platform/lang-impl/src/com/intellij/usageView/UsageViewTypeLocation.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.usageView;
  18
  19 import com.intellij.psi.*;
  20 import com.intellij.psi.meta.PsiMetaData;
  21 import com.intellij.psi.meta.PsiMetaOwner;
  22 import com.intellij.psi.meta.PsiPresentableMetaData;
  23 import com.intellij.lang.LangBundle;
  24 import com.intellij.lang.Language;
  25 import com.intellij.lang.findUsages.FindUsagesProvider;
  26 import com.intellij.lang.findUsages.LanguageFindUsages;
  27 import com.intellij.openapi.util.text.StringUtil;
  28 import com.intellij.util.xml.TypeNameManager;
  29 import org.jetbrains.annotations.NotNull;
  30
  31 /**
  32  * @author peter
  33  */
  34 public class UsageViewTypeLocation extends ElementDescriptionLocation {
  35   private UsageViewTypeLocation() {
  36   }
  37
  38   public static final UsageViewTypeLocation INSTANCE = new UsageViewTypeLocation();
  39
  40   public ElementDescriptionProvider getDefaultProvider() {
  41     return DEFAULT_PROVIDER;
  42   }
  43
  44   private static final ElementDescriptionProvider DEFAULT_PROVIDER = new ElementDescriptionProvider() {
  45     public String getElementDescription(@NotNull final PsiElement psiElement, @NotNull final ElementDescriptionLocation location) {
  46       if (!(location instanceof UsageViewTypeLocation)) return null;
  47
  48       if (psiElement instanceof PsiMetaOwner) {
  49         final PsiMetaData metaData = ((PsiMetaOwner)psiElement).getMetaData();
  50         if (metaData instanceof PsiPresentableMetaData) {
  51           return ((PsiPresentableMetaData)metaData).getTypeName();
  52         }
  53       }
  54
  55       if (psiElement instanceof PsiFile) {
  56         return LangBundle.message("terms.file");
  57       }
  58       if (psiElement instanceof PsiDirectory) {
  59         return LangBundle.message("terms.directory");
  60       }
  61
  62       final Language lang = psiElement.getLanguage();
  63       FindUsagesProvider provider = LanguageFindUsages.INSTANCE.forLanguage(lang);
  64       final String type = provider.getType(psiElement);
  65       if (StringUtil.isNotEmpty(type)) {
  66         return type;
  67       }
  68
  69       return TypeNameManager.getTypeName(psiElement.getClass());
  70     }
  71   };
  72 }