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