Merge "Add VDM.createVirtualDisplay"

package android.companion.virtual;

import android.annotation.IntDef;

import android.annotation.NonNull;

import android.annotation.Nullable;

import android.annotation.RequiresPermission;

import android.annotation.SuppressLint;

import android.annotation.SystemApi;

import android.annotation.SystemService;

import android.companion.AssociationInfo;

import android.content.Context;

import android.graphics.Point;

import android.hardware.display.DisplayManager;

import android.hardware.display.VirtualDisplay;

import android.hardware.display.VirtualDisplayConfig;

import android.hardware.input.VirtualKeyboard;

import android.hardware.input.VirtualMouse;

import android.hardware.input.VirtualTouchscreen;

import android.os.Binder;

import android.os.Handler;

import android.os.IBinder;

import android.os.RemoteException;

import android.view.Surface;

import java.lang.annotation.ElementType;

import java.lang.annotation.Retention;

import java.lang.annotation.RetentionPolicy;

import java.lang.annotation.Target;

/**

 * System level service for managing virtual devices.

    private static final boolean DEBUG = false;

    private static final String LOG_TAG = "VirtualDeviceManager";

    /** @hide */

    @IntDef(prefix = "DISPLAY_FLAG_",

            flag = true,

            value = {DISPLAY_FLAG_TRUSTED})

    @Retention(RetentionPolicy.SOURCE)

    @Target({ElementType.TYPE_PARAMETER, ElementType.TYPE_USE})

    public @interface DisplayFlags {}

    /**

     * Indicates that the display is trusted to show system decorations and receive inputs without

     * users' touch.

     *

     * @see DisplayManager#VIRTUAL_DISPLAY_FLAG_TRUSTED

     * @hide  // TODO(b/194949534): Unhide this API

     */

    public static final int DISPLAY_FLAG_TRUSTED = 1;

    private static final int DEFAULT_VIRTUAL_DISPLAY_FLAGS =

            DisplayManager.VIRTUAL_DISPLAY_FLAG_PUBLIC

                    | DisplayManager.VIRTUAL_DISPLAY_FLAG_ROTATES_WITH_CONTENT

                    | DisplayManager.VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY

                    | DisplayManager.VIRTUAL_DISPLAY_FLAG_DESTROY_CONTENT_ON_REMOVAL

                    | DisplayManager.VIRTUAL_DISPLAY_FLAG_SUPPORTS_TOUCH

                    | DisplayManager.VIRTUAL_DISPLAY_FLAG_OWN_DISPLAY_GROUP;

    private final IVirtualDeviceManager mService;

    private final Context mContext;

            mVirtualDevice = virtualDevice;

        }

        /**

         * Creates a virtual display for this virtual device. All displays created on the same

         * device belongs to the same display group.

         *

         * @param width The width of the virtual display in pixels, must be greater than 0.

         * @param height The height of the virtual display in pixels, must be greater than 0.

         * @param densityDpi The density of the virtual display in dpi, must be greater than 0.

         * @param surface The surface to which the content of the virtual display should

         * be rendered, or null if there is none initially. The surface can also be set later using

         * {@link VirtualDisplay#setSurface(Surface)}.

         * @param flags Either 0, or {@link #DISPLAY_FLAG_TRUSTED}.

         * @param callback Callback to call when the state of the {@link VirtualDisplay} changes

         * @param handler The handler on which the listener should be invoked, or null

         * if the listener should be invoked on the calling thread's looper.

         * @return The newly created virtual display, or {@code null} if the application could

         * not create the virtual display.

         *

         * @see DisplayManager#createVirtualDisplay

         * @hide

         */

        // TODO(b/194949534): Unhide this API

        // Suppress "ExecutorRegistration" because DisplayManager.createVirtualDisplay takes a

        // handler

        @SuppressLint("ExecutorRegistration")

        @Nullable

        public VirtualDisplay createVirtualDisplay(

                int width,

                int height,

                int densityDpi,

                @Nullable Surface surface,

                @DisplayFlags int flags,

                @Nullable Handler handler,

                @Nullable VirtualDisplay.Callback callback) {

            // TODO(b/205343547): Handle display groups properly instead of creating a new display

            //  group for every new virtual display created using this API.

            // belongs to the same display group.

            DisplayManager displayManager = mContext.getSystemService(DisplayManager.class);

            // DisplayManager will call into VirtualDeviceManagerInternal to register the

            // created displays.

            return displayManager.createVirtualDisplay(

                    mVirtualDevice,

                    new VirtualDisplayConfig.Builder(

                            getVirtualDisplayName(), width, height, densityDpi)

                            .setSurface(surface)

                            .setFlags(getVirtualDisplayFlags(flags))

                            .build(),

                    callback,

                    handler);

        }

        /**

         * Closes the virtual device, stopping and tearing down any virtual displays,

         * audio policies, and event injection that's currently in progress.

                throw e.rethrowFromSystemServer();

            }

        }

        private int getVirtualDisplayFlags(@DisplayFlags int flags) {

            int virtualDisplayFlags = DEFAULT_VIRTUAL_DISPLAY_FLAGS;

            if ((flags & DISPLAY_FLAG_TRUSTED) != 0) {

                virtualDisplayFlags |= DisplayManager.VIRTUAL_DISPLAY_FLAG_TRUSTED;

            }

            return virtualDisplayFlags;

        }

        private String getVirtualDisplayName() {

            try {

                // Currently this just use the association ID, which means all of the virtual

                // displays created using the same virtual device will have the same name. The name

                // should only be used for informational purposes, and not for identifying the

                // display in code.

                return "VirtualDevice_" + mVirtualDevice.getAssociationId();

            } catch (RemoteException e) {

                throw e.rethrowFromSystemServer();

            }

        }

    }

}

    @VisibleForTesting

    final List<Integer> mVirtualDisplayIds = new ArrayList<>();

    private final OnDeviceCloseListener mListener;

    private final IBinder mAppToken;

    /**

     * A mapping from the virtual display ID to its corresponding

        mContext = context;

        mAssociationInfo = associationInfo;

        mOwnerUid = ownerUid;

        mAppToken = token;

        if (inputController == null) {

            mInputController = new InputController(mVirtualDeviceLock);

        } else {

    @Override // Binder call

    public void close() {

        mListener.onClose(mAssociationInfo.getId());

        mAppToken.unlinkToDeath(this, 0);

        mInputController.close();

    }