java/java-impl/src/com/intellij/psi/util/proximity/SamePsiMemberWeigher.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 package com.intellij.psi.util.proximity;
  17
  18 import com.intellij.psi.PsiClass;
  19 import com.intellij.psi.PsiElement;
  20 import com.intellij.psi.PsiFile;
  21 import com.intellij.psi.PsiMember;
  22 import com.intellij.psi.util.ProximityLocation;
  23 import com.intellij.psi.util.PsiTreeUtil;
  24 import org.jetbrains.annotations.NotNull;
  25
  26 /**
  27  * @author peter
  28 */
  29 public class SamePsiMemberWeigher extends ProximityWeigher {
  30
  31   public Comparable weigh(@NotNull final PsiElement element, final ProximityLocation location) {
  32     PsiElement position = location.getPosition();
  33     if (!position.isPhysical() && element.isPhysical()) {
  34       final PsiFile file = position.getContainingFile();
  35       if (file != null) {
  36         final PsiFile originalFile = file.getOriginalFile();
  37         final int offset = position.getTextRange().getStartOffset();
  38         PsiElement candidate = originalFile.findElementAt(offset);
  39         if (candidate == null) {
  40           candidate = originalFile.findElementAt(offset - 1);
  41         }
  42         if (candidate != null) {
  43           position = candidate;
  44         }
  45       }
  46     }
  47
  48     final PsiMember member = PsiTreeUtil.getContextOfType(PsiTreeUtil.findCommonContext(position, element), PsiMember.class, false);
  49     if (member instanceof PsiClass) return 1;
  50     if (member != null) return 2;
  51     return 0;
  52   }
  53
  54 }