diff -r 000000000000 -r 6474c204b198 dom/xslt/xpath/nsXPathResult.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/xslt/xpath/nsXPathResult.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,113 @@
+/* -*- 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/. */
+
+#ifndef nsXPathResult_h__
+#define nsXPathResult_h__
+
+#include "txExprResult.h"
+#include "nsIDOMXPathResult.h"
+#include "nsStubMutationObserver.h"
+#include "nsCOMPtr.h"
+#include "nsCOMArray.h"
+#include "nsWeakPtr.h"
+#include "nsCycleCollectionParticipant.h"
+#include "mozilla/Attributes.h"
+
+class nsIDocument;
+
+// {662f2c9a-c7cd-4cab-9349-e733df5a838c}
+#define NS_IXPATHRESULT_IID \
+{ 0x662f2c9a, 0xc7cd, 0x4cab, {0x93, 0x49, 0xe7, 0x33, 0xdf, 0x5a, 0x83, 0x8c }}
+
+class nsIXPathResult : public nsISupports
+{
+public:
+    NS_DECLARE_STATIC_IID_ACCESSOR(NS_IXPATHRESULT_IID)
+    virtual nsresult SetExprResult(txAExprResult *aExprResult,
+                                   uint16_t aResultType,
+                                   nsINode* aContextNode) = 0;
+    virtual nsresult GetExprResult(txAExprResult **aExprResult) = 0;
+    virtual nsresult Clone(nsIXPathResult **aResult) = 0;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(nsIXPathResult, NS_IXPATHRESULT_IID)
+
+/**
+ * A class for evaluating an XPath expression string
+ */
+class nsXPathResult MOZ_FINAL : public nsIDOMXPathResult,
+                                public nsStubMutationObserver,
+                                public nsIXPathResult
+{
+public:
+    nsXPathResult();
+    nsXPathResult(const nsXPathResult &aResult);
+    ~nsXPathResult();
+
+    // nsISupports interface
+    NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+    NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsXPathResult, nsIDOMXPathResult)
+
+    // nsIDOMXPathResult interface
+    NS_DECL_NSIDOMXPATHRESULT
+
+    // nsIMutationObserver interface
+    NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED
+    NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
+    NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
+    NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
+    NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
+    NS_DECL_NSIMUTATIONOBSERVER_NODEWILLBEDESTROYED
+
+    // nsIXPathResult interface
+    nsresult SetExprResult(txAExprResult *aExprResult, uint16_t aResultType,
+                           nsINode* aContextNode) MOZ_OVERRIDE;
+    nsresult GetExprResult(txAExprResult **aExprResult) MOZ_OVERRIDE;
+    nsresult Clone(nsIXPathResult **aResult) MOZ_OVERRIDE;
+    void RemoveObserver();
+private:
+    static bool isSnapshot(uint16_t aResultType)
+    {
+        return aResultType == UNORDERED_NODE_SNAPSHOT_TYPE ||
+               aResultType == ORDERED_NODE_SNAPSHOT_TYPE;
+    }
+    static bool isIterator(uint16_t aResultType)
+    {
+        return aResultType == UNORDERED_NODE_ITERATOR_TYPE ||
+               aResultType == ORDERED_NODE_ITERATOR_TYPE;
+    }
+    static bool isNode(uint16_t aResultType)
+    {
+        return aResultType == FIRST_ORDERED_NODE_TYPE ||
+               aResultType == ANY_UNORDERED_NODE_TYPE;
+    }
+    bool isSnapshot() const
+    {
+        return isSnapshot(mResultType);
+    }
+    bool isIterator() const
+    {
+        return isIterator(mResultType);
+    }
+    bool isNode() const
+    {
+        return isNode(mResultType);
+    }
+
+    void Invalidate(const nsIContent* aChangeRoot);
+
+    nsRefPtr<txAExprResult> mResult;
+    nsCOMArray<nsIDOMNode> mResultNodes;
+    nsCOMPtr<nsIDocument> mDocument;
+    uint32_t mCurrentPos;
+    uint16_t mResultType;
+    nsWeakPtr mContextNode;
+    bool mInvalidIteratorState;
+    bool mBooleanResult;
+    double mNumberResult;
+    nsString mStringResult;
+};
+
+#endif