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/*
* Copyright (C) 2020 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 android.view;
import static java.lang.annotation.RetentionPolicy.SOURCE;
import android.annotation.IntDef;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.annotation.SuppressLint;
import android.os.Parcel;
import android.os.Parcelable;
import java.lang.annotation.Retention;
/**
* Base class for verified events.
* Verified events contain the subset of an InputEvent that the system can verify.
* Data contained inside VerifiedInputEvent's should be considered trusted and contain only
* the original event data that first came from the system.
*
* @see android.hardware.input.InputManager#verifyInputEvent(InputEvent)
*/
@SuppressLint("ParcelNotFinal")
public abstract class VerifiedInputEvent implements Parcelable {
private static final String TAG = "VerifiedInputEvent";
/** @hide */
protected static final int VERIFIED_KEY = 1;
/** @hide */
protected static final int VERIFIED_MOTION = 2;
/** @hide */
@Retention(SOURCE)
@IntDef(prefix = "VERIFIED", value = {VERIFIED_KEY, VERIFIED_MOTION})
public @interface VerifiedInputEventType {};
@VerifiedInputEventType
private int mType;
private int mDeviceId;
private long mEventTimeNanos;
private int mSource;
private int mDisplayId;
/** @hide */
protected VerifiedInputEvent(int type, int deviceId, long eventTimeNanos, int source,
int displayId) {
mType = type;
mDeviceId = deviceId;
mEventTimeNanos = eventTimeNanos;
mSource = source;
mDisplayId = displayId;
}
/** @hide */
protected VerifiedInputEvent(@NonNull Parcel in, int expectedType) {
mType = in.readInt();
if (mType != expectedType) {
throw new IllegalArgumentException("Unexpected input event type token in parcel.");
}
mDeviceId = in.readInt();
mEventTimeNanos = in.readLong();
mSource = in.readInt();
mDisplayId = in.readInt();
}
/**
* Get the id of the device that generated this event.
*
* @see InputEvent#getDeviceId()
*/
public int getDeviceId() {
return mDeviceId;
}
/**
* Get the time this event occurred, in the {@link android.os.SystemClock#uptimeMillis()}
* time base.
*
* @see InputEvent#getEventTime()
*/
@SuppressLint("MethodNameUnits")
public long getEventTimeNanos() {
return mEventTimeNanos;
}
/**
* Get the source of the event.
*
* @see InputEvent#getSource()
*/
public int getSource() {
return mSource;
}
/**
* Get the display id that is associated with this event.
*
* @see Display#getDisplayId()
*/
public int getDisplayId() {
return mDisplayId;
}
/** {@inheritDoc} */
@Override
public void writeToParcel(@NonNull Parcel dest, int flags) {
dest.writeInt(mType);
dest.writeInt(mDeviceId);
dest.writeLong(mEventTimeNanos);
dest.writeInt(mSource);
dest.writeInt(mDisplayId);
}
/** {@inheritDoc} */
@Override
public int describeContents() {
return 0;
}
private static int peekInt(@NonNull Parcel parcel) {
final int initialDataPosition = parcel.dataPosition();
int data = parcel.readInt();
parcel.setDataPosition(initialDataPosition);
return data;
}
public static final @NonNull Parcelable.Creator<VerifiedInputEvent> CREATOR =
new Parcelable.Creator<VerifiedInputEvent>() {
@Override
public VerifiedInputEvent[] newArray(int size) {
return new VerifiedInputEvent[size];
}
@Override
public VerifiedInputEvent createFromParcel(@NonNull Parcel in) {
final int type = peekInt(in);
if (type == VERIFIED_KEY) {
return VerifiedKeyEvent.CREATOR.createFromParcel(in);
} else if (type == VERIFIED_MOTION) {
return VerifiedMotionEvent.CREATOR.createFromParcel(in);
}
throw new IllegalArgumentException("Unexpected input event type in parcel.");
}
};
@Override
public boolean equals(@Nullable Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
@SuppressWarnings("unchecked")
VerifiedInputEvent that = (VerifiedInputEvent) o;
return mType == that.mType
&& getDeviceId() == that.getDeviceId()
&& getEventTimeNanos() == that.getEventTimeNanos()
&& getSource() == that.getSource()
&& getDisplayId() == that.getDisplayId();
}
@Override
public int hashCode() {
int _hash = 1;
_hash = 31 * _hash + mType;
_hash = 31 * _hash + getDeviceId();
_hash = 31 * _hash + Long.hashCode(getEventTimeNanos());
_hash = 31 * _hash + getSource();
_hash = 31 * _hash + getDisplayId();
return _hash;
}
}
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