70 lines
2.0 KiB
C++
70 lines
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 ChangeAttributeTxn_h__
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#define ChangeAttributeTxn_h__
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#include "EditTxn.h" // base class
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#include "mozilla/Attributes.h" // override
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#include "nsCOMPtr.h" // nsCOMPtr members
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#include "nsCycleCollectionParticipant.h" // NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED
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#include "nsISupportsImpl.h" // NS_DECL_ISUPPORTS_INHERITED
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#include "nsString.h" // nsString members
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class nsIAtom;
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namespace mozilla {
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namespace dom {
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class Element;
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/**
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* A transaction that changes an attribute of a content node. This transaction
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* covers add, remove, and change attribute.
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*/
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class ChangeAttributeTxn : public EditTxn
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{
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public:
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/** @param aElement the element whose attribute will be changed
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* @param aAttribute the name of the attribute to change
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* @param aValue the new value for aAttribute, or null to remove
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*/
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ChangeAttributeTxn(Element& aElement, nsIAtom& aAttribute,
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const nsAString* aValue);
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ChangeAttributeTxn, EditTxn)
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NS_DECL_EDITTXN
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NS_IMETHOD RedoTransaction() override;
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private:
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virtual ~ChangeAttributeTxn();
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/** The element to operate upon */
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nsCOMPtr<Element> mElement;
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/** The attribute to change */
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nsCOMPtr<nsIAtom> mAttribute;
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/** The value to set the attribute to (ignored if mRemoveAttribute==true) */
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nsString mValue;
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/** True if the operation is to remove mAttribute from mElement */
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bool mRemoveAttribute;
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/** True if the mAttribute was set on mElement at the time of execution */
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bool mAttributeWasSet;
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/** The value to set the attribute to for undo */
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nsString mUndoValue;
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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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