1 files changed, 28 insertions, 0 deletions
diff --git a/dom/base/nsAttrValueOrString.cpp b/dom/base/nsAttrValueOrString.cpp
new file mode 100644
index 0000000000..ecfa894dd2
--- /dev/null
+++ b/dom/base/nsAttrValueOrString.cpp
@@ -0,0 +1,28 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "nsAttrValueOrString.h"
+
+const nsAString& nsAttrValueOrString::String() const {
+  if (mStringPtr) {
+    return *mStringPtr;
+  }
+
+  if (!mAttrValue) {
+    mStringPtr = &mCheapString;
+    return *mStringPtr;
+  }
+
+  if (mAttrValue->Type() == nsAttrValue::eString) {
+    mCheapString = mAttrValue->GetStringValue();
+    mStringPtr = &mCheapString;
+    return *mStringPtr;
+  }
+
+  mAttrValue->ToString(mCheapString);
+  mStringPtr = &mCheapString;
+  return *mStringPtr;
+}