The Tor Browser: editor/libeditor/base/SplitElementTxn.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifndef SplitElementTxn_h__

     7 #define SplitElementTxn_h__

     9 #include "EditTxn.h"                    // for EditTxn, NS_DECL_EDITTXN

    10 #include "nsCOMPtr.h"                   // for nsCOMPtr

    11 #include "nsCycleCollectionParticipant.h"

    12 #include "nsIDOMNode.h"                 // for nsIDOMNode

    13 #include "nsISupportsImpl.h"            // for NS_DECL_ISUPPORTS_INHERITED

    14 #include "nscore.h"                     // for NS_IMETHOD

    16 class nsEditor;

    18 /**

    19  * A transaction that splits an element E into two identical nodes, E1 and E2

    20  * with the children of E divided between E1 and E2.

    21  */

    22 class SplitElementTxn : public EditTxn

    23 {

    24 public:

    25   /** initialize the transaction.

    26     * @param aEditor  the provider of core editing operations

    27     * @param aNode    the node to split

    28     * @param aOffset  the location within aNode to do the split.

    29     *                 aOffset may refer to children of aNode, or content of aNode.

    30     *                 The left node will have child|content 0..aOffset-1.

    31     */

    32   NS_IMETHOD Init (nsEditor   *aEditor,

    33                    nsIDOMNode *aNode,

    34                    int32_t     aOffset);

    36   SplitElementTxn();

    38   NS_DECL_ISUPPORTS_INHERITED

    39   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SplitElementTxn, EditTxn)

    41   NS_DECL_EDITTXN

    43   NS_IMETHOD RedoTransaction(void);

    45   NS_IMETHOD GetNewNode(nsIDOMNode **aNewNode);

    47 protected:

    49   /** the element to operate upon */

    50   nsCOMPtr<nsIDOMNode> mExistingRightNode;

    52   /** the offset into mElement where the children of mElement are split.<BR>

    53     * mOffset is the index of the first child in the right node.

    54     * -1 means the new node gets no children.

    55     */

    56   int32_t  mOffset;

    58   /** the element we create when splitting mElement */

    59   nsCOMPtr<nsIDOMNode> mNewLeftNode;

    61   /** the parent shared by mExistingRightNode and mNewLeftNode */

    62   nsCOMPtr<nsIDOMNode> mParent;

    63   nsEditor*  mEditor;

    64 };

    66 #endif

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