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System.IUnknown
|
+---System.IDispatch
|
+---System.CATBaseUnknown
|
+---CATIDOMNodeFilter
Usage: you can freely reimplement this interface.
interface CATIDOMNodeFilter
Interface for filters objects that know how to "filter out" nodes.
If a
CATIDOMNodeIterator or
CATIDOMTreeWalker is given a
CATIDOMNodeFilter, it applies the filter before it returns the next node. If the filter says to accept the node, the traversal logic returns
it; otherwise, traversal looks for the next node and pretends that the
node that was rejected was not there.
The DOM does not provide any filters. CATIDOMNodeFilter is just an interface that users can implement to provide their own filters.
CATIDOMNodeFilter instances do not need to know how to traverse from node to node, nor do they need to know anything about the data structure that is being traversed. This makes it very easy to write filters, since the only thing they have to know how to do is evaluate a single node. One filter may be used with a number of different kinds of traversals, encouraging code reuse.
See also the Document Object Model (DOM) Level 2 Traversal and Range Specification.
| public virtual HRESULT AcceptNode( | const CATIDOMNode_var& | iNode, |
| FilterAction& | oAccepted) = 0 |
enum FilterAction {
FILTER_ACCEPT,
FILTER_REJECT,
FILTER_SKIP
}
Constants returned by
AcceptNode
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