Merge "Add setTriggerBack interface to BackCallback." into tm-qpr-dev am: baa507a5f8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19995003

Change-Id: Icdb32540461a795f172104c6e4499703ecdd9e52
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

packages/SystemUI/plugin/src/com/android/systemui/plugins/NavigationEdgeBackPlugin.java

@@ -61,5 +61,13 @@ public interface NavigationEdgeBackPlugin extends Plugin {
 
         /** Indicates that the gesture was cancelled and the system should not go back. */
         void cancelBack();
+
+        /**
+         * Indicates if back will be triggered if committed in current state.
+         *
+         * @param triggerBack if back will be triggered in current state.
+         */
+        // TODO(b/247883311): Remove default impl once SwipeBackGestureHandler overrides this.
+        default void setTriggerBack(boolean triggerBack) {}
     }
 }

packages/SystemUI/src/com/android/systemui/navigationbar/gestural/EdgeBackGestureHandler.java

@@ -303,6 +303,13 @@ public class EdgeBackGestureHandler extends CurrentUserTracker
                     mOverviewProxyService.notifyBackAction(false, (int) mDownPoint.x,
                             (int) mDownPoint.y, false /* isButton */, !mIsOnLeftEdge);
                 }
+
+                @Override
+                public void setTriggerBack(boolean triggerBack) {
+                    if (mBackAnimation != null) {
+                        mBackAnimation.setTriggerBack(triggerBack);
+                    }
+                }
             };
 
     private final SysUiState.SysUiStateCallback mSysUiStateCallback =

packages/SystemUI/src/com/android/systemui/navigationbar/gestural/NavigationBarEdgePanel.java

@@ -880,6 +880,7 @@ public class NavigationBarEdgePanel extends View implements NavigationEdgeBackPl
             // Whenever the trigger back state changes the existing translation animation should be
             // cancelled
             mTranslationAnimation.cancel();
+            mBackCallback.setTriggerBack(mTriggerBack);
         }
     }