1 files changed, 57 insertions, 0 deletions
diff --git a/editor/libeditor/EditAggregateTransaction.h b/editor/libeditor/EditAggregateTransaction.h
new file mode 100644
index 0000000000..2017d4f7ff
--- /dev/null
+++ b/editor/libeditor/EditAggregateTransaction.h
@@ -0,0 +1,57 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 EditAggregateTransaction_h
+#define EditAggregateTransaction_h
+
+#include "EditTransactionBase.h"
+
+#include "mozilla/OwningNonNull.h"
+#include "mozilla/RefPtr.h"
+
+#include "nsAtom.h"
+#include "nsCOMPtr.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsTArray.h"
+#include "nsISupportsImpl.h"
+
+namespace mozilla {
+
+/**
+ * base class for all document editing transactions that require aggregation.
+ * provides a list of child transactions.
+ */
+class EditAggregateTransaction : public EditTransactionBase {
+ public:
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(EditAggregateTransaction,
+                                           EditTransactionBase)
+
+  NS_DECL_EDITTRANSACTIONBASE
+
+  MOZ_CAN_RUN_SCRIPT NS_IMETHOD RedoTransaction() override;
+  NS_IMETHOD Merge(nsITransaction* aOtherTransaction, bool* aDidMerge) override;
+
+  /**
+   * Get the name assigned to this transaction.
+   */
+  nsAtom* GetName() const;
+
+  const nsTArray<OwningNonNull<EditTransactionBase>>& ChildTransactions()
+      const {
+    return mChildren;
+  }
+
+ protected:
+  EditAggregateTransaction() = default;
+  virtual ~EditAggregateTransaction() = default;
+
+  nsTArray<OwningNonNull<EditTransactionBase>> mChildren;
+  RefPtr<nsAtom> mName;
+};
+
+}  // namespace mozilla
+
+#endif  // #ifndef EditAggregateTransaction_h