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Commit 473d7091 authored by Chilun's avatar Chilun
Browse files

Implement DisplayWindowPolicyController 

Implement DisplayWindowPolicyController to control the policies of the
windows that can be displayed on the virtual display.

Bug: 201712607
Test: manual
Change-Id: Ie7f947cfa79d54a86badd81c8339a09c53a87b3c
parent 31c1b8bc

services/companion/Android.bp

+4 −1
Original line number Diff line number Diff line
@@ -24,5 +24,8 @@ java_library_static { 
        type: "stream",

    },

    srcs: [":services.companion-sources"],

    libs: ["services.core"],

    libs: [

        "app-compat-annotations",

        "services.core",

    ],

}

services/companion/java/com/android/server/companion/virtual/GenericWindowPolicyController.java

0 → 100644
+94 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2021 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */



package com.android.server.companion.virtual;



import static android.view.WindowManager.LayoutParams.FLAG_SECURE;

import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;



import android.annotation.NonNull;

import android.app.compat.CompatChanges;

import android.compat.annotation.ChangeId;

import android.compat.annotation.EnabledSince;

import android.content.ComponentName;

import android.content.pm.ActivityInfo;

import android.os.Build;

import android.os.UserHandle;

import android.window.DisplayWindowPolicyController;



import java.util.List;





/**

 * A controller to control the policies of the windows that can be displayed on the virtual display.

 */

class GenericWindowPolicyController extends DisplayWindowPolicyController {



    /**

     * If required, allow the secure activity to display on remote device since

     * {@link android.os.Build.VERSION_CODES#TIRAMISU}.

     */

    @ChangeId

    @EnabledSince(targetSdkVersion = Build.VERSION_CODES.TIRAMISU)

    public static final long ALLOW_SECURE_ACTIVITY_DISPLAY_ON_REMOTE_DEVICE = 201712607L;



    GenericWindowPolicyController(int windowFlags, int systemWindowFlags) {

        setInterestedWindowFlags(windowFlags, systemWindowFlags);

    }



    @Override

    public boolean canContainActivities(@NonNull List<ActivityInfo> activities) {

        // Can't display all the activities if any of them don't want to be displayed.

        final int activityCount = activities.size();

        for (int i = 0; i < activityCount; i++) {

            final ActivityInfo aInfo = activities.get(i);

            if ((aInfo.flags & ActivityInfo.FLAG_CAN_DISPLAY_ON_REMOTE_DEVICES) == 0) {

                return false;

            }

        }

        return true;

    }



    @Override

    public boolean keepActivityOnWindowFlagsChanged(ActivityInfo activityInfo, int windowFlags,

            int systemWindowFlags) {

        if ((activityInfo.flags & ActivityInfo.FLAG_CAN_DISPLAY_ON_REMOTE_DEVICES) == 0) {

            return false;

        }

        if (!CompatChanges.isChangeEnabled(ALLOW_SECURE_ACTIVITY_DISPLAY_ON_REMOTE_DEVICE,

                activityInfo.packageName,

                UserHandle.getUserHandleForUid(activityInfo.applicationInfo.uid))) {

            // TODO(b/201712607): Add checks for the apps that use SurfaceView#setSecure.

            if ((windowFlags & FLAG_SECURE) != 0) {

                return false;

            }

            if ((systemWindowFlags & SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS) != 0) {

                return false;

            }

        }

        return true;

    }



    @Override

    public void onTopActivityChanged(ComponentName topActivity, int uid) {



    }



    @Override

    public void onRunningAppsChanged(int[] runningUids) {



    }

}

services/companion/java/com/android/server/companion/virtual/VirtualDeviceManagerService.java

+7 −2
Original line number Diff line number Diff line
@@ -16,6 +16,9 @@ 


package com.android.server.companion.virtual;



import static android.view.WindowManager.LayoutParams.FLAG_SECURE;

import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;



import android.annotation.NonNull;

import android.annotation.Nullable;

import android.annotation.SuppressLint;
@@ -131,11 +134,14 @@ public class VirtualDeviceManagerService extends SystemService { 


        private final AssociationInfo mAssociationInfo;

        private final int mOwnerUid;

        private final GenericWindowPolicyController mGenericWindowPolicyController;

        private final ArrayList<Integer> mDisplayIds = new ArrayList<>();



        private VirtualDeviceImpl(int ownerUid, IBinder token, AssociationInfo associationInfo) {

            mOwnerUid = ownerUid;

            mAssociationInfo = associationInfo;

            mGenericWindowPolicyController = new GenericWindowPolicyController(FLAG_SECURE,

                    SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);

            try {

                token.linkToDeath(this, 0);

            } catch (RemoteException e) {
@@ -167,8 +173,7 @@ public class VirtualDeviceManagerService extends SystemService { 
                        "Virtual device already have a virtual display with ID " + displayId);

            }

            mDisplayIds.add(displayId);

            // TODO(b/201712607): Return the corresponding DisplayWindowPolicyController.

            return null;

            return mGenericWindowPolicyController;

        }



        void onVirtualDisplayRemovedLocked(int displayId) {