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