/*
* 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.commands;
import jetbrains.mps.nodeEditor.EditorComponent;
import jetbrains.mps.openapi.editor.commands.CommandContext;
import org.jetbrains.mps.openapi.model.SNode;
import java.util.ArrayList;
import java.util.List;
/**
* User: shatalin
* Date: 09/08/16
*/
public class CommandContextImpl implements CommandContext {
private final EditorComponent myEditorComponent;
private int myCommandLevel = 0;
private List<CommandContextListener> myListeners = new ArrayList<>();
private SNode myContextNode;
private boolean myFireEvents;
public CommandContextImpl(EditorComponent editorComponent) {
myEditorComponent = editorComponent;
}
@Override
public void commandStarted() {
if (myCommandLevel == 0) {
if (myFireEvents = !myEditorComponent.isDisposed()) {
fireTopLevelCommandStarted();
}
}
myCommandLevel++;
}
@Override
public void commandFinished() {
try {
if (myCommandLevel == 1 && myFireEvents) {
fireTopLevelCommandFinished();
}
} finally {
myCommandLevel--;
}
}
public void addListener(CommandContextListener listener) {
myListeners.add(listener);
}
public void removeListener(CommandContextListener listener) {
myListeners.remove(listener);
}
private void fireTopLevelCommandStarted() {
myListeners.forEach(CommandContextListener::topLevelCommandStarted);
}
private void fireTopLevelCommandFinished() {
myListeners.forEach(CommandContextListener::topLevelCommandFinished);
}
@Override
public SNode getContextNode() {
return myContextNode;
}
public void updateContextNode() {
myContextNode = myEditorComponent.getEditedNode() == null ? null : myEditorComponent.getEditedNode().getContainingRoot();
}
}