plugins/IntentionPowerPak/src/com/siyeh/ipp/comment/ChangeToEndOfLineCommentIntention.java

/*
 * Copyright 2003-2006 Dave Griffith, Bas Leijdekkers
 *
 * 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.siyeh.ipp.comment;

import com.intellij.openapi.project.Project;
import com.intellij.psi.*;
import com.intellij.psi.codeStyle.CodeStyleManager;
import com.intellij.util.IncorrectOperationException;
import com.siyeh.ipp.base.Intention;
import com.siyeh.ipp.base.PsiElementPredicate;
import org.jetbrains.annotations.NotNull;

public class ChangeToEndOfLineCommentIntention extends Intention {

  @NotNull
  protected PsiElementPredicate getElementPredicate() {
    return new CStyleCommentPredicate();
  }

  public void processIntention(@NotNull PsiElement element)
    throws IncorrectOperationException {
    final PsiComment comment = (PsiComment)element;
    final Project project = comment.getProject();
    final CodeStyleManager codeStyleManager = CodeStyleManager.getInstance(project);
    final PsiElement parent = comment.getParent();
    assert parent != null;
    final PsiElementFactory factory = JavaPsiFacade.getInstance(project).getElementFactory();
    final String commentText = comment.getText();
    final PsiElement whitespace = comment.getNextSibling();
    final String text = commentText.substring(2, commentText.length() - 2);
    final String[] lines = text.split("\n");
    for (int i = lines.length - 1; i >= 1; i--) {
      final PsiComment nextComment =
        factory.createCommentFromText("//" + lines[i].trim(),
                                      parent);
      parent.addAfter(nextComment, comment);
      if (whitespace != null) {
        final PsiParserFacade parserFacade = PsiParserFacade.SERVICE.getInstance(project);
        final PsiElement newWhiteSpace =
          parserFacade.createWhiteSpaceFromText(whitespace.getText());
        parent.addAfter(newWhiteSpace, comment);
      }
    }
    final PsiComment newComment =
      factory.createCommentFromText("//" + lines[0], parent);
    final PsiElement replacedComment = comment.replace(newComment);
    codeStyleManager.reformat(replacedComment);
  }
}