gecko/editor/libeditor/base/SplitElementTxn.h
Ehsan Akhgari ff1c5bbcf7 Bug 791907 - Remove prtypes.h #includes in editor/; r=jrmuizel
--HG--
extra : rebase_source : 93c2e11edeaa2f7275302a2c7499aa09c330da14
2012-09-17 22:58:51 -04:00

67 lines
2.1 KiB
C++

/* -*- 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 SplitElementTxn_h__
#define SplitElementTxn_h__
#include "EditTxn.h" // for EditTxn, NS_DECL_EDITTXN
#include "nsCOMPtr.h" // for nsCOMPtr
#include "nsCycleCollectionParticipant.h"
#include "nsIDOMNode.h" // for nsIDOMNode
#include "nsISupportsImpl.h" // for NS_DECL_ISUPPORTS_INHERITED
#include "nscore.h" // for NS_IMETHOD
class nsEditor;
/**
* A transaction that splits an element E into two identical nodes, E1 and E2
* with the children of E divided between E1 and E2.
*/
class SplitElementTxn : public EditTxn
{
public:
/** initialize the transaction.
* @param aEditor the provider of core editing operations
* @param aNode the node to split
* @param aOffset the location within aNode to do the split.
* aOffset may refer to children of aNode, or content of aNode.
* The left node will have child|content 0..aOffset-1.
*/
NS_IMETHOD Init (nsEditor *aEditor,
nsIDOMNode *aNode,
int32_t aOffset);
SplitElementTxn();
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SplitElementTxn, EditTxn)
NS_DECL_EDITTXN
NS_IMETHOD RedoTransaction(void);
NS_IMETHOD GetNewNode(nsIDOMNode **aNewNode);
protected:
/** the element to operate upon */
nsCOMPtr<nsIDOMNode> mExistingRightNode;
/** the offset into mElement where the children of mElement are split.<BR>
* mOffset is the index of the first child in the right node.
* -1 means the new node gets no children.
*/
int32_t mOffset;
/** the element we create when splitting mElement */
nsCOMPtr<nsIDOMNode> mNewLeftNode;
/** the parent shared by mExistingRightNode and mNewLeftNode */
nsCOMPtr<nsIDOMNode> mParent;
nsEditor* mEditor;
};
#endif