MissingWhileBodyFixer.java

/*
 * 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.codeInsight.editorActions.smartEnter;

import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.Editor;
import com.intellij.psi.PsiBlockStatement;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiJavaToken;
import com.intellij.psi.PsiWhileStatement;
import com.intellij.util.IncorrectOperationException;

public class MissingWhileBodyFixer implements Fixer {
  @Override
  public void apply(Editor editor, JavaSmartEnterProcessor processor, PsiElement psiElement) throws IncorrectOperationException {
    if (!(psiElement instanceof PsiWhileStatement)) return;
    PsiWhileStatement whileStatement = (PsiWhileStatement) psiElement;

    final Document doc = editor.getDocument();

    PsiElement body = whileStatement.getBody();
    if (body instanceof PsiBlockStatement) return;
    if (body != null && startLine(doc, body) == startLine(doc, whileStatement) && whileStatement.getCondition() != null) return;

    final PsiJavaToken rParenth = whileStatement.getRParenth();
    assert rParenth != null;

    doc.insertString(rParenth.getTextRange().getEndOffset(), "{}");
  }

  private static int startLine(Document doc, PsiElement psiElement) {
    return doc.getLineNumber(psiElement.getTextRange().getStartOffset());
  }
}