java/java-impl/src/com/intellij/find/findUsages/ThrowsUsageTargetProvider.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  * @author max
  19  */
  20 package com.intellij.find.findUsages;
  21
  22 import com.intellij.codeInsight.TargetElementUtilBase;
  23 import com.intellij.openapi.editor.Editor;
  24 import com.intellij.psi.PsiElement;
  25 import com.intellij.psi.PsiFile;
  26 import com.intellij.psi.PsiKeyword;
  27 import com.intellij.psi.PsiThrowStatement;
  28 import com.intellij.usages.UsageTarget;
  29 import com.intellij.usages.UsageTargetProvider;
  30 import org.jetbrains.annotations.Nullable;
  31
  32 public class ThrowsUsageTargetProvider implements UsageTargetProvider {
  33   @Nullable
  34   public UsageTarget[] getTargets(Editor editor, final PsiFile file) {
  35     if (editor == null || file == null) return null;
  36
  37     PsiElement element = file.findElementAt(TargetElementUtilBase.adjustOffset(editor.getDocument(), editor.getCaretModel().getOffset()));
  38     if (element == null) return null;
  39
  40     if (element instanceof PsiKeyword && PsiKeyword.THROWS.equals(element.getText())) {
  41       return new UsageTarget[]{new PsiElement2UsageTargetAdapter(element)};
  42     }
  43
  44     final PsiElement parent = element.getParent();
  45     if (parent instanceof PsiThrowStatement) {
  46       return new UsageTarget[] {new PsiElement2UsageTargetAdapter(parent)};
  47     }
  48
  49     return null;
  50   }
  51
  52   public UsageTarget[] getTargets(PsiElement psiElement) {
  53     return null;
  54   }
  55 }