1 files changed, 84 insertions, 0 deletions
diff --git a/editor/libeditor/CreateElementTransaction.h b/editor/libeditor/CreateElementTransaction.h
new file mode 100644
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+++ b/editor/libeditor/CreateElementTransaction.h
@@ -0,0 +1,84 @@
+/* -*- 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 CreateElementTransaction_h
+#define CreateElementTransaction_h
+
+#include "mozilla/EditorDOMPoint.h"
+#include "mozilla/EditTransactionBase.h"
+#include "mozilla/RefPtr.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsISupportsImpl.h"
+
+class nsAtom;
+
+/**
+ * A transaction that creates a new node in the content tree.
+ */
+namespace mozilla {
+namespace dom {
+class Element;
+}
+
+class EditorBase;
+
+class CreateElementTransaction final : public EditTransactionBase {
+ protected:
+  template <typename PT, typename CT>
+  CreateElementTransaction(EditorBase& aEditorBase, nsAtom& aTag,
+                           const EditorDOMPointBase<PT, CT>& aPointToInsert);
+
+ public:
+  /**
+   * Create a transaction for creating a new child node of the container of
+   * aPointToInsert of type aTag.
+   *
+   * @param aEditorBase     The editor which manages the transaction.
+   * @param aTag            The tag (P, HR, TABLE, etc.) for the new element.
+   * @param aPointToInsert  The new node will be inserted before the child at
+   *                        aPointToInsert.  If this refers end of the container
+   *                        or after, the new node will be appended to the
+   *                        container.
+   */
+  template <typename PT, typename CT>
+  static already_AddRefed<CreateElementTransaction> Create(
+      EditorBase& aEditorBase, nsAtom& aTag,
+      const EditorDOMPointBase<PT, CT>& aPointToInsert);
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(CreateElementTransaction,
+                                           EditTransactionBase)
+
+  NS_DECL_EDITTRANSACTIONBASE
+  NS_DECL_EDITTRANSACTIONBASE_GETASMETHODS_OVERRIDE(CreateElementTransaction)
+
+  MOZ_CAN_RUN_SCRIPT NS_IMETHOD RedoTransaction() override;
+
+  dom::Element* GetNewElement() const { return mNewElement; }
+
+ protected:
+  virtual ~CreateElementTransaction() = default;
+
+  /**
+   * InsertNewNode() inserts mNewNode before the child node at mPointToInsert.
+   */
+  MOZ_CAN_RUN_SCRIPT void InsertNewNode(ErrorResult& aError);
+
+  // The document into which the new node will be inserted.
+  RefPtr<EditorBase> mEditorBase;
+
+  // The tag (mapping to object type) for the new element.
+  RefPtr<nsAtom> mTag;
+
+  // The DOM point we will insert mNewNode.
+  EditorDOMPoint mPointToInsert;
+
+  // The new node to insert.
+  RefPtr<dom::Element> mNewElement;
+};
+
+}  // namespace mozilla
+
+#endif  // #ifndef CreateElementTransaction_h