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/*
* Copyright 2000-2009 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.psi.impl.source.tree.java;
import com.intellij.lang.ASTNode;
import com.intellij.psi.impl.PsiImplUtil;
import com.intellij.psi.impl.source.Constants;
import com.intellij.psi.impl.source.tree.*;
import com.intellij.psi.tree.IElementType;
import com.intellij.psi.tree.TokenSet;
import com.intellij.util.CharTable;
import org.jetbrains.annotations.NotNull;
/**
* Adds or removes comma
*
* @author ven
*/
public abstract class PsiCommaSeparatedListImpl extends CompositePsiElement implements Constants {
private final TokenSet myTypesOfElements;
protected PsiCommaSeparatedListImpl(IElementType type, final TokenSet typeOfElements) {
super(type);
myTypesOfElements = typeOfElements;
}
@Override
public TreeElement addInternal(TreeElement first, ASTNode last, ASTNode anchor, Boolean before) {
if (myTypesOfElements.contains(first.getElementType()) && myTypesOfElements.contains(last.getElementType())) {
final CharTable treeCharTab = SharedImplUtil.findCharTableByTree(this);
final TreeElement firstAdded = super.addInternal(first, last, anchor, before);
for (ASTNode child = ((ASTNode)first).getTreeNext(); child != null; child = child.getTreeNext()) {
if (child.getElementType() == COMMA) break;
if (myTypesOfElements.contains(child.getElementType())) {
TreeElement comma = Factory.createSingleLeafElement(COMMA, ",", 0, 1, treeCharTab, getManager());
super.addInternal(comma, comma, first, Boolean.FALSE);
break;
}
}
for (ASTNode child = ((ASTNode)first).getTreePrev(); child != null; child = child.getTreePrev()) {
if (child.getElementType() == COMMA) break;
if (myTypesOfElements.contains(child.getElementType())) {
TreeElement comma = Factory.createSingleLeafElement(COMMA, ",", 0, 1, treeCharTab, getManager());
super.addInternal(comma, comma, child, Boolean.FALSE);
break;
}
}
return firstAdded;
}
return super.addInternal(first, last, anchor, before);
}
@Override
public void deleteChildInternal(@NotNull ASTNode child) {
if (myTypesOfElements.contains(child.getElementType())) {
ASTNode next = PsiImplUtil.skipWhitespaceAndComments(child.getTreeNext());
if (next != null && next.getElementType() == COMMA) {
deleteChildInternal(next);
}
else {
ASTNode prev = PsiImplUtil.skipWhitespaceAndCommentsBack(child.getTreePrev());
if (prev != null && prev.getElementType() == COMMA) {
deleteChildInternal(prev);
}
}
}
super.deleteChildInternal(child);
}
}
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