diff --git a/core/java/com/android/internal/policy/DividerSnapAlgorithm.java b/core/java/com/android/internal/policy/DividerSnapAlgorithm.java
index 84d0fc7..9907ea9 100644
--- a/core/java/com/android/internal/policy/DividerSnapAlgorithm.java
+++ b/core/java/com/android/internal/policy/DividerSnapAlgorithm.java
@@ -279,6 +279,26 @@
     }
 
     /**
+     * Cycles through all non-dismiss targets with a stepping of {@param increment}. It moves left
+     * if {@param increment} is negative and moves right otherwise.
+     */
+    public SnapTarget cycleNonDismissTarget(SnapTarget snapTarget, int increment) {
+        int index = mTargets.indexOf(snapTarget);
+        if (index != -1) {
+            SnapTarget newTarget = mTargets.get((index + mTargets.size() + increment)
+                    % mTargets.size());
+            if (newTarget == mDismissStartTarget) {
+                return mLastSplitTarget;
+            } else if (newTarget == mDismissEndTarget) {
+                return mFirstSplitTarget;
+            } else {
+                return newTarget;
+            }
+        }
+        return snapTarget;
+    }
+
+    /**
      * Represents a snap target for the divider.
      */
     public static class SnapTarget {
diff --git a/packages/SystemUI/src/com/android/systemui/recents/Recents.java b/packages/SystemUI/src/com/android/systemui/recents/Recents.java
index da77dfd..73ce26f 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/Recents.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/Recents.java
@@ -23,7 +23,9 @@
 import android.content.Intent;
 import android.content.ServiceConnection;
 import android.content.res.Configuration;
+import android.graphics.Point;
 import android.graphics.Rect;
+import android.hardware.display.DisplayManager;
 import android.os.Build;
 import android.os.Handler;
 import android.os.IBinder;
@@ -389,6 +391,13 @@
             return false;
         }
 
+        Point realSize = new Point();
+        if (initialBounds == null) {
+            mContext.getSystemService(DisplayManager.class).getDisplay(Display.DEFAULT_DISPLAY)
+                    .getRealSize(realSize);
+            initialBounds = new Rect(0, 0, realSize.x, realSize.y);
+        }
+
         int currentUser = sSystemServicesProxy.getCurrentUser();
         SystemServicesProxy ssp = Recents.getSystemServices();
         ActivityManager.RunningTaskInfo topTask = ssp.getTopMostTask();
diff --git a/packages/SystemUI/src/com/android/systemui/shortcut/ShortcutKeyDispatcher.java b/packages/SystemUI/src/com/android/systemui/shortcut/ShortcutKeyDispatcher.java
index 8f8683b..69dcabe 100644
--- a/packages/SystemUI/src/com/android/systemui/shortcut/ShortcutKeyDispatcher.java
+++ b/packages/SystemUI/src/com/android/systemui/shortcut/ShortcutKeyDispatcher.java
@@ -17,18 +17,31 @@
 package com.android.systemui.shortcut;
 
 import android.accessibilityservice.AccessibilityServiceInfo;
+import android.app.ActivityManager;
+import android.app.ActivityManagerNative;
+import android.app.IActivityManager;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.pm.ServiceInfo;
+import android.content.res.Configuration;
 import android.os.RemoteException;
+import android.util.DisplayMetrics;
 import android.util.Log;
 import android.view.IWindowManager;
 import android.view.KeyEvent;
+import android.view.WindowManager;
 import android.view.WindowManagerGlobal;
 import android.view.accessibility.AccessibilityManager;
+import com.android.internal.logging.MetricsLogger;
+import com.android.internal.logging.MetricsProto.MetricsEvent;
+import com.android.internal.policy.DividerSnapAlgorithm;
 import com.android.settingslib.accessibility.AccessibilityUtils;
 import com.android.systemui.R;
 import com.android.systemui.SystemUI;
+import com.android.systemui.recents.Recents;
+import com.android.systemui.stackdivider.Divider;
+import com.android.systemui.stackdivider.DividerView;
+import com.android.systemui.statusbar.phone.NavigationBarGestureHelper;
 
 import java.util.List;
 import java.util.Set;
@@ -42,28 +55,70 @@
     private static final String TAG = "ShortcutKeyDispatcher";
 
     private ShortcutKeyServiceProxy mShortcutKeyServiceProxy = new ShortcutKeyServiceProxy(this);
-    private IWindowManager windowManagerService = WindowManagerGlobal.getWindowManagerService();
+    private IWindowManager mWindowManagerService = WindowManagerGlobal.getWindowManagerService();
+    private IActivityManager mActivityManager = ActivityManagerNative.getDefault();
 
     protected final long META_MASK = ((long) KeyEvent.META_META_ON) << Integer.SIZE;
     protected final long ALT_MASK = ((long) KeyEvent.META_ALT_ON) << Integer.SIZE;
     protected final long CTRL_MASK = ((long) KeyEvent.META_CTRL_ON) << Integer.SIZE;
     protected final long SHIFT_MASK = ((long) KeyEvent.META_SHIFT_ON) << Integer.SIZE;
 
