Map split from the current running app to META+CTRL+DPAD_LEFT and META+CTRL+DPAD_RIGHT

Fixes: 246661484
Test: https://recall.googleplex.com/projects/f4cc906f-d337-414e-aea8-d5434a0c6e88/sessions/06cc05b5-c032-40f3-af8b-3b90860d2f37
Change-Id: I8b293a0eb7e198fc2ff25c4c5a57dbd58f6be2f4

core/java/com/android/internal/statusbar/IStatusBar.aidl

@@ -330,4 +330,11 @@ oneway interface IStatusBar
 
     /** Called when requested to go to fullscreen from the active split app. */
     void goToFullscreenFromSplit();
+
+    /**
+     * Enters stage split from a current running app.
+     *
+     * @param leftOrTop indicates where the stage split is.
+     */
+    void enterStageSplitFromRunningApp(boolean leftOrTop);
 }

packages/SystemUI/src/com/android/systemui/recents/OverviewProxyService.java

@@ -565,13 +565,25 @@ public class OverviewProxyService implements CallbackController<OverviewProxyLis
         statusBarWinController.registerCallback(mStatusBarWindowCallback);
         mScreenshotHelper = new ScreenshotHelper(context);
 
-        // Listen for tracing state changes
         commandQueue.addCallback(new CommandQueue.Callbacks() {
+
+            // Listen for tracing state changes
             @Override
             public void onTracingStateChanged(boolean enabled) {
                 mSysUiState.setFlag(SYSUI_STATE_TRACING_ENABLED, enabled)
                         .commitUpdate(mContext.getDisplayId());
             }
+
+            @Override
+            public void enterStageSplitFromRunningApp(boolean leftOrTop) {
+                if (mOverviewProxy != null) {
+                    try {
+                        mOverviewProxy.enterStageSplitFromRunningApp(leftOrTop);
+                    } catch (RemoteException e) {
+                        Log.w(TAG_OPS, "Unable to enter stage split from the current running app");
+                    }
+                }
+            }
         });
         mCommandQueue = commandQueue;
 

packages/SystemUI/src/com/android/systemui/statusbar/CommandQueue.java

@@ -165,6 +165,7 @@ public class CommandQueue extends IStatusBar.Stub implements
     private static final int MSG_TILE_SERVICE_REQUEST_LISTENING_STATE = 68 << MSG_SHIFT;
     private static final int MSG_SHOW_REAR_DISPLAY_DIALOG = 69 << MSG_SHIFT;
     private static final int MSG_GO_TO_FULLSCREEN_FROM_SPLIT = 70 << MSG_SHIFT;
+    private static final int MSG_ENTER_STAGE_SPLIT_FROM_RUNNING_APP = 71 << MSG_SHIFT;
 
     public static final int FLAG_EXCLUDE_NONE = 0;
     public static final int FLAG_EXCLUDE_SEARCH_PANEL = 1 << 0;
@@ -484,6 +485,11 @@ public class CommandQueue extends IStatusBar.Stub implements
          * @see IStatusBar#goToFullscreenFromSplit
          */
         default void goToFullscreenFromSplit() {}
+
+        /**
+         * @see IStatusBar#enterStageSplitFromRunningApp
+         */
+        default void enterStageSplitFromRunningApp(boolean leftOrTop) {}
     }
 
     public CommandQueue(Context context) {
@@ -1244,6 +1250,14 @@ public class CommandQueue extends IStatusBar.Stub implements
         }
     }
 
+    @Override
+    public void enterStageSplitFromRunningApp(boolean leftOrTop) {
+        synchronized (mLock) {
+            mHandler.obtainMessage(MSG_ENTER_STAGE_SPLIT_FROM_RUNNING_APP,
+                    leftOrTop).sendToTarget();
+        }
+    }
+
     @Override
     public void requestAddTile(
             @NonNull ComponentName componentName,
@@ -1755,6 +1769,11 @@ public class CommandQueue extends IStatusBar.Stub implements
                         mCallbacks.get(i).goToFullscreenFromSplit();
                     }
                     break;
+                case MSG_ENTER_STAGE_SPLIT_FROM_RUNNING_APP:
+                    for (int i = 0; i < mCallbacks.size(); i++) {
+                        mCallbacks.get(i).enterStageSplitFromRunningApp((Boolean) msg.obj);
+                    }
+                    break;
             }
         }
     }

services/core/java/com/android/server/policy/PhoneWindowManager.java

@@ -2929,6 +2929,18 @@ public class PhoneWindowManager implements WindowManagerPolicy {
                     return key_consumed;
                 }
                 break;
+            case KeyEvent.KEYCODE_DPAD_LEFT:
+                if (down && event.isMetaPressed() && event.isCtrlPressed() && repeatCount == 0) {
+                    enterStageSplitFromRunningApp(true /* leftOrTop */);
+                    return key_consumed;
+                }
+                break;
+            case KeyEvent.KEYCODE_DPAD_RIGHT:
+                if (down && event.isMetaPressed() && event.isCtrlPressed() && repeatCount == 0) {
+                    enterStageSplitFromRunningApp(false /* leftOrTop */);
+                    return key_consumed;
+                }
+                break;
             case KeyEvent.KEYCODE_SLASH:
                 if (down && repeatCount == 0 && event.isMetaPressed() && !keyguardOn) {
                     toggleKeyboardShortcutsMenu(event.getDeviceId());
@@ -3583,6 +3595,13 @@ public class PhoneWindowManager implements WindowManagerPolicy {
         }
     }
 
+    private void enterStageSplitFromRunningApp(boolean leftOrTop) {
+        StatusBarManagerInternal statusbar = getStatusBarManagerInternal();
+        if (statusbar != null) {
+            statusbar.enterStageSplitFromRunningApp(leftOrTop);
+        }
+    }
+
     void launchHomeFromHotKey(int displayId) {
         launchHomeFromHotKey(displayId, true /* awakenFromDreams */, true /*respectKeyguard*/);
     }

services/core/java/com/android/server/statusbar/StatusBarManagerInternal.java

@@ -210,4 +210,11 @@ public interface StatusBarManagerInternal {
      * Called when requested to go to fullscreen from the active split app.
      */
     void goToFullscreenFromSplit();
+
+    /**
+     * Enters stage split from a current running app.
+     *
+     * @see com.android.internal.statusbar.IStatusBar#enterStageSplitFromRunningApp
+     */
+    void enterStageSplitFromRunningApp(boolean leftOrTop);
 }

services/core/java/com/android/server/statusbar/StatusBarManagerService.java

@@ -735,6 +735,15 @@ public class StatusBarManagerService extends IStatusBarService.Stub implements D
                 } catch (RemoteException ex) { }
             }
         }
+
+        @Override
+        public void enterStageSplitFromRunningApp(boolean leftOrTop) {
+            if (mBar != null) {
+                try {
+                    mBar.enterStageSplitFromRunningApp(leftOrTop);
+                } catch (RemoteException ex) { }
+            }
+        }
     };
 
     private final GlobalActionsProvider mGlobalActionsProvider = new GlobalActionsProvider() {