1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/editor/libeditor/base/SplitElementTxn.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,66 @@
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 SplitElementTxn_h__
1.10 +#define SplitElementTxn_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 "nsIDOMNode.h" // for nsIDOMNode
1.16 +#include "nsISupportsImpl.h" // for NS_DECL_ISUPPORTS_INHERITED
1.17 +#include "nscore.h" // for NS_IMETHOD
1.18 +
1.19 +class nsEditor;
1.20 +
1.21 +/**
1.22 + * A transaction that splits an element E into two identical nodes, E1 and E2
1.23 + * with the children of E divided between E1 and E2.
1.24 + */
1.25 +class SplitElementTxn : public EditTxn
1.26 +{
1.27 +public:
1.28 + /** initialize the transaction.
1.29 + * @param aEditor the provider of core editing operations
1.30 + * @param aNode the node to split
1.31 + * @param aOffset the location within aNode to do the split.
1.32 + * aOffset may refer to children of aNode, or content of aNode.
1.33 + * The left node will have child|content 0..aOffset-1.
1.34 + */
1.35 + NS_IMETHOD Init (nsEditor *aEditor,
1.36 + nsIDOMNode *aNode,
1.37 + int32_t aOffset);
1.38 +
1.39 + SplitElementTxn();
1.40 +
1.41 + NS_DECL_ISUPPORTS_INHERITED
1.42 + NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SplitElementTxn, EditTxn)
1.43 +
1.44 + NS_DECL_EDITTXN
1.45 +
1.46 + NS_IMETHOD RedoTransaction(void);
1.47 +
1.48 + NS_IMETHOD GetNewNode(nsIDOMNode **aNewNode);
1.49 +
1.50 +protected:
1.51 +
1.52 + /** the element to operate upon */
1.53 + nsCOMPtr<nsIDOMNode> mExistingRightNode;
1.54 +
1.55 + /** the offset into mElement where the children of mElement are split.<BR>
1.56 + * mOffset is the index of the first child in the right node.
1.57 + * -1 means the new node gets no children.
1.58 + */
1.59 + int32_t mOffset;
1.60 +
1.61 + /** the element we create when splitting mElement */
1.62 + nsCOMPtr<nsIDOMNode> mNewLeftNode;
1.63 +
1.64 + /** the parent shared by mExistingRightNode and mNewLeftNode */
1.65 + nsCOMPtr<nsIDOMNode> mParent;
1.66 + nsEditor* mEditor;
1.67 +};
1.68 +
1.69 +#endif
