java/java-impl/src/com/intellij/vcsUtil/JavaVcsSelectionProvider.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.vcsUtil;
  17
  18 import com.intellij.codeInsight.TargetElementUtilBase;
  19 import com.intellij.openapi.editor.Document;
  20 import com.intellij.openapi.editor.Editor;
  21 import com.intellij.openapi.fileEditor.FileDocumentManager;
  22 import com.intellij.openapi.util.TextRange;
  23 import com.intellij.openapi.vcs.VcsBundle;
  24 import com.intellij.openapi.vcs.actions.VcsContext;
  25 import com.intellij.openapi.vfs.VirtualFile;
  26 import com.intellij.psi.*;
  27 import org.jetbrains.annotations.Nullable;
  28
  29 /**
  30  * @author yole
  31  */
  32 public class JavaVcsSelectionProvider implements VcsSelectionProvider {
  33   @Nullable
  34   public VcsSelection getSelection(final VcsContext context) {
  35     final Editor editor = context.getEditor();
  36     if (editor == null) return null;
  37     PsiElement psiElement = TargetElementUtilBase.findTargetElement(editor, TargetElementUtilBase.ELEMENT_NAME_ACCEPTED);
  38     if (psiElement == null) {
  39       return null;
  40     }
  41     if (!psiElement.isValid()) {
  42       return null;
  43     }
  44     if (psiElement instanceof PsiCompiledElement) {
  45       return null;
  46     }
  47
  48     final String actionName;
  49
  50     if (psiElement instanceof PsiClass) {
  51       actionName = VcsBundle.message("action.name.show.history.for.class");
  52     }
  53     else if (psiElement instanceof PsiField) {
  54       actionName = VcsBundle.message("action.name.show.history.for.field");
  55     }
  56     else if (psiElement instanceof PsiMethod) {
  57       actionName = VcsBundle.message("action.name.show.history.for.method");
  58     }
  59     else if (psiElement instanceof PsiCodeBlock) {
  60       actionName = VcsBundle.message("action.name.show.history.for.code.block");
  61     }
  62     else if (psiElement instanceof PsiStatement) {
  63       actionName = VcsBundle.message("action.name.show.history.for.statement");
  64     }
  65     else {
  66       return null;
  67     }
  68
  69     TextRange textRange = psiElement.getTextRange();
  70     if (textRange == null) {
  71       return null;
  72     }
  73
  74     VirtualFile virtualFile = psiElement.getContainingFile().getVirtualFile();
  75     if (virtualFile == null) {
  76       return null;
  77     }
  78     if (!virtualFile.isValid()) {
  79       return null;
  80     }
  81
  82     Document document = FileDocumentManager.getInstance().getDocument(virtualFile);
  83     return new VcsSelection(document, textRange, actionName);
  84   }
  85 }