1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/editor/libeditor/base/JoinElementTxn.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,63 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef JoinElementTxn_h__
1.10 +#define JoinElementTxn_h__
1.11 +
1.12 +#include "EditTxn.h" // for EditTxn, NS_DECL_EDITTXN
1.13 +#include "nsCOMPtr.h" // for nsCOMPtr
1.14 +#include "nsCycleCollectionParticipant.h"
1.15 +#include "nsID.h" // for REFNSIID
1.16 +#include "nsIDOMNode.h" // for nsIDOMNode
1.17 +#include "nscore.h" // for NS_IMETHOD
1.18 +
1.19 +class nsEditor;
1.20 +
1.21 +/**
1.22 + * A transaction that joins two elements E1 (left node) and E2 (right node)
1.23 + * into a single node E.
1.24 + * The children of E are the children of E1 followed by the children of E2.
1.25 + * After DoTransaction() and RedoTransaction(), E1 is removed from the content
1.26 + * tree and E2 remains.
1.27 + */
1.28 +class JoinElementTxn : public EditTxn
1.29 +{
1.30 +public:
1.31 + /** initialize the transaction
1.32 + * @param aEditor the provider of core editing operations
1.33 + * @param aLeftNode the first of two nodes to join
1.34 + * @param aRightNode the second of two nodes to join
1.35 + */
1.36 + NS_IMETHOD Init(nsEditor *aEditor,
1.37 + nsIDOMNode *aLeftNode,
1.38 + nsIDOMNode *aRightNode);
1.39 +
1.40 + JoinElementTxn();
1.41 +
1.42 + NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(JoinElementTxn, EditTxn)
1.43 + NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr);
1.44 +
1.45 + NS_DECL_EDITTXN
1.46 +
1.47 +protected:
1.48 +
1.49 + /** the elements to operate upon.
1.50 + * After the merge, mRightNode remains and mLeftNode is removed from the content tree.
1.51 + */
1.52 + nsCOMPtr<nsIDOMNode> mLeftNode;
1.53 + nsCOMPtr<nsIDOMNode> mRightNode;
1.54 +
1.55 + /** the offset into mNode where the children of mElement are split (for undo).<BR>
1.56 + * mOffset is the index of the first child in the right node.
1.57 + * -1 means the left node had no children.
1.58 + */
1.59 + uint32_t mOffset;
1.60 +
1.61 + /** the parent node containing mLeftNode and mRightNode */
1.62 + nsCOMPtr<nsIDOMNode> mParent;
1.63 + nsEditor* mEditor;
1.64 +};
1.65 +
1.66 +#endif
