VcsSelection (@NotNull DataContext context) { final Editor editor = context.getData(CommonDataKeys.EDITOR); if (editor == null) return null; PsiElement psiElement = TargetElementUtil.findTargetElement(editor, TargetElementUtil.ELEMENT_NAME_ACCEPTED); if (psiElement == null || !psiElement.isValid()) { return null; } final String actionName; if (psiElement instanceof XmlTag) { actionName = XmlBundle.message("action.name.show.history.for.tag"); } else if (psiElement instanceof XmlText) { actionName = XmlBundle.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); if (document == null) { return null; } return new VcsSelection(document, textRange, actionName); }