1 files changed, 94 insertions, 0 deletions
diff --git a/editor/libeditor/EditTransactionBase.h b/editor/libeditor/EditTransactionBase.h
new file mode 100644
index 0000000000..5fe968ea85
--- /dev/null
+++ b/editor/libeditor/EditTransactionBase.h
@@ -0,0 +1,94 @@
+/* -*- 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 mozilla_EditTransactionBase_h
+#define mozilla_EditTransactionBase_h
+
+#include "nsCycleCollectionParticipant.h"
+#include "nsISupportsImpl.h"
+#include "nsITransaction.h"
+#include "nscore.h"
+
+already_AddRefed<mozilla::EditTransactionBase>
+nsITransaction::GetAsEditTransactionBase() {
+  RefPtr<mozilla::EditTransactionBase> editTransactionBase;
+  return NS_SUCCEEDED(
+             GetAsEditTransactionBase(getter_AddRefs(editTransactionBase)))
+             ? editTransactionBase.forget()
+             : nullptr;
+}
+
+namespace mozilla {
+
+class ChangeAttributeTransaction;
+class ChangeStyleTransaction;
+class CompositionTransaction;
+class CreateElementTransaction;
+class DeleteNodeTransaction;
+class DeleteRangeTransaction;
+class DeleteTextTransaction;
+class EditAggregateTransaction;
+class InsertNodeTransaction;
+class InsertTextTransaction;
+class JoinNodeTransaction;
+class PlaceholderTransaction;
+class ReplaceTextTransaction;
+class SplitNodeTransaction;
+
+#define NS_DECL_GETASTRANSACTION_BASE(aClass) \
+  virtual aClass* GetAs##aClass();            \
+  virtual const aClass* GetAs##aClass() const;
+
+/**
+ * Base class for all document editing transactions.
+ */
+class EditTransactionBase : public nsITransaction {
+ public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(EditTransactionBase, nsITransaction)
+
+  MOZ_CAN_RUN_SCRIPT NS_IMETHOD RedoTransaction(void) override;
+  NS_IMETHOD GetIsTransient(bool* aIsTransient) override;
+  NS_IMETHOD Merge(nsITransaction* aTransaction, bool* aDidMerge) override;
+  NS_IMETHOD GetAsEditTransactionBase(
+      EditTransactionBase** aEditTransactionBase) final {
+    MOZ_ASSERT(aEditTransactionBase);
+    MOZ_ASSERT(!*aEditTransactionBase);
+    *aEditTransactionBase = do_AddRef(this).take();
+    return NS_OK;
+  }
+
+  NS_DECL_GETASTRANSACTION_BASE(ChangeAttributeTransaction)
+  NS_DECL_GETASTRANSACTION_BASE(ChangeStyleTransaction)
+  NS_DECL_GETASTRANSACTION_BASE(CompositionTransaction)
+  NS_DECL_GETASTRANSACTION_BASE(CreateElementTransaction)
+  NS_DECL_GETASTRANSACTION_BASE(DeleteNodeTransaction)
+  NS_DECL_GETASTRANSACTION_BASE(DeleteRangeTransaction)
+  NS_DECL_GETASTRANSACTION_BASE(DeleteTextTransaction)
+  NS_DECL_GETASTRANSACTION_BASE(EditAggregateTransaction)
+  NS_DECL_GETASTRANSACTION_BASE(InsertNodeTransaction)
+  NS_DECL_GETASTRANSACTION_BASE(InsertTextTransaction)
+  NS_DECL_GETASTRANSACTION_BASE(JoinNodeTransaction)
+  NS_DECL_GETASTRANSACTION_BASE(PlaceholderTransaction)
+  NS_DECL_GETASTRANSACTION_BASE(ReplaceTextTransaction)
+  NS_DECL_GETASTRANSACTION_BASE(SplitNodeTransaction)
+
+ protected:
+  virtual ~EditTransactionBase() = default;
+};
+
+#undef NS_DECL_GETASTRANSACTION_BASE
+
+}  // namespace mozilla
+
+#define NS_DECL_EDITTRANSACTIONBASE                       \
+  MOZ_CAN_RUN_SCRIPT NS_IMETHOD DoTransaction() override; \
+  MOZ_CAN_RUN_SCRIPT NS_IMETHOD UndoTransaction() override;
+
+#define NS_DECL_EDITTRANSACTIONBASE_GETASMETHODS_OVERRIDE(aClass) \
+  aClass* GetAs##aClass() final { return this; }                  \
+  const aClass* GetAs##aClass() const final { return this; }
+
+#endif  // #ifndef mozilla_EditTransactionBase_h