/*
* Copyright 2003-2016 JetBrains s.r.o.
*
* 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 jetbrains.mps.nodeEditor.assist;
import com.intellij.openapi.util.Disposer;
import com.intellij.util.Alarm;
import com.intellij.util.Alarm.ThreadToUse;
import com.intellij.util.AlarmFactory;
/**
* An operation that can be scheduled to run after a "quiet period" elapses. If rescheduled during the quiet period, the previous scheduled runs are cancelled,
* and the period starts again.
*/
public abstract class DelayedRunnable {
private final Runnable myRunnable = new Runnable() {
@Override
public void run() {
runEventually();
}
};
private final Alarm myAlarm;
public DelayedRunnable() {
this(ThreadToUse.SWING_THREAD);
}
public DelayedRunnable(ThreadToUse threadToUse) {
myAlarm = AlarmFactory.getInstance().create(threadToUse);
}
/**
* Called every time {@link #scheduleRun} is called, after any pending runs are cancelled and before a new run is scheduled.
*/
protected void runImmediately() { }
/**
* Called when the quiet period elapses without any calls to {@link #scheduleRun}.
*/
protected abstract void runEventually();
public void scheduleRun(long delay) {
myAlarm.cancelAllRequests();
runImmediately();
myAlarm.addRequest(myRunnable, delay);
}
public void dispose() {
Disposer.dispose(myAlarm);
}
}