1 files changed, 35 insertions, 0 deletions
diff --git a/dom/xslt/xpath/txRootExpr.cpp b/dom/xslt/xpath/txRootExpr.cpp
new file mode 100644
index 0000000000..cabc0e1c13
--- /dev/null
+++ b/dom/xslt/xpath/txRootExpr.cpp
@@ -0,0 +1,35 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "txExpr.h"
+#include "txNodeSet.h"
+#include "txIXPathContext.h"
+#include "txXPathTreeWalker.h"
+
+/**
+ * Evaluates this Expr based on the given context node and processor state
+ * @param context the context node for evaluation of this Expr
+ * @param ps the ContextState containing the stack information needed
+ * for evaluation
+ * @return the result of the evaluation
+ **/
+nsresult RootExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult) {
+  txXPathTreeWalker walker(aContext->getContextNode());
+  walker.moveToRoot();
+
+  return aContext->recycler()->getNodeSet(walker.getCurrentPosition(), aResult);
+}
+
+TX_IMPL_EXPR_STUBS_0(RootExpr, NODESET_RESULT)
+
+bool RootExpr::isSensitiveTo(ContextSensitivity aContext) {
+  return !!(aContext & NODE_CONTEXT);
+}
+
+#ifdef TX_TO_STRING
+void RootExpr::toString(nsAString& dest) {
+  if (mSerialize) dest.Append(char16_t('/'));
+}
+#endif