82 lines
2.8 KiB
Java
82 lines
2.8 KiB
Java
|
/*
|
||
|
|
* Copyright (C) 2018 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 android.content.Context;
|
||
|
|
import android.os.Build;
|
||
|
|
|
||
|
|
import java.util.ArrayList;
|
||
|
|
import java.util.List;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compatibility processor for InputEvents that allows events to be adjusted before and
|
||
|
|
* after it is sent to the application.
|
||
|
|
*
|
||
|
|
* {@hide}
|
||
|
|
*/
|
||
|
|
public class InputEventCompatProcessor {
|
||
|
|
|
||
|
|
protected Context mContext;
|
||
|
|
protected int mTargetSdkVersion;
|
||
|
|
|
||
|
|
/** List of events to be used to return the processed events */
|
||
|
|
private List<InputEvent> mProcessedEvents;
|
||
|
|
|
||
|
|
public InputEventCompatProcessor(Context context) {
|
||
|
|
mContext = context;
|
||
|
|
mTargetSdkVersion = context.getApplicationInfo().targetSdkVersion;
|
||
|
|
mProcessedEvents = new ArrayList<>();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Processes the InputEvent for compatibility before it is sent to the app, allowing for the
|
||
|
|
* generation of more than one event if necessary.
|
||
|
|
*
|
||
|
|
* @param e The InputEvent to process
|
||
|
|
* @return The list of adjusted events, or null if no adjustments are needed. Do not keep a
|
||
|
|
* reference to the output as the list is reused.
|
||
|
|
*/
|
||
|
|
public List<InputEvent> processInputEventForCompatibility(InputEvent e) {
|
||
|
|
if (mTargetSdkVersion < Build.VERSION_CODES.M && e instanceof MotionEvent) {
|
||
|
|
mProcessedEvents.clear();
|
||
|
|
MotionEvent motion = (MotionEvent) e;
|
||
|
|
final int mask =
|
||
|
|
MotionEvent.BUTTON_STYLUS_PRIMARY | MotionEvent.BUTTON_STYLUS_SECONDARY;
|
||
|
|
final int buttonState = motion.getButtonState();
|
||
|
|
final int compatButtonState = (buttonState & mask) >> 4;
|
||
|
|
if (compatButtonState != 0) {
|
||
|
|
motion.setButtonState(buttonState | compatButtonState);
|
||
|
|
}
|
||
|
|
mProcessedEvents.add(motion);
|
||
|
|
return mProcessedEvents;
|
||
|
|
}
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Processes the InputEvent for compatibility before it is finished by calling
|
||
|
|
* InputEventReceiver#finishInputEvent().
|
||
|
|
*
|
||
|
|
* @param e The InputEvent to process
|
||
|
|
* @return The InputEvent to finish, or null if it should not be finished
|
||
|
|
*/
|
||
|
|
public InputEvent processInputEventBeforeFinish(InputEvent e) {
|
||
|
|
// No changes needed
|
||
|
|
return e;
|
||
|
|
}
|
||
|
|
}
|