1 files changed, 61 insertions, 0 deletions
diff --git a/dom/base/PartialSHistory.h b/dom/base/PartialSHistory.h
new file mode 100644
index 0000000000..5e8a435e67
--- /dev/null
+++ b/dom/base/PartialSHistory.h
@@ -0,0 +1,61 @@
+/* -*- 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 PartialSHistory_h
+#define PartialSHistory_h
+
+#include "nsCycleCollectionParticipant.h"
+#include "nsFrameLoader.h"
+#include "nsIGroupedSHistory.h"
+#include "nsIPartialSHistoryListener.h"
+#include "nsIPartialSHistory.h"
+#include "nsISHistory.h"
+#include "nsISHistoryListener.h"
+#include "TabParent.h"
+
+namespace mozilla {
+namespace dom {
+
+class PartialSHistory final : public nsIPartialSHistory,
+                              public nsISHistoryListener,
+                              public nsIPartialSHistoryListener,
+                              public nsSupportsWeakReference
+{
+public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(PartialSHistory, nsIPartialSHistory)
+  NS_DECL_NSIPARTIALSHISTORY
+  NS_DECL_NSIPARTIALSHISTORYLISTENER
+  NS_DECL_NSISHISTORYLISTENER
+
+  /**
+   * Note that PartialSHistory must be constructed after frameloader has
+   * created a valid docshell or tabparent.
+   */
+  explicit PartialSHistory(nsIFrameLoader* aOwnerFrameLoader);
+
+private:
+  ~PartialSHistory() {}
+  already_AddRefed<nsISHistory> GetSessionHistory();
+  already_AddRefed<TabParent> GetTabParent();
+
+  // The cache of number of entries in corresponding nsISHistory. It's only
+  // used for remote process case. If nsISHistory is in-process, mCount will not
+  // be used at all.
+  uint32_t mCount;
+
+  // The cache of globalIndexOffset in corresponding nsISHistory. It's only
+  // used for remote process case.
+  uint32_t mGlobalIndexOffset;
+
+  // The frameloader which owns this PartialSHistory.
+  nsCOMPtr<nsIFrameLoader> mOwnerFrameLoader;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif /* PartialSHistory_h */