1 files changed, 68 insertions, 0 deletions
diff --git a/layout/inspector/inDeepTreeWalker.h b/layout/inspector/inDeepTreeWalker.h
new file mode 100644
index 0000000000..511c1996c8
--- /dev/null
+++ b/layout/inspector/inDeepTreeWalker.h
@@ -0,0 +1,68 @@
+/* -*- 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/. */
+
+#ifndef __inDeepTreeWalker_h___
+#define __inDeepTreeWalker_h___
+
+#include "inIDeepTreeWalker.h"
+
+#include "nsCOMPtr.h"
+#include "nsINode.h"
+#include "nsTArray.h"
+
+class nsINodeList;
+
+class inDeepTreeWalker final : public inIDeepTreeWalker {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_INIDEEPTREEWALKER
+
+  inDeepTreeWalker();
+
+  nsresult SetCurrentNode(nsINode* aCurrentNode, nsINodeList* aSiblings);
+
+ protected:
+  virtual ~inDeepTreeWalker();
+
+  already_AddRefed<nsINode> GetParent();
+  nsresult EdgeChild(nsINode** _retval, bool aReverse);
+
+  bool mShowAnonymousContent;
+  bool mShowSubDocuments;
+  bool mShowDocumentsAsNodes;
+
+  // The root node. previousNode and parentNode will return
+  // null from here.
+  nsCOMPtr<nsINode> mRoot;
+  nsCOMPtr<nsINode> mCurrentNode;
+
+  // We cache the siblings of mCurrentNode as a list of nodes.
+  // Notes: normally siblings are all the children of the parent
+  // of mCurrentNode (that are interesting for use for the walk)
+  // and mCurrentIndex is the index of mCurrentNode in that list
+  // But if mCurrentNode is a (sub) document then instead of
+  // storing a list that has only one element (the document)
+  // and setting mCurrentIndex to null, we set mSibilings to null.
+  // The reason for this is purely technical, since nsINodeList is
+  // nsIContent based hence we cannot use it to store a document node.
+  nsCOMPtr<nsINodeList> mSiblings;
+
+  // Index of mCurrentNode in the mSiblings list.
+  int32_t mCurrentIndex;
+
+  // Currently unused. Should be a filter for nodes.
+  uint32_t mWhatToShow;
+};
+
+// {BFCB82C2-5611-4318-90D6-BAF4A7864252}
+#define IN_DEEPTREEWALKER_CID                        \
+  {                                                  \
+    0xbfcb82c2, 0x5611, 0x4318, {                    \
+      0x90, 0xd6, 0xba, 0xf4, 0xa7, 0x86, 0x42, 0x52 \
+    }                                                \
+  }
+
+#endif  // __inDeepTreeWalker_h___