зеркало из https://github.com/mozilla/gecko-dev.git
77 строки
2.0 KiB
C++
77 строки
2.0 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 DeleteTextTxn_h__
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#define DeleteTextTxn_h__
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#include "EditTxn.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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class nsEditor;
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class nsRangeUpdater;
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namespace mozilla {
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namespace dom {
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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 DeleteTextTxn : public EditTxn
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{
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public:
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/** initialize the transaction.
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* @param aEditor 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 number of bytes!
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*/
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DeleteTextTxn(nsEditor& aEditor,
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nsGenericDOMDataNode& aCharData,
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uint32_t aOffset,
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uint32_t aNumCharsToDelete,
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nsRangeUpdater* aRangeUpdater);
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nsresult Init();
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(DeleteTextTxn, EditTxn)
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NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr) override;
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NS_DECL_EDITTXN
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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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nsEditor& mEditor;
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/** the CharacterData node to operate upon */
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nsRefPtr<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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nsRangeUpdater* mRangeUpdater;
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};
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} // namespace dom
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} // namespace mozilla
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#endif
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