1 files changed, 21 insertions, 1 deletions
diff --git a/src/com/android/launcher3/util/DisplayController.java b/src/com/android/launcher3/util/DisplayController.java
index 3d455d8509..a3261b2623 100644
--- a/src/com/android/launcher3/util/DisplayController.java
+++ b/src/com/android/launcher3/util/DisplayController.java
@@ -23,6 +23,7 @@ import static com.android.launcher3.Utilities.dpiFromPx;
 import static com.android.launcher3.config.FeatureFlags.ENABLE_TRANSIENT_TASKBAR;
 import static com.android.launcher3.config.FeatureFlags.FORCE_PERSISTENT_TASKBAR;
 import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+import static com.android.launcher3.util.FlagDebugUtils.appendFlag;
 import static com.android.launcher3.util.window.WindowManagerProxy.MIN_TABLET_WIDTH;
 
 import android.annotation.SuppressLint;
@@ -55,6 +56,7 @@ import java.util.Collections;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
+import java.util.StringJoiner;
 
 /**
  * Utility class to cache properties of default display to avoid a system RPC on every call.
@@ -66,6 +68,9 @@ public class DisplayController implements ComponentCallbacks, SafeCloseable {
     private static final boolean DEBUG = false;
     private static boolean sTransientTaskbarStatusForTests;
 
+    // TODO(b/254119092) remove all logs with this tag
+    public static final String TASKBAR_NOT_DESTROYED_TAG = "b/254119092";
+
     public static final MainThreadInitializedObject<DisplayController> INSTANCE =
             new MainThreadInitializedObject<>(DisplayController::new);
 
@@ -206,6 +211,7 @@ public class DisplayController implements ComponentCallbacks, SafeCloseable {
     @Override
     @TargetApi(Build.VERSION_CODES.S)
     public final void onConfigurationChanged(Configuration config) {
+        Log.d(TASKBAR_NOT_DESTROYED_TAG, "DisplayController#onConfigurationChanged: " + config);
         Display display = mWindowContext.getDisplay();
         if (config.densityDpi != mInfo.densityDpi
                 || config.fontScale != mInfo.fontScale
@@ -272,7 +278,7 @@ public class DisplayController implements ComponentCallbacks, SafeCloseable {
             change |= CHANGE_SUPPORTED_BOUNDS;
         }
         if (DEBUG) {
-            Log.d(TAG, "handleInfoChange - change: 0b" + Integer.toBinaryString(change));
+            Log.d(TAG, "handleInfoChange - change: " + getChangeFlagsString(change));
         }
 
         if (change != 0) {
@@ -392,6 +398,20 @@ public class DisplayController implements ComponentCallbacks, SafeCloseable {
     }
 
     /**
+     * Returns the given binary flags as a human-readable string.
+     * @see #CHANGE_ALL
+     */
+    public String getChangeFlagsString(int change) {
+        StringJoiner result = new StringJoiner("|");
+        appendFlag(result, change, CHANGE_ACTIVE_SCREEN, "CHANGE_ACTIVE_SCREEN");
+        appendFlag(result, change, CHANGE_ROTATION, "CHANGE_ROTATION");
+        appendFlag(result, change, CHANGE_DENSITY, "CHANGE_DENSITY");
+        appendFlag(result, change, CHANGE_SUPPORTED_BOUNDS, "CHANGE_SUPPORTED_BOUNDS");
+        appendFlag(result, change, CHANGE_NAVIGATION_MODE, "CHANGE_NAVIGATION_MODE");
+        return result.toString();
+    }
+
+    /**
      * Dumps the current state information
      */
     public void dump(PrintWriter pw) {