Introduce WM#LayoutParams mWindowContextToken

The window context token is passed to the server side by attaching
to the layout params in WM#addView to receive configuration changes.

Bug: 159767464
Bug: 153369119
Test: atest
WindowContextTest#testCreateWindowContextWindowManagerAttachClientToken

Change-Id: I658b09727b42eb9c2fa2cea63f8a312761e0a9aa

1 files changed, 18 insertions, 0 deletions

diff --git a/core/java/android/view/WindowManager.java b/core/java/android/view/WindowManager.java
index 6d88d637dc24..4975f91e81ab 100644
--- a/core/java/android/view/WindowManager.java
+++ b/core/java/android/view/WindowManager.java
@@ -93,6 +93,7 @@ import android.compat.annotation.UnsupportedAppUsage;
 import android.content.ClipData;
 import android.content.Context;
 import android.content.pm.ActivityInfo;
+import android.content.res.Configuration;
 import android.graphics.PixelFormat;
 import android.graphics.Point;
 import android.graphics.Rect;
@@ -2772,6 +2773,16 @@ public interface WindowManager extends ViewManager {
         public IBinder token = null;
 
         /**
+         * The token of {@link android.app.WindowContext}. It is usually a
+         * {@link android.app.WindowTokenClient} and is used for updating
+         * {@link android.content.res.Resources} from {@link Configuration} propagated from the
+         * server side.
+         *
+         * @hide
+         */
+        public IBinder mWindowContextToken = null;
+
+        /**
          * Name of the package owning this window.
          */
         public String packageName = null;
@@ -3445,6 +3456,7 @@ public interface WindowManager extends ViewManager {
             out.writeFloat(buttonBrightness);
             out.writeInt(rotationAnimation);
             out.writeStrongBinder(token);
+            out.writeStrongBinder(mWindowContextToken);
             out.writeString(packageName);
             TextUtils.writeToParcel(mTitle, out, parcelableFlags);
             out.writeInt(screenOrientation);
@@ -3513,6 +3525,7 @@ public interface WindowManager extends ViewManager {
             buttonBrightness = in.readFloat();
             rotationAnimation = in.readInt();
             token = in.readStrongBinder();
+            mWindowContextToken = in.readStrongBinder();
             packageName = in.readString();
             mTitle = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
             screenOrientation = in.readInt();
@@ -3674,6 +3687,11 @@ public interface WindowManager extends ViewManager {
                 // already have one.
                 token = o.token;
             }
+            if (mWindowContextToken == null) {
+                // NOTE: token only copied if the recipient doesn't
+                // already have one.
+                mWindowContextToken = o.mWindowContextToken;
+            }
             if (packageName == null) {
                 // NOTE: packageName only copied if the recipient doesn't
                 // already have one.