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37 :
38 : #ifndef SplitElementTxn_h__
39 : #define SplitElementTxn_h__
40 :
41 : #include "EditTxn.h"
42 : #include "nsIDOMNode.h"
43 : #include "nsCOMPtr.h"
44 : #include "nsIEditor.h"
45 :
46 : class nsEditor;
47 :
48 : /**
49 : * A transaction that splits an element E into two identical nodes, E1 and E2
50 : * with the children of E divided between E1 and E2.
51 : */
52 : class SplitElementTxn : public EditTxn
53 0 : {
54 : public:
55 : /** initialize the transaction.
56 : * @param aEditor the provider of core editing operations
57 : * @param aNode the node to split
58 : * @param aOffset the location within aNode to do the split.
59 : * aOffset may refer to children of aNode, or content of aNode.
60 : * The left node will have child|content 0..aOffset-1.
61 : */
62 : NS_IMETHOD Init (nsEditor *aEditor,
63 : nsIDOMNode *aNode,
64 : PRInt32 aOffset);
65 :
66 : SplitElementTxn();
67 :
68 : NS_DECL_ISUPPORTS_INHERITED
69 1464 : NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SplitElementTxn, EditTxn)
70 :
71 : NS_DECL_EDITTXN
72 :
73 : NS_IMETHOD RedoTransaction(void);
74 :
75 : NS_IMETHOD GetNewNode(nsIDOMNode **aNewNode);
76 :
77 : protected:
78 :
79 : /** the element to operate upon */
80 : nsCOMPtr<nsIDOMNode> mExistingRightNode;
81 :
82 : /** the offset into mElement where the children of mElement are split.<BR>
83 : * mOffset is the index of the first child in the right node.
84 : * -1 means the new node gets no children.
85 : */
86 : PRInt32 mOffset;
87 :
88 : /** the element we create when splitting mElement */
89 : nsCOMPtr<nsIDOMNode> mNewLeftNode;
90 :
91 : /** the parent shared by mExistingRightNode and mNewLeftNode */
92 : nsCOMPtr<nsIDOMNode> mParent;
93 : nsEditor* mEditor;
94 : };
95 :
96 : #endif
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