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/* -*- 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 SplitNodeTransaction_h
#define SplitNodeTransaction_h
#include "mozilla/EditTransactionBase.h" // for EditTxn, etc.
#include "nsCOMPtr.h" // for nsCOMPtr
#include "nsCycleCollectionParticipant.h"
#include "nsISupportsImpl.h" // for NS_DECL_ISUPPORTS_INHERITED
#include "nscore.h" // for NS_IMETHOD
class nsIContent;
class nsINode;
namespace mozilla {
class EditorBase;
/**
* A transaction that splits a node into two identical nodes, with the children
* divided between the new nodes.
*/
class SplitNodeTransaction final : public EditTransactionBase
{
public:
/**
* @param aEditorBase The provider of core editing operations
* @param aNode The node to split
* @param aOffset The location within aNode to do the split. aOffset may
* refer to children of aNode, or content of aNode. The
* left node will have child|content 0..aOffset-1.
*/
SplitNodeTransaction(EditorBase& aEditorBase, nsIContent& aNode,
int32_t aOffset);
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SplitNodeTransaction,
EditTransactionBase)
NS_DECL_EDITTRANSACTIONBASE
NS_IMETHOD RedoTransaction() override;
nsIContent* GetNewNode();
protected:
virtual ~SplitNodeTransaction();
RefPtr<EditorBase> mEditorBase;
// The node to operate upon.
nsCOMPtr<nsIContent> mExistingRightNode;
// The offset into mExistingRightNode where its children are split. mOffset
// is the index of the first child in the right node. -1 means the new node
// gets no children.
int32_t mOffset;
// The node we create when splitting mExistingRightNode.
nsCOMPtr<nsIContent> mNewLeftNode;
// The parent shared by mExistingRightNode and mNewLeftNode.
nsCOMPtr<nsINode> mParent;
};
} // namespace mozilla
#endif // #ifndef SplitNodeTransaction_h
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