/*
* Copyright 2000-2015 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 com.intellij.formatting.engine;
import com.intellij.util.containers.ContainerUtil;
import java.util.List;
public class StateProcessor {
private final List<State> myStates = ContainerUtil.newArrayList();
private State myCurrentState;
public StateProcessor(State initial) {
myCurrentState = initial;
}
public void setNextState(State state) {
myStates.add(state);
}
public boolean isDone() {
return myStates.isEmpty() && myCurrentState.isDone();
}
public void iteration() {
if (!myCurrentState.isDone()) {
myCurrentState.iteration();
}
shiftStateIfNecessary();
}
private void shiftStateIfNecessary() {
if (myCurrentState.isDone() && !myStates.isEmpty()) {
myCurrentState = myStates.get(0);
myStates.remove(0);
myCurrentState.prepare();
}
}
public void stop() {
myCurrentState.stop();
}
}