split PsiVcsSelectionProvider into java and xml parts

java/java-impl/src/com/intellij/vcsUtil/JavaVcsSelectionProvider.java

@@ -9,14 +9,12 @@ import com.intellij.openapi.vcs.VcsBundle;
 import com.intellij.openapi.vcs.actions.VcsContext;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.*;
-import com.intellij.psi.xml.XmlTag;
-import com.intellij.psi.xml.XmlText;
 import org.jetbrains.annotations.Nullable;
 
 /**
  * @author yole
  */
-public class PsiVcsSelectionProvider implements VcsSelectionProvider {
+public class JavaVcsSelectionProvider implements VcsSelectionProvider {
   @Nullable
   public VcsSelection getSelection(final VcsContext context) {
     final Editor editor = context.getEditor();
@@ -43,12 +41,6 @@ public class PsiVcsSelectionProvider implements VcsSelectionProvider {
     else if (psiElement instanceof PsiMethod) {
       actionName = VcsBundle.message("action.name.show.history.for.method");
     }
-    else if (psiElement instanceof XmlTag) {
-      actionName = VcsBundle.message("action.name.show.history.for.tag");
-    }
-    else if (psiElement instanceof XmlText) {
-      actionName = VcsBundle.message("action.name.show.history.for.text");
-    }
     else if (psiElement instanceof PsiCodeBlock) {
       actionName = VcsBundle.message("action.name.show.history.for.code.block");
     }

platform/platform-resources/src/META-INF/XmlPlugin.xml

@@ -282,6 +282,8 @@
     <todoIndexer filetype="XHTML" implementationClass="com.intellij.psi.impl.cache.impl.idCache.XHtmlTodoIndexer"/>
 
     <elementSignatureProvider implementation="com.intellij.codeInsight.folding.impl.XmlElementSignatureProvider"/>
+
+    <vcsSelectionProvider implementation="com.intellij.vcsUtil.XmlVcsSelectionProvider"/>
   </extensions>
 
   <actions>

xml/impl/src/com/intellij/vcsUtil/XmlVcsSelectionProvider.java

@@ -0,0 +1,55 @@
+package com.intellij.vcsUtil;
+
+import com.intellij.codeInsight.TargetElementUtilBase;
+import com.intellij.openapi.editor.Document;
+import com.intellij.openapi.editor.Editor;
+import com.intellij.openapi.fileEditor.FileDocumentManager;
+import com.intellij.openapi.util.TextRange;
+import com.intellij.openapi.vcs.VcsBundle;
+import com.intellij.openapi.vcs.actions.VcsContext;
+import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.xml.XmlTag;
+import com.intellij.psi.xml.XmlText;
+
+/**
+ * @author yole
+ */
+public class XmlVcsSelectionProvider implements VcsSelectionProvider {
+  public VcsSelection getSelection(VcsContext context) {
+    final Editor editor = context.getEditor();
+      if (editor == null) return null;
+      PsiElement psiElement = TargetElementUtilBase.findTargetElement(editor, TargetElementUtilBase.ELEMENT_NAME_ACCEPTED);
+      if (psiElement == null || !psiElement.isValid()) {
+        return null;
+      }
+
+      final String actionName;
+
+      if (psiElement instanceof XmlTag) {
+        actionName = VcsBundle.message("action.name.show.history.for.tag");
+      }
+      else if (psiElement instanceof XmlText) {
+        actionName = VcsBundle.message("action.name.show.history.for.text");
+      }
+      else {
+        return null;
+      }
+
+      TextRange textRange = psiElement.getTextRange();
+      if (textRange == null) {
+        return null;
+      }
+
+      VirtualFile virtualFile = psiElement.getContainingFile().getVirtualFile();
+      if (virtualFile == null) {
+        return null;
+      }
+      if (!virtualFile.isValid()) {
+        return null;
+      }
+
+      Document document = FileDocumentManager.getInstance().getDocument(virtualFile);
+      return new VcsSelection(document, textRange, actionName);
+  }
+}

xml/impl/xml.iml

@@ -16,6 +16,7 @@
     <orderEntry type="module" module-name="icons" />
     <orderEntry type="library" name="XmlBeans" level="project" />
     <orderEntry type="module" module-name="platform-resources" />
+    <orderEntry type="module" module-name="vcs-api" />
   </component>
   <component name="copyright">
     <Base>