         mTaskBarViewDarkTextColor = context.getColor(R.color.recents_task_bar_dark_text_color);
+        mLightFreeformIcon = context.getDrawable(R.drawable.recents_move_task_freeform_light);
+        mDarkFreeformIcon = context.getDrawable(R.drawable.recents_move_task_freeform_dark);
+        mLightFullscreenIcon = context.getDrawable(R.drawable.recents_move_task_fullscreen_light);
+        mDarkFullscreenIcon = context.getDrawable(R.drawable.recents_move_task_fullscreen_dark);
+
         mFastOutSlowInInterpolator = AnimationUtils.loadInterpolator(context,
                 com.android.internal.R.interpolator.fast_out_slow_in);
         mFastOutLinearInInterpolator = AnimationUtils.loadInterpolator(context,
@@ -223,7 +232,9 @@
         mTaskViewRect.set(0, 0, width, height);
         boolean updateMoveTaskButton = mMoveTaskButton.getVisibility() != View.GONE;
         int appIconWidth = mIconView.getMeasuredWidth();
-        int activityDescWidth = mTitleView.getMeasuredWidth();
+        int activityDescWidth = (mTask != null)
+                ? (int) mTitleView.getPaint().measureText(mTask.title)
+                : mTitleView.getMeasuredWidth();
         int dismissIconWidth = mDismissButton.getMeasuredWidth();
         int moveTaskIconWidth = mMoveTaskButton.getVisibility() == View.VISIBLE
                 ? mMoveTaskButton.getMeasuredWidth()
@@ -360,14 +371,14 @@
         if (ssp.hasFreeformWorkspaceSupport()) {
             if (t.isFreeformTask()) {
                 mMoveTaskTargetStackId = FULLSCREEN_WORKSPACE_STACK_ID;
-                mMoveTaskButton.setImageResource(t.useLightOnPrimaryColor
-                        ? R.drawable.recents_move_task_fullscreen_light
-                        : R.drawable.recents_move_task_fullscreen_dark);
+                mMoveTaskButton.setImageDrawable(t.useLightOnPrimaryColor
+                        ? mLightFullscreenIcon
+                        : mDarkFullscreenIcon);
             } else {
                 mMoveTaskTargetStackId = FREEFORM_WORKSPACE_STACK_ID;
-                mMoveTaskButton.setImageResource(t.useLightOnPrimaryColor
-                        ? R.drawable.recents_move_task_freeform_light
-                        : R.drawable.recents_move_task_freeform_dark);
+                mMoveTaskButton.setImageDrawable(t.useLightOnPrimaryColor
+                        ? mLightFreeformIcon
+                        : mDarkFreeformIcon);
             }
             if (mMoveTaskButton.getVisibility() != View.VISIBLE) {
                 mMoveTaskButton.setVisibility(View.VISIBLE);
diff --git a/packages/SystemUI/src/com/android/systemui/stackdivider/DividerView.java b/packages/SystemUI/src/com/android/systemui/stackdivider/DividerView.java
index 824d10a..c16703e8 100644
--- a/packages/SystemUI/src/com/android/systemui/stackdivider/DividerView.java
+++ b/packages/SystemUI/src/com/android/systemui/stackdivider/DividerView.java
@@ -363,21 +363,6 @@
         return mStartPosition + touchY - mStartY;
     }
 
-    private int invertDockSide(int dockSide) {
-        switch (dockSide) {
-            case WindowManager.DOCKED_LEFT:
-                return WindowManager.DOCKED_RIGHT;
-            case WindowManager.DOCKED_TOP:
-                return WindowManager.DOCKED_BOTTOM;
-            case WindowManager.DOCKED_RIGHT:
-                return WindowManager.DOCKED_LEFT;
-            case WindowManager.DOCKED_BOTTOM:
-                return WindowManager.DOCKED_TOP;
-            default:
-                return WindowManager.DOCKED_INVALID;
-        }
-    }
-
     private void alignTopLeft(Rect containingRect, Rect rect) {
         int width = rect.width();
         int height = rect.height();
@@ -409,8 +394,9 @@
 
         mLastResizeRect.set(mDockedRect);
         if (taskPosition != TASK_POSITION_SAME) {
-            calculateBoundsForPosition(position, invertDockSide(mDockSide), mOtherRect);
-            int dockSideInverted = invertDockSide(mDockSide);
+            calculateBoundsForPosition(position, DockedDividerUtils.invertDockSide(mDockSide),
+                    mOtherRect);
+            int dockSideInverted = DockedDividerUtils.invertDockSide(mDockSide);
             int taskPositionDocked =
                     restrictDismissingTaskPosition(taskPosition, mDockSide, taskSnapTarget);
             int taskPositionOther =