Re:question: NodeIