xml/impl/src/com/intellij/vcsUtil/XmlVcsSelectionProvider.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.PsiElement;
  27 import com.intellij.psi.xml.XmlTag;
  28 import com.intellij.psi.xml.XmlText;
  29
  30 /**
  31  * @author yole
  32  */
  33 public class XmlVcsSelectionProvider implements VcsSelectionProvider {
  34   public VcsSelection getSelection(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 || !psiElement.isValid()) {
  39         return null;
  40       }
  41
  42       final String actionName;
  43
  44       if (psiElement instanceof XmlTag) {
  45         actionName = VcsBundle.message("action.name.show.history.for.tag");
  46       }
  47       else if (psiElement instanceof XmlText) {
  48         actionName = VcsBundle.message("action.name.show.history.for.text");
  49       }
  50       else {
  51         return null;
  52       }
  53
  54       TextRange textRange = psiElement.getTextRange();
  55       if (textRange == null) {
  56         return null;
  57       }
  58
  59       VirtualFile virtualFile = psiElement.getContainingFile().getVirtualFile();
  60       if (virtualFile == null) {
  61         return null;
  62       }
  63       if (!virtualFile.isValid()) {
  64         return null;
  65       }
  66
  67       Document document = FileDocumentManager.getInstance().getDocument(virtualFile);
  68       return new VcsSelection(document, textRange, actionName);
  69   }
  70 }