java/java-impl/src/com/intellij/codeInsight/hint/JavaImplementationTextSelectioner.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 /*
  18  * User: anna
  19  * Date: 01-Feb-2008
  20  */
  21 package com.intellij.codeInsight.hint;
  22
  23 import com.intellij.openapi.diagnostic.Logger;
  24 import com.intellij.psi.PsiDocCommentOwner;
  25 import com.intellij.psi.PsiElement;
  26 import com.intellij.psi.PsiWhiteSpace;
  27 import com.intellij.psi.javadoc.PsiDocComment;
  28 import org.jetbrains.annotations.NotNull;
  29
  30 public class JavaImplementationTextSelectioner implements ImplementationTextSelectioner {
  31   private static final Logger LOG = Logger.getInstance("#" + JavaImplementationTextSelectioner.class.getName());
  32
  33   public int getTextStartOffset(@NotNull final PsiElement parent) {
  34       PsiElement element = parent;
  35       if (element instanceof PsiDocCommentOwner) {
  36         PsiDocComment comment = ((PsiDocCommentOwner)element).getDocComment();
  37         if (comment != null) {
  38           element = comment.getNextSibling();
  39           while (element instanceof PsiWhiteSpace) {
  40             element = element.getNextSibling();
  41           }
  42         }
  43       }
  44
  45       if (element != null) {
  46         return element.getTextRange().getStartOffset();
  47       }
  48       else {
  49         LOG.assertTrue(false, "Element should not be null: " + parent.getText());
  50         return parent.getTextRange().getStartOffset();
  51       }
  52     }
  53
  54     public int getTextEndOffset(@NotNull PsiElement element) {
  55       return element.getTextRange().getEndOffset();
  56     }
  57 }