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