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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 "EditorForwards.h"
#include "EditTransactionBase.h" // for EditorTransactionBase
#include "nsCOMPtr.h" // for nsCOMPtr
#include "nsCycleCollectionParticipant.h"
#include "nsIContent.h"
#include "nsISupportsImpl.h" // for NS_DECL_ISUPPORTS_INHERITED
#include "nscore.h" // for NS_IMETHOD
namespace mozilla {
/**
* A transaction that splits a node into two identical nodes, with the children
* divided between the new nodes.
*/
class SplitNodeTransaction final : public EditTransactionBase {
private:
template <typename PT, typename CT>
SplitNodeTransaction(HTMLEditor& aHTMLEditor,
const EditorDOMPointBase<PT, CT>& aStartOfRightContent);
public:
/**
* Creates a transaction to create a new node identical to an existing node,
* and split the contents between the same point in both nodes.
*
* @param aHTMLEditor The provider of core editing operations.
* @param aStartOfRightContent The point to split. Its container will be
* split, and its preceding or following
* content will be moved to the new node. And
* the point will be start of the right node or
* end of the left node.
*/
template <typename PT, typename CT>
static already_AddRefed<SplitNodeTransaction> Create(
HTMLEditor& aHTMLEditor,
const EditorDOMPointBase<PT, CT>& aStartOfRightContent);
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SplitNodeTransaction,
EditTransactionBase)
NS_DECL_EDITTRANSACTIONBASE
NS_DECL_EDITTRANSACTIONBASE_GETASMETHODS_OVERRIDE(SplitNodeTransaction)
MOZ_CAN_RUN_SCRIPT NS_IMETHOD RedoTransaction() override;
// Note that we don't support join/split node direction switching per
// transaction.
[[nodiscard]] SplitNodeDirection GetSplitNodeDirection() const;
[[nodiscard]] JoinNodesDirection GetJoinNodesDirection() const;
nsIContent* GetSplitContent() const { return mSplitContent; }
nsIContent* GetNewContent() const { return mNewContent; }
nsINode* GetParentNode() const { return mParentNode; }
// The split offset. At undoing, this is recomputed with tracking the
// first child of mSplitContent.
uint32_t SplitOffset() const { return mSplitOffset; }
friend std::ostream& operator<<(std::ostream& aStream,
const SplitNodeTransaction& aTransaction);
protected:
virtual ~SplitNodeTransaction() = default;
MOZ_CAN_RUN_SCRIPT Result<SplitNodeResult, nsresult> DoTransactionInternal(
HTMLEditor& aHTMLEditor, nsIContent& aSplittingContent,
nsIContent& aNewContent, uint32_t aSplitOffset);
RefPtr<HTMLEditor> mHTMLEditor;
// The node which should be parent of both mNewContent and mSplitContent.
nsCOMPtr<nsINode> mParentNode;
// The node we create when splitting mSplitContent.
nsCOMPtr<nsIContent> mNewContent;
// The content node which we split.
nsCOMPtr<nsIContent> mSplitContent;
// The offset where we split in mSplitContent. This is required for doing and
// redoing. Therefore, this is updated when undoing.
uint32_t mSplitOffset;
};
} // namespace mozilla
#endif // #ifndef SplitNodeTransaction_h
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