PackageAccessibilityStatementElement.java

/*
 * Copyright 2000-2017 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;

import com.intellij.lang.ASTNode;
import com.intellij.psi.JavaTokenType;
import com.intellij.psi.impl.PsiImplUtil;
import com.intellij.psi.impl.source.tree.CompositeElement;
import com.intellij.psi.impl.source.tree.JavaElementType;
import com.intellij.psi.tree.IElementType;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/**
 * @author Pavel.Dolgov
 */
public class PackageAccessibilityStatementElement extends CompositeElement {
  public PackageAccessibilityStatementElement(@NotNull IElementType type) {
    super(type);
  }

  @Override
  public void deleteChildInternal(@NotNull ASTNode child) {
    if (child.getElementType() == JavaElementType.MODULE_REFERENCE) {
      ASTNode comma = findNearestComma(child);
      if (comma != null) {
        super.deleteChildInternal(comma);
      }
      else {
        ASTNode toKeyword = findChildByType(JavaTokenType.TO_KEYWORD);
        if (toKeyword != null) {
          super.deleteChildInternal(toKeyword);
        }
      }
    }
    super.deleteChildInternal(child);
  }

  @Nullable
  private static ASTNode findNearestComma(@NotNull ASTNode child) {
    ASTNode next = PsiImplUtil.skipWhitespaceAndComments(child.getTreeNext());
    if (next != null && next.getElementType() == JavaTokenType.COMMA) {
      return next;
    }
    else {
      ASTNode prev = PsiImplUtil.skipWhitespaceAndCommentsBack(child.getTreePrev());
      if (prev != null && prev.getElementType() == JavaTokenType.COMMA) {
        return prev;
      }
    }
    return null;
  }
}