void notifyOfInsertion ( AString mimeType , nsIURL contentSourceURL , nsIDOMDocument sourceDocument , PRBool willDeleteSelection , inout nsIDOMNode docFragment , inout nsIDOMNode contentStartNode , inout PRInt32 contentStartOffset , inout nsIDOMNode contentEndNode , inout PRInt32 contentEndOffset , inout nsIDOMNode insertionPointNode , inout PRInt32 insertionPointOffset , out PRBool continueWithInsertion )

This notification occurs in an editor during these events: open of document (once rendered in window but before editable) paste from clipboard drop from mouse insertion of html (such as with "cmd_insertHTML") It provides a hook so the above actions can be canceled or the data can be modified (using standard DOM APIs) or left untouched. The data that results (if any) from all filter callbacks is what will be used for transaction purposes (undo/redo) except for the open event.

The willDeleteSelection parameter is offered for filters who want to handle the insertion themselves and need to handle drag/drop correctly. The flag is true when the editor intends to delete the selection.

Callers who want to cancel all insertion can simply set continueWithInsertion to PR_FALSE and return. Note: If cancellation occurs during the "open" event, the editor will still be available but will be empty.

Callers who want to allow insertion of the data with no changes can simply set continueWithInsertion to PR_TRUE and return.

Callers who want to modify the content (docFragment) being inserted are responsible for updating contentStartNode, contentStartOffset, contentEndNode, and contentEndOffset (if necessary). Callers are responsible for freeing and addref'ing if they want to completely replace any of the DOM nodes passed in.

The location where insertion will occur should be considered an approximation since the editor may need to adjust it if it deletes the selection as part of the event and later determines that insertion point is an empty container which should also be removed (or in other scenarios such as -moz-user-select:none).

In some scenarios the selection will be deleted. If callers choose to adjust the insertion point, they should be careful that the insertion point is not in the current selection.

The contentStartNode and contentEndNode are not necessarily immediate children of the docFragment. Any nodes outside of the range set by contentStartNode and contentEndNode are for context from the source document.

Arguments:

mimeType: the mimetype used for retrieving data

contentSourceURL: location where docFragment came from

sourceDocument: document where content came from (can be null)

willDeleteSelection: tells hook if selection will/should be deleted

docFragment: fragment of node to be inserted

contentStartNode: node under which content to be inserted begins

contentStartOffset: start offset within contentStartNode

contentEndNode: node under which content to be inserted ends

contentEndOffset: ending offset withing contentEndNode

insertionPointNode: location where insertion will occur

insertionPointOffset: offset within node where insertion occurs

continueWithInsertion: flag to cancel insertion (if desired)