/*
* 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.codeStyle.CodeStyleManager;
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.ChildRoleBase;
import com.intellij.psi.tree.IElementType;
import com.intellij.util.CharTable;
import com.intellij.util.IncorrectOperationException;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
public class ParameterListElement extends CompositeElement implements Constants {
private static final Logger LOG = Logger.getInstance("#com.intellij.psi.impl.source.tree.java.ParameterListElement");
public ParameterListElement() {
super(PARAMETER_LIST);
}
@Override
public TreeElement addInternal(TreeElement first, ASTNode last, ASTNode anchor, Boolean before) {
if (anchor == null) {
if (before == null || before.booleanValue()) {
anchor = findChildByRole(ChildRole.RPARENTH);
before = Boolean.TRUE;
}
else {
anchor = findChildByRole(ChildRole.LPARENTH);
before = Boolean.FALSE;
}
}
TreeElement firstAdded = super.addInternal(first, last, anchor, before);
if (first == last && first.getElementType() == PARAMETER) {
final CharTable treeCharTab = SharedImplUtil.findCharTableByTree(this);
for (ASTNode child = ((ASTNode)first).getTreeNext(); child != null; child = child.getTreeNext()) {
if (child.getElementType() == COMMA) break;
if (child.getElementType() == PARAMETER) {
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 (child.getElementType() == PARAMETER) {
TreeElement comma = Factory.createSingleLeafElement(COMMA, ",", 0, 1, treeCharTab, getManager());
super.addInternal(comma, comma, child, Boolean.FALSE);
break;
}
}
}
//todo[max] hack?
try {
CodeStyleManager.getInstance(getManager().getProject()).reformat(getPsi());
}
catch (IncorrectOperationException e) {
LOG.error(e);
}
return firstAdded;
}
@Override
public void deleteChildInternal(@NotNull ASTNode child) {
final TreeElement oldLastNodeInsideParens = getLastNodeInsideParens();
final TreeElement oldFirstNodeInsideParens = getFirstNodeInsideParens();
if (child.getElementType() == PARAMETER) {
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);
// We may want to fix trailing white space processing here - there is a following possible case:
// *) this parameter list is like (arg1, <white-space-containing-line-breaks>, arg2);
// *) 'arg2' is to be removed;
// We don't want to keep trailing white space then
TreeElement newLastNodeInsideParens = getLastNodeInsideParens();
if (newLastNodeInsideParens != null && newLastNodeInsideParens.getElementType() == WHITE_SPACE) {
if (oldLastNodeInsideParens.getElementType() != WHITE_SPACE) {
deleteChildInternal(newLastNodeInsideParens);
} else {
replaceChild(newLastNodeInsideParens, (ASTNode)oldLastNodeInsideParens.clone());
}
}
final TreeElement newFirstNodeInsideParens = getFirstNodeInsideParens();
if (newFirstNodeInsideParens != null && newFirstNodeInsideParens.getElementType() == WHITE_SPACE) {
if (oldFirstNodeInsideParens == null || oldFirstNodeInsideParens.getElementType() != WHITE_SPACE) {
deleteChildInternal(newFirstNodeInsideParens);
} else {
replaceChild(newFirstNodeInsideParens, (ASTNode)oldFirstNodeInsideParens.clone());
}
}
//todo[max] hack?
try {
CodeStyleManager.getInstance(getManager().getProject()).reformat(getPsi());
}
catch (IncorrectOperationException e) {
LOG.error(e);
}
}
@Override
public ASTNode findChildByRole(int role) {
LOG.assertTrue(ChildRole.isUnique(role));
switch (role) {
default:
return null;
case ChildRole.LPARENTH:
if (getFirstChildNode().getElementType() == LPARENTH) {
return getFirstChildNode();
}
else {
return null;
}
case ChildRole.RPARENTH:
if (getLastChildNode().getElementType() == RPARENTH) {
return getLastChildNode();
}
else {
return null;
}
}
}
@Override
public int getChildRole(ASTNode child) {
LOG.assertTrue(child.getTreeParent() == this);
IElementType i = child.getElementType();
if (i == PARAMETER) {
return ChildRole.PARAMETER;
}
else if (i == COMMA) {
return ChildRole.COMMA;
}
else if (i == LPARENTH) {
return getChildRole(child, ChildRole.LPARENTH);
}
else if (i == RPARENTH) {
return getChildRole(child, ChildRole.RPARENTH);
}
else {
return ChildRoleBase.NONE;
}
}
/**
* @return last node before closing right paren if possible; <code>null</code> otherwise
*/
@Nullable
private TreeElement getLastNodeInsideParens() {
TreeElement lastNode = getLastChildNode();
return lastNode.getElementType() == RPARENTH ? lastNode.getTreePrev() : null;
}
/**
* @return first node after opening left paren if possible; <code>null</code> otherwise
*/
@Nullable
private TreeElement getFirstNodeInsideParens() {
TreeElement firstNode = getFirstChildNode();
return firstNode.getElementType() == LPARENTH ? firstNode.getTreeNext() : null;
}
}