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/*
* Copyright (C) 2012 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 com.android.inputmethod.research;
import android.os.Handler;
import android.os.Message;
import android.os.SystemClock;
import android.util.Log;
import android.view.MotionEvent;
import com.android.inputmethod.keyboard.KeyboardSwitcher;
import com.android.inputmethod.keyboard.MainKeyboardView;
import com.android.inputmethod.latin.define.ProductionFlag;
import com.android.inputmethod.research.MotionEventReader.ReplayData;
/**
* Replays a sequence of motion events in realtime on the screen.
*
* Useful for user inspection of logged data.
*/
public class Replayer {
private static final String TAG = Replayer.class.getSimpleName();
private static final boolean DEBUG = false && ProductionFlag.IS_EXPERIMENTAL_DEBUG;
private static final long START_TIME_DELAY_MS = 500;
private boolean mIsReplaying = false;
private KeyboardSwitcher mKeyboardSwitcher;
public void setKeyboardSwitcher(final KeyboardSwitcher keyboardSwitcher) {
mKeyboardSwitcher = keyboardSwitcher;
}
private static final int MSG_MOTION_EVENT = 0;
private static final int MSG_DONE = 1;
private static final int COMPLETION_TIME_MS = 500;
// TODO: Support historical events and multi-touch.
public void replay(final ReplayData replayData) {
if (mIsReplaying) {
return;
}
mIsReplaying = true;
final int numActions = replayData.mActions.size();
if (DEBUG) {
Log.d(TAG, "replaying " + numActions + " actions");
}
if (numActions == 0) {
mIsReplaying = false;
return;
}
final MainKeyboardView mainKeyboardView = mKeyboardSwitcher.getMainKeyboardView();
// The reference time relative to the times stored in events.
final long origStartTime = replayData.mTimes.get(0);
// The reference time relative to which events are replayed in the present.
final long currentStartTime = SystemClock.uptimeMillis() + START_TIME_DELAY_MS;
// The adjustment needed to translate times from the original recorded time to the current
// time.
final long timeAdjustment = currentStartTime - origStartTime;
final Handler handler = new Handler() {
// Track the time of the most recent DOWN event, to be passed as a parameter when
// constructing a MotionEvent. It's initialized here to the origStartTime, but this is
// only a precaution. The value should be overwritten by the first ACTION_DOWN event
// before the first use of the variable. Note that this may cause the first few events
// to have incorrect {@code downTime}s.
private long mOrigDownTime = origStartTime;
@Override
public void handleMessage(final Message msg) {
switch (msg.what) {
case MSG_MOTION_EVENT:
final int index = msg.arg1;
final int action = replayData.mActions.get(index);
final int x = replayData.mXCoords.get(index);
final int y = replayData.mYCoords.get(index);
final long origTime = replayData.mTimes.get(index);
if (action == MotionEvent.ACTION_DOWN) {
mOrigDownTime = origTime;
}
final MotionEvent me = MotionEvent.obtain(mOrigDownTime + timeAdjustment,
origTime + timeAdjustment, action, x, y, 0);
mainKeyboardView.processMotionEvent(me);
me.recycle();
break;
case MSG_DONE:
mIsReplaying = false;
break;
}
}
};
for (int i = 0; i < numActions; i++) {
final Message msg = Message.obtain(handler, MSG_MOTION_EVENT, i, 0);
final long msgTime = replayData.mTimes.get(i) + timeAdjustment;
handler.sendMessageAtTime(msg, msgTime);
if (DEBUG) {
Log.d(TAG, "queuing event at " + msgTime);
}
}
final long presentDoneTime = replayData.mTimes.get(numActions - 1) + timeAdjustment
+ COMPLETION_TIME_MS;
handler.sendMessageAtTime(Message.obtain(handler, MSG_DONE), presentDoneTime);
}
}
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