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-rw-r--r--dom/base/nsTraversal.h49
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diff --git a/dom/base/nsTraversal.h b/dom/base/nsTraversal.h
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+/* -*- 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/. */
+
+/*
+ * Implementation of common traversal methods for TreeWalker and NodeIterator.
+ */
+
+#ifndef nsTraversal_h___
+#define nsTraversal_h___
+
+#include "nsCOMPtr.h"
+#include "mozilla/dom/CallbackObject.h"
+#include "mozilla/dom/NodeFilterBinding.h"
+
+class nsINode;
+
+namespace mozilla {
+class ErrorResult;
+}
+
+class nsTraversal {
+ public:
+ nsTraversal(nsINode* aRoot, uint32_t aWhatToShow,
+ mozilla::dom::NodeFilter* aFilter);
+ virtual ~nsTraversal();
+
+ protected:
+ nsCOMPtr<nsINode> mRoot;
+ uint32_t mWhatToShow;
+ RefPtr<mozilla::dom::NodeFilter> mFilter;
+ bool mInAcceptNode;
+
+ /*
+ * Tests if and how a node should be filtered. Uses mWhatToShow and
+ * mFilter to test the node.
+ * @param aNode Node to test
+ * @param aResult Whether we succeeded
+ * @param aUnskippedNode If non-null is passed, set to aNode if node isn't
+ * filtered out by mWhatToShow.
+ * @returns Filtervalue. See NodeFilter.webidl
+ */
+ int16_t TestNode(nsINode* aNode, mozilla::ErrorResult& aResult,
+ nsCOMPtr<nsINode>* aUnskippedNode = nullptr);
+};
+
+#endif