/*
* Copyright 2003-2012 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.idea.core.project.stubs;
import com.intellij.psi.*;
import org.jetbrains.annotations.NotNull;
/**
* User: Daniil Elovkov
* Date: 8/30/12
*/
public class JavaStubPsiListener extends PsiTreeChangeAdapter {
@NotNull private PsiTreeChangeListener myDelegate;
public JavaStubPsiListener(@NotNull PsiTreeChangeListener delegate) {
myDelegate = delegate;
}
private boolean interesting(PsiElement elem) {
if (elem instanceof PsiClass || elem instanceof PsiMethod || elem instanceof PsiField
|| elem instanceof PsiParameterList || elem instanceof PsiParameter
|| elem instanceof PsiReferenceList // but not PsiReference !
|| elem instanceof PsiModifierList || elem instanceof PsiModifier
|| elem instanceof PsiTypeParameterList || elem instanceof PsiTypeParameter) {
return true;
}
return false;
}
private boolean notInteresting(PsiElement elem) {
return elem instanceof PsiFile || elem instanceof PsiCodeBlock || elem instanceof PsiExpression;
}
private boolean filter(PsiElement elem) {
if (elem == null || elem instanceof PsiWhiteSpace) return false;
PsiElement e = elem;
do {
if (interesting(e)) return true;
if (notInteresting(e)) return false;
e = e.getParent();
} while (e!=null);
return false;
}
@Override
public void childAdded(PsiTreeChangeEvent e) {
if (filter(e.getChild())) {
myDelegate.childAdded(e);
}
if (e.getChild() instanceof PsiJavaFile) {
// System.out.println("NEW ClASS DEBUG **** " + e.getChild().toString() + " " + e.getParent().toString());
// a file has been added
// myDelegate.childAdded(e);
}
}
@Override
public void childReplaced(PsiTreeChangeEvent e) {
if (filter(e.getNewChild())) {
myDelegate.childReplaced(e);
}
// System.out.println("CAUGHT PSI: " + e.getFile().getName());
// TODO currently only a dumb stub
// will do filtering of psi events
// myDelegate.childReplaced(e);
}
@Override
public void childRemoved(PsiTreeChangeEvent e) {
if (filter(e.getChild())) {
myDelegate.childRemoved(e);
}
}
}