| /* |
| * Copyright 2003-2009 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.util.text.StringUtil; |
| import com.intellij.psi.*; |
| import com.intellij.psi.tree.IElementType; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.intellij.util.IncorrectOperationException; |
| import com.siyeh.ipp.base.Intention; |
| import com.siyeh.ipp.base.PsiElementPredicate; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public class ChangeToCStyleCommentIntention extends Intention { |
| |
| private static final Class<PsiWhiteSpace>[] WHITESPACE_CLASS = |
| new Class[]{PsiWhiteSpace.class}; |
| |
| @Override |
| @NotNull |
| protected PsiElementPredicate getElementPredicate() { |
| return new EndOfLineCommentPredicate(); |
| } |
| |
| @Override |
| public void processIntention(PsiElement element) |
| throws IncorrectOperationException { |
| PsiComment firstComment = (PsiComment)element; |
| while (true) { |
| final PsiElement prevComment = |
| PsiTreeUtil.skipSiblingsBackward(firstComment, |
| WHITESPACE_CLASS); |
| if (!isEndOfLineComment(prevComment)) { |
| break; |
| } |
| assert prevComment != null; |
| firstComment = (PsiComment)prevComment; |
| } |
| final JavaPsiFacade psiFacade = |
| JavaPsiFacade.getInstance(element.getProject()); |
| final PsiElementFactory factory = psiFacade.getElementFactory(); |
| final List<PsiComment> multiLineComments = new ArrayList<PsiComment>(); |
| PsiElement nextComment = firstComment; |
| String whiteSpace = null; |
| while (true) { |
| nextComment = PsiTreeUtil.skipSiblingsForward(nextComment, |
| WHITESPACE_CLASS); |
| if (!isEndOfLineComment(nextComment)) { |
| break; |
| } |
| assert nextComment != null; |
| if (whiteSpace == null) { |
| final PsiElement prevSibling = nextComment.getPrevSibling(); |
| assert prevSibling != null; |
| final String text = prevSibling.getText(); |
| whiteSpace = getIndent(text); |
| } |
| multiLineComments.add((PsiComment)nextComment); |
| } |
| final String newCommentString; |
| if (multiLineComments.isEmpty()) { |
| final String text = getCommentContents(firstComment); |
| newCommentString = "/* " + text + " */"; |
| } |
| else { |
| final StringBuilder text = new StringBuilder(); |
| text.append("/*\n"); |
| text.append(whiteSpace); |
| text.append(getCommentContents(firstComment)); |
| for (PsiComment multiLineComment : multiLineComments) { |
| text.append('\n'); |
| text.append(whiteSpace); |
| text.append(getCommentContents(multiLineComment)); |
| } |
| text.append('\n'); |
| text.append(whiteSpace); |
| text.append("*/"); |
| newCommentString = text.toString(); |
| } |
| final PsiComment newComment = |
| factory.createCommentFromText(newCommentString, element); |
| firstComment.replace(newComment); |
| for (PsiElement commentToDelete : multiLineComments) { |
| commentToDelete.delete(); |
| } |
| } |
| |
| private static String getIndent(String whitespace) { |
| for (int i = whitespace.length() - 1; i >= 0; i--) { |
| final char c = whitespace.charAt(i); |
| if (c == '\n') { |
| if (i == whitespace.length() - 1) { |
| return ""; |
| } |
| return whitespace.substring(i + 1); |
| } |
| } |
| return whitespace; |
| } |
| |
| private static boolean isEndOfLineComment(PsiElement element) { |
| if (!(element instanceof PsiComment)) { |
| return false; |
| } |
| final PsiComment comment = (PsiComment)element; |
| final IElementType tokenType = comment.getTokenType(); |
| return JavaTokenType.END_OF_LINE_COMMENT.equals(tokenType); |
| } |
| |
| private static String getCommentContents(@NotNull PsiComment comment) { |
| final String text = comment.getText(); |
| return StringUtil.replace(text.substring(2), "*/", "* /").trim(); |
| } |
| } |