72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef SplitNodeTransaction_h
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#define SplitNodeTransaction_h
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#include "mozilla/EditTransactionBase.h" // for EditTxn, etc.
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#include "nsCOMPtr.h" // for nsCOMPtr
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#include "nsCycleCollectionParticipant.h"
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#include "nsISupportsImpl.h" // for NS_DECL_ISUPPORTS_INHERITED
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#include "nscore.h" // for NS_IMETHOD
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class nsIContent;
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class nsINode;
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namespace mozilla {
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class EditorBase;
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/**
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* A transaction that splits a node into two identical nodes, with the children
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* divided between the new nodes.
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*/
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class SplitNodeTransaction final : public EditTransactionBase
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{
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public:
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/**
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* @param aEditorBase The provider of core editing operations
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* @param aNode The node to split
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* @param aOffset The location within aNode to do the split. aOffset may
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* refer to children of aNode, or content of aNode. The
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* left node will have child|content 0..aOffset-1.
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*/
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SplitNodeTransaction(EditorBase& aEditorBase, nsIContent& aNode,
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int32_t aOffset);
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SplitNodeTransaction,
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EditTransactionBase)
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NS_DECL_EDITTRANSACTIONBASE
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NS_IMETHOD RedoTransaction() override;
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nsIContent* GetNewNode();
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protected:
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virtual ~SplitNodeTransaction();
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RefPtr<EditorBase> mEditorBase;
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// The node to operate upon.
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nsCOMPtr<nsIContent> mExistingRightNode;
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// The offset into mExistingRightNode where its children are split. mOffset
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// is the index of the first child in the right node. -1 means the new node
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// gets no children.
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int32_t mOffset;
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// The node we create when splitting mExistingRightNode.
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nsCOMPtr<nsIContent> mNewLeftNode;
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// The parent shared by mExistingRightNode and mNewLeftNode.
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nsCOMPtr<nsINode> mParent;
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};
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} // namespace mozilla
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#endif // #ifndef SplitNodeTransaction_h
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