Merge "Place handwriting surface below gesture monitors"

import static android.os.InputConstants.DEFAULT_DISPATCHING_TIMEOUT_MILLIS;

import android.annotation.NonNull;

import android.graphics.Rect;

import android.os.Process;

import android.view.InputApplicationHandle;

import android.view.InputChannel;

    public static final String TAG = HandwritingEventReceiverSurface.class.getSimpleName();

    static final boolean DEBUG = HandwritingModeController.DEBUG;

    private final int mClientPid;

    private final int mClientUid;

    // Place the layer below the highest layer to place it under gesture monitors. If the surface

    // is above gesture monitors, then edge-back and swipe-up gestures won't work when this surface

    // is intercepting.

    // TODO(b/217538817): Specify the ordering in WM by usage.

    private static final int HANDWRITING_SURFACE_LAYER = Integer.MAX_VALUE - 1;

    private final InputApplicationHandle mApplicationHandle;

    private final InputWindowHandle mWindowHandle;

    HandwritingEventReceiverSurface(String name, int displayId, @NonNull SurfaceControl sc,

            @NonNull InputChannel inputChannel) {

        // Initialized the window as being owned by the system.

        mClientPid = Process.myPid();

        mClientUid = Process.myUid();

        mApplicationHandle = new InputApplicationHandle(null, name,

                DEFAULT_DISPATCHING_TIMEOUT_MILLIS);

        mWindowHandle.focusable = false;

        mWindowHandle.hasWallpaper = false;

        mWindowHandle.paused = false;

        mWindowHandle.ownerPid = mClientPid;

        mWindowHandle.ownerUid = mClientUid;

        mWindowHandle.ownerPid = Process.myPid();

        mWindowHandle.ownerUid = Process.myUid();

        mWindowHandle.inputFeatures = WindowManager.LayoutParams.INPUT_FEATURE_SPY

                | WindowManager.LayoutParams.INPUT_FEATURE_INTERCEPTS_STYLUS;

        mWindowHandle.scaleFactor = 1.0f;

        mWindowHandle.trustedOverlay = true;

        mWindowHandle.replaceTouchableRegionWithCrop(null /* use this surface as crop */);

        mWindowHandle.replaceTouchableRegionWithCrop(null /* use this surface's bounds */);

        final SurfaceControl.Transaction t = new SurfaceControl.Transaction();

        t.setInputWindowInfo(mInputSurface, mWindowHandle);

        t.setLayer(mInputSurface, Integer.MAX_VALUE);

        t.setLayer(mInputSurface, HANDWRITING_SURFACE_LAYER);

        t.setPosition(mInputSurface, 0, 0);

        // Use an arbitrarily large crop that is positioned at the origin. The crop determines the

        // bounds and the coordinate space of the input events, so it must start at the origin to

        // receive input in display space.

        // TODO(b/210039666): fix this in SurfaceFlinger and avoid the hack.

        t.setCrop(mInputSurface, new Rect(0, 0, 10000, 10000));

        t.setCrop(mInputSurface, null /* crop to parent surface */);

        t.show(mInputSurface);

        t.apply();