1 files changed, 69 insertions, 0 deletions
diff --git a/dom/xslt/xpath/txVariableRefExpr.cpp b/dom/xslt/xpath/txVariableRefExpr.cpp
new file mode 100644
index 000000000..813e17b8f
--- /dev/null
+++ b/dom/xslt/xpath/txVariableRefExpr.cpp
@@ -0,0 +1,69 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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 "nsIAtom.h"
+#include "txNodeSet.h"
+#include "nsGkAtoms.h"
+#include "txIXPathContext.h"
+
+  //-------------------/
+ //- VariableRefExpr -/
+//-------------------/
+
+/**
+ * Creates a VariableRefExpr with the given variable name
+**/
+VariableRefExpr::VariableRefExpr(nsIAtom* aPrefix, nsIAtom* aLocalName,
+                                 int32_t aNSID)
+    : mPrefix(aPrefix), mLocalName(aLocalName), mNamespace(aNSID)
+{
+    NS_ASSERTION(mLocalName, "VariableRefExpr without local name?");
+    if (mPrefix == nsGkAtoms::_empty)
+        mPrefix = nullptr;
+}
+
+/**
+ * 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
+VariableRefExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
+{
+    nsresult rv = aContext->getVariable(mNamespace, mLocalName, *aResult);
+    if (NS_FAILED(rv)) {
+      // XXX report error, undefined variable
+      return rv;
+    }
+    return NS_OK;
+}
+
+TX_IMPL_EXPR_STUBS_0(VariableRefExpr, ANY_RESULT)
+
+bool
+VariableRefExpr::isSensitiveTo(ContextSensitivity aContext)
+{
+    return !!(aContext & VARIABLES_CONTEXT);
+}
+
+#ifdef TX_TO_STRING
+void
+VariableRefExpr::toString(nsAString& aDest)
+{
+    aDest.Append(char16_t('$'));
+    if (mPrefix) {
+        nsAutoString prefix;
+        mPrefix->ToString(prefix);
+        aDest.Append(prefix);
+        aDest.Append(char16_t(':'));
+    }
+    nsAutoString lname;
+    mLocalName->ToString(lname);
+    aDest.Append(lname);
+}
+#endif