/*
* 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.checking;
import jetbrains.mps.nodeEditor.EditorComponent;
import jetbrains.mps.smodel.event.SModelChildEvent;
import jetbrains.mps.smodel.event.SModelEvent;
import jetbrains.mps.smodel.event.SModelPropertyEvent;
import jetbrains.mps.smodel.event.SModelReferenceEvent;
import jetbrains.mps.smodel.event.SModelRootEvent;
import java.util.List;
/**
* A base class for checkers that need to update themselves when a certain model event occurs. Keeps a single internal flag indicating the need to update.
*/
public abstract class BaseEventProcessingEditorChecker extends BaseEditorChecker {
private boolean myNeedsUpdate = true;
@Override
public void processEvents(List<SModelEvent> events) {
if (myNeedsUpdate) {
return;
}
if (needsUpdateAfterEvents(events)) {
myNeedsUpdate = true;
}
}
@Override
public void doneUpdating() {
myNeedsUpdate = false;
}
@Override
public boolean needsUpdate(EditorComponent editorComponent) {
return myNeedsUpdate;
}
protected boolean needsUpdateAfterEvents(List<SModelEvent> events) {
for (SModelEvent event : events) {
if (needsUpdateAfterEvent(event)) {
return true;
}
}
return false;
}
protected boolean needsUpdateAfterEvent(SModelEvent event) {
if (event instanceof SModelRootEvent || event instanceof SModelChildEvent || event instanceof SModelReferenceEvent) {
return true;
}
if (event instanceof SModelPropertyEvent) {
if (needsUpdateAfterPropertyEvent((SModelPropertyEvent) event)) {
return true;
}
}
return false;
}
protected boolean needsUpdateAfterPropertyEvent(SModelPropertyEvent event) {
return false;
}
}