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#ifndef DeleteElementTxn_h__
#define DeleteElementTxn_h__

#include "EditTxn.h"

#include "nsIDOMNode.h"
#include "nsIEditor.h"
#include "nsCOMPtr.h"

class nsRangeUpdater;

/**
 * A transaction that deletes a single element
 */
class DeleteElementTxn : public EditTxn
{
public:
  /** initialize the transaction.
    * @param aElement the node to delete
    */
  NS_IMETHOD Init(nsIEditor *aEditor, nsIDOMNode *aElement, nsRangeUpdater *aRangeUpdater);

  DeleteElementTxn();

  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(DeleteElementTxn, EditTxn)
  NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr);

  NS_DECL_EDITTXN

  NS_IMETHOD RedoTransaction();

protected:
  
  /** the element to delete */
  nsCOMPtr<nsIDOMNode> mElement;

  /** parent of node to delete */
  nsCOMPtr<nsIDOMNode> mParent;

  /** next sibling to remember for undo/redo purposes */
  nsCOMPtr<nsIDOMNode> mRefNode;

  /** the editor for this transaction */
  nsIEditor* mEditor;

  /** range updater object */
  nsRangeUpdater *mRangeUpdater;
};

#endif