[RESTRICT AUTOMERGE] Associate SystemUiContext with DisplayContent

Before this CL, SystemUiContexts were fixed to the Display metrics
when the SystemUiContexts were created. It is the same mechanism
as DisplayContext but applies to SystemUiContexts unexpectedly.
This CL makes SystemUiContexts associate with DisplayContent with
the corresponding display ID. In this way, SystemUiContext would
receive updates when there is a Display property change.

Bug: 194262507
Bug: 191064581
Test: atest InputMethodMenuControllerTest WindowContextControllerTest

Change-Id: Idd74da965c18bdbf8912bd45e89be21f652dcf93

1 files changed, 91 insertions, 0 deletions

diff --git a/core/java/android/window/WindowTokenClient.java b/core/java/android/window/WindowTokenClient.java
index f3e3859b4256..b331a9e81e27 100644
--- a/core/java/android/window/WindowTokenClient.java
+++ b/core/java/android/window/WindowTokenClient.java
@@ -21,6 +21,7 @@ import static android.window.ConfigurationHelper.isDifferentDisplay;
 import static android.window.ConfigurationHelper.shouldUpdateResources;
 
 import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.app.ActivityThread;
 import android.app.IWindowToken;
 import android.app.ResourcesManager;
@@ -31,7 +32,11 @@ import android.os.Build;
 import android.os.Bundle;
 import android.os.Debug;
 import android.os.IBinder;
+import android.os.RemoteException;
 import android.util.Log;
+import android.view.IWindowManager;
+import android.view.WindowManager.LayoutParams.WindowType;
+import android.view.WindowManagerGlobal;
 
 import com.android.internal.annotations.VisibleForTesting;
 
@@ -59,10 +64,14 @@ public class WindowTokenClient extends IWindowToken.Stub {
 
     private final ResourcesManager mResourcesManager = ResourcesManager.getInstance();
 
+    private IWindowManager mWms;
+
     private final Configuration mConfiguration = new Configuration();
 
     private boolean mShouldDumpConfigForIme;
 
+    private boolean mAttachToWindowContainer;
+
     /**
      * Attaches {@code context} to this {@link WindowTokenClient}. Each {@link WindowTokenClient}
      * can only attach one {@link Context}.
@@ -84,6 +93,88 @@ public class WindowTokenClient extends IWindowToken.Stub {
     }
 
     /**
+     * Attaches this {@link WindowTokenClient} to a {@link com.android.server.wm.DisplayArea}.
+     *
+     * @param type The window type of the {@link WindowContext}
+     * @param displayId The {@link Context#getDisplayId() ID of display} to associate with
+     * @param options The window context launched option
+     * @return {@code true} if attaching successfully.
+     */
+    public boolean attachToDisplayArea(@WindowType int type, int displayId,
+            @Nullable Bundle options) {
+        try {
+            final Configuration configuration = getWindowManagerService()
+                    .attachWindowContextToDisplayArea(this, type, displayId, options);
+            if (configuration == null) {
+                return false;
+            }
+            onConfigurationChanged(configuration, displayId, false /* shouldReportConfigChange */);
+            mAttachToWindowContainer = true;
+            return true;
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Attaches this {@link WindowTokenClient} to a {@code DisplayContent}.
+     *
+     * @param displayId The {@link Context#getDisplayId() ID of display} to associate with
+     * @return {@code true} if attaching successfully.
+     */
+    public boolean attachToDisplayContent(int displayId) {
+        final IWindowManager wms = getWindowManagerService();
+        // #createSystemUiContext may call this method before WindowManagerService is initialized.
+        if (wms == null) {
+            return false;
+        }
+        try {
+            final Configuration configuration = wms.attachToDisplayContent(this, displayId);
+            if (configuration == null) {
+                return false;
+            }
+            onConfigurationChanged(configuration, displayId, false /* shouldReportConfigChange */);
+            mAttachToWindowContainer = true;
+            return true;
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Attaches this {@link WindowTokenClient} to a {@code windowToken}.
+     *
+     * @param windowToken the window token to associated with
+     */
+    public void attachToWindowToken(IBinder windowToken) {
+        try {
+            getWindowManagerService().attachWindowContextToWindowToken(this, windowToken);
+            mAttachToWindowContainer = true;
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /** Detaches this {@link WindowTokenClient} from associated WindowContainer if there's one. */
+    public void detachFromWindowContainerIfNeeded() {
+        if (!mAttachToWindowContainer) {
+            return;
+        }
+        try {
+            getWindowManagerService().detachWindowContextFromWindowContainer(this);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    private IWindowManager getWindowManagerService() {
+        if (mWms == null) {
+            mWms = WindowManagerGlobal.getWindowManagerService();
+        }
+        return mWms;
+    }
+
+    /**
      * Called when {@link Configuration} updates from the server side receive.
      *
      * @param newConfig the updated {@link Configuration}