+    protected final long SC_DOCK_LEFT = META_MASK | KeyEvent.KEYCODE_LEFT_BRACKET;
+    protected final long SC_DOCK_RIGHT = META_MASK | KeyEvent.KEYCODE_RIGHT_BRACKET;
+
     /**
      * Registers a shortcut key to window manager.
      * @param shortcutCode packed representation of shortcut key code and meta information
      */
     public void registerShortcutKey(long shortcutCode) {
         try {
-            windowManagerService.registerShortcutKey(shortcutCode, mShortcutKeyServiceProxy);
+            mWindowManagerService.registerShortcutKey(shortcutCode, mShortcutKeyServiceProxy);
         } catch (RemoteException e) {
             // Do nothing
         }
     }
 
     @Override
-    public void onShortcutKeyPressed(long shortcutCode) {}
+    public void onShortcutKeyPressed(long shortcutCode) {
+        int orientation = mContext.getResources().getConfiguration().orientation;
+        if ((shortcutCode == SC_DOCK_LEFT || shortcutCode == SC_DOCK_RIGHT)
+                && orientation == Configuration.ORIENTATION_LANDSCAPE) {
+            handleDockKey(shortcutCode);
+        }
+    }
 
     @Override
-    public void start() {}
+    public void start() {
+        registerShortcutKey(SC_DOCK_LEFT);
+        registerShortcutKey(SC_DOCK_RIGHT);
+    }
+
+    private void handleDockKey(long shortcutCode) {
+        try {
+            int dockSide = mWindowManagerService.getDockedStackSide();
+            if (dockSide == WindowManager.DOCKED_INVALID) {
+                // If there is no window docked, we dock the top-most window.
+                Recents recents = getComponent(Recents.class);
+                int dockMode = (shortcutCode == SC_DOCK_LEFT)
+                        ? ActivityManager.DOCKED_STACK_CREATE_MODE_TOP_OR_LEFT
+                        : ActivityManager.DOCKED_STACK_CREATE_MODE_BOTTOM_OR_RIGHT;
+                recents.dockTopTask(NavigationBarGestureHelper.DRAG_MODE_NONE, dockMode, null);
+                MetricsLogger.action(mContext, MetricsEvent.WINDOW_DOCK_SHORTCUTS);
+            } else {
+                // If there is already a docked window, we respond by resizing the docking pane.
+                DividerView dividerView = getComponent(Divider.class).getView();
+                DividerSnapAlgorithm snapAlgorithm = dividerView.getSnapAlgorithm();
+                int dividerPosition = dividerView.getCurrentPosition();
+                DividerSnapAlgorithm.SnapTarget currentTarget =
+                        snapAlgorithm.calculateNonDismissingSnapTarget(dividerPosition);
+                int increment = (shortcutCode == SC_DOCK_LEFT) ? -1 : 1;
+                DividerSnapAlgorithm.SnapTarget target = snapAlgorithm.cycleNonDismissTarget(
+                        currentTarget, increment);
+                dividerView.startDragging(true /* animate */, false /* touching */);
+                dividerView.stopDragging(target.position, 0f, true /* avoidDismissStart */);
+            }
+        } catch (RemoteException e) {
+            Log.e(TAG, "handleDockKey() failed.");
+        }
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
index 6ad7aad..4b8b6c1 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
@@ -1172,13 +1172,8 @@
         }
         int dockSide = WindowManagerProxy.getInstance().getDockSide();
         if (dockSide == WindowManager.DOCKED_INVALID) {
-            Point realSize = new Point();
-            mContext.getSystemService(DisplayManager.class).getDisplay(Display.DEFAULT_DISPLAY)
-                    .getRealSize(realSize);
-            Rect initialBounds= new Rect(0, 0, realSize.x, realSize.y);
             return mRecents.dockTopTask(NavigationBarGestureHelper.DRAG_MODE_NONE,
-                    ActivityManager.DOCKED_STACK_CREATE_MODE_TOP_OR_LEFT,
-                    initialBounds);
+                    ActivityManager.DOCKED_STACK_CREATE_MODE_TOP_OR_LEFT, null);
         } else {
             EventBus.getDefault().send(new UndockingTaskEvent());
             return false;
diff --git a/proto/src/metrics_constants.proto b/proto/src/metrics_constants.proto
index fb50df9..d36a1d7 100644
--- a/proto/src/metrics_constants.proto
+++ b/proto/src/metrics_constants.proto
@@ -1993,6 +1993,9 @@
     // Settings -> Apps -> Gear -> Special access
     SPECIAL_ACCESS = 351;
 
+    // Logs that the user docks window via shortcut key.
+    WINDOW_DOCK_SHORTCUTS = 352;
+
     // Add new aosp constants above this line.
     // END OF AOSP CONSTANTS
   }