platform/lang-impl/src/com/intellij/refactoring/util/DefaultNonCodeSearchElementDescriptionProvider.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 package com.intellij.refactoring.util;
  18
  19 import com.intellij.psi.*;
  20 import com.intellij.psi.impl.file.PsiDirectoryFactory;
  21 import com.intellij.psi.meta.PsiMetaOwner;
  22 import com.intellij.psi.meta.PsiMetaData;
  23 import com.intellij.openapi.diagnostic.Logger;
  24 import org.jetbrains.annotations.Nullable;
  25 import org.jetbrains.annotations.NotNull;
  26
  27 /**
  28  * @author yole
  29  */
  30 public class DefaultNonCodeSearchElementDescriptionProvider implements ElementDescriptionProvider {
  31   private static final Logger LOG = Logger.getInstance("#com.intellij.refactoring.util.DefaultNonCodeSearchElementDescriptionProvider");
  32
  33   public static final DefaultNonCodeSearchElementDescriptionProvider INSTANCE = new DefaultNonCodeSearchElementDescriptionProvider();
  34
  35   public String getElementDescription(@NotNull final PsiElement element, @NotNull final ElementDescriptionLocation location) {
  36     if (!(location instanceof NonCodeSearchDescriptionLocation)) return null;
  37     final NonCodeSearchDescriptionLocation ncdLocation = (NonCodeSearchDescriptionLocation)location;
  38
  39     if (element instanceof PsiDirectory) {
  40       if (ncdLocation.isNonJava()) {
  41         final String qName = PsiDirectoryFactory.getInstance(element.getProject()).getQualifiedName((PsiDirectory)element, false);
  42         if (qName.length() > 0) return qName;
  43         return null;
  44       }
  45       return ((PsiDirectory) element).getName();
  46     }
  47
  48     if (ncdLocation.isNonJava()) return null;
  49     if (element instanceof PsiMetaOwner) {
  50       final PsiMetaOwner psiMetaOwner = (PsiMetaOwner)element;
  51       final PsiMetaData metaData = psiMetaOwner.getMetaData();
  52       if (metaData != null) {
  53         return metaData.getName();
  54       }
  55     }
  56     if (element instanceof PsiNamedElement) {
  57       return ((PsiNamedElement)element).getName();
  58     }
  59     else {
  60       LOG.error("Unknown element type: " + element);
  61       return null;
  62     }
  63   }
  64 }