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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.openapi.diagnostic.Logger;
import com.intellij.psi.JavaTokenType;
import com.intellij.psi.impl.PsiImplUtil;
import com.intellij.psi.impl.source.tree.*;
import com.intellij.psi.tree.ChildRoleBase;
import com.intellij.psi.tree.IElementType;
import com.intellij.util.CharTable;
import org.jetbrains.annotations.NotNull;
/**
* @author max
*/
public class TypeParameterListElement extends CompositeElement {
private static final Logger LOG = Logger.getInstance("#com.intellij.psi.impl.source.tree.java.TypeParameterListElement");
public TypeParameterListElement() {
super(JavaElementType.TYPE_PARAMETER_LIST);
}
@Override
public int getChildRole(final ASTNode child) {
LOG.assertTrue(child.getTreeParent() == this);
final IElementType elType = child.getElementType();
if (elType == JavaElementType.TYPE_PARAMETER) {
return ChildRole.TYPE_PARAMETER_IN_LIST;
}
else if (elType == JavaTokenType.COMMA) {
return ChildRole.COMMA;
}
else if (elType == JavaTokenType.LT) {
return ChildRole.LT_IN_TYPE_LIST;
}
else if (elType == JavaTokenType.GT) {
return ChildRole.GT_IN_TYPE_LIST;
}
else {
return ChildRoleBase.NONE;
}
}
@Override
public TreeElement addInternal(final TreeElement first, final ASTNode last, ASTNode anchor, Boolean before) {
TreeElement lt = (TreeElement)findChildByRole(ChildRole.LT_IN_TYPE_LIST);
final CharTable treeCharTab = SharedImplUtil.findCharTableByTree(this);
if (lt == null) {
lt = Factory.createSingleLeafElement(JavaTokenType.LT, "<", 0, 1, treeCharTab, getManager());
super.addInternal(lt, lt, getFirstChildNode(), Boolean.TRUE);
}
TreeElement gt = (TreeElement)findChildByRole(ChildRole.GT_IN_TYPE_LIST);
if (gt == null) {
gt = Factory.createSingleLeafElement(JavaTokenType.GT, ">", 0, 1, treeCharTab, getManager());
super.addInternal(gt, gt, getLastChildNode(), Boolean.FALSE);
}
if (anchor == null) {
if (before == null || before.booleanValue()){
anchor = gt;
before = Boolean.TRUE;
}
else{
anchor = lt;
before = Boolean.FALSE;
}
}
final TreeElement firstAdded = super.addInternal(first, last, anchor, before);
if (first == last && first.getElementType() == JavaElementType.TYPE_PARAMETER) {
for(ASTNode child = first.getTreeNext(); child != null; child = child.getTreeNext()){
if (child.getElementType() == JavaTokenType.COMMA) break;
if (child.getElementType() == JavaElementType.TYPE_PARAMETER){
final TreeElement comma = Factory.createSingleLeafElement(JavaTokenType.COMMA, ",", 0, 1, treeCharTab, getManager());
super.addInternal(comma, comma, first, Boolean.FALSE);
break;
}
}
for(ASTNode child = first.getTreePrev(); child != null; child = child.getTreePrev()){
if (child.getElementType() == JavaTokenType.COMMA) break;
if (child.getElementType() == JavaElementType.TYPE_PARAMETER){
final TreeElement comma = Factory.createSingleLeafElement(JavaTokenType.COMMA, ",", 0, 1, treeCharTab, getManager());
super.addInternal(comma, comma, child, Boolean.FALSE);
break;
}
}
}
return firstAdded;
}
@Override
public void deleteChildInternal(@NotNull final ASTNode child) {
if (child.getElementType() == JavaElementType.TYPE_PARAMETER){
final ASTNode next = PsiImplUtil.skipWhitespaceAndComments(child.getTreeNext());
if (next != null && next.getElementType() == JavaTokenType.COMMA){
deleteChildInternal(next);
}
else{
final ASTNode prev = PsiImplUtil.skipWhitespaceAndCommentsBack(child.getTreePrev());
if (prev != null && prev.getElementType() == JavaTokenType.COMMA){
deleteChildInternal(prev);
}
}
}
super.deleteChildInternal(child);
if (child.getElementType() == JavaElementType.TYPE_PARAMETER) {
final ASTNode lt = findChildByRole(ChildRole.LT_IN_TYPE_LIST);
final ASTNode next = PsiImplUtil.skipWhitespaceAndComments(lt.getTreeNext());
if (next != null && next.getElementType() == JavaTokenType.GT) {
deleteChildInternal(lt);
deleteChildInternal(next);
}
}
}
}
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