New VerifiedInputEvent api

The Verified{Input/Key/Motion}Event api are the same as
{Input/Key/Motion}Event api.
The VerifiedMotion class is the same as the MotionEvent class, but
contains less information. It only contains the information that the
system is able to verify.
Same applies to VerifiedKeyEvent.

The class VerifiedInputEvent contains common information applicable to
both Key and Motion.

Test: atest VerifiedKeyEventTest VerifiedMotionEventTest
Bug: 134977432
Change-Id: I4770104eb4c025263da7efeea9c7a658dff74ac9

1 files changed, 162 insertions, 0 deletions

diff --git a/core/java/android/view/VerifiedInputEvent.java b/core/java/android/view/VerifiedInputEvent.java
new file mode 100644
index 000000000000..531b3ed39fc3
--- /dev/null
+++ b/core/java/android/view/VerifiedInputEvent.java
@@ -0,0 +1,162 @@
+/*
+ * 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.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()
+     * @see KeyEvent#getEventTimeNano()
+     * @see MotionEvent#getEventTimeNano()
+     */
+    @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.");
+        }
+    };
+}