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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 DeleteTextTransaction_h
#define DeleteTextTransaction_h
#include "mozilla/EditTransactionBase.h"
#include "nsCOMPtr.h"
#include "nsCycleCollectionParticipant.h"
#include "nsGenericDOMDataNode.h"
#include "nsID.h"
#include "nsString.h"
#include "nscore.h"
namespace mozilla {
class EditorBase;
class RangeUpdater;
/**
* A transaction that removes text from a content node.
*/
class DeleteTextTransaction final : public EditTransactionBase
{
public:
/**
* Initialize the transaction.
* @param aEditorBase The provider of basic editing operations.
* @param aElement The content node to remove text from.
* @param aOffset The location in aElement to begin the deletion.
* @param aNumCharsToDelete The number of characters to delete. Not the
* number of bytes!
*/
DeleteTextTransaction(EditorBase& aEditorBase,
nsGenericDOMDataNode& aCharData,
uint32_t aOffset,
uint32_t aNumCharsToDelete,
RangeUpdater* aRangeUpdater);
nsresult Init();
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(DeleteTextTransaction,
EditTransactionBase)
NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr) override;
NS_DECL_EDITTRANSACTIONBASE
uint32_t GetOffset() { return mOffset; }
uint32_t GetNumCharsToDelete() { return mNumCharsToDelete; }
protected:
// The provider of basic editing operations.
EditorBase& mEditorBase;
// The CharacterData node to operate upon.
RefPtr<nsGenericDOMDataNode> mCharData;
// The offset into mCharData where the deletion is to take place.
uint32_t mOffset;
// The number of characters to delete.
uint32_t mNumCharsToDelete;
// The text that was deleted.
nsString mDeletedText;
// Range updater object.
RangeUpdater* mRangeUpdater;
};
} // namespace mozilla
#endif // #ifndef DeleteTextTransaction_h
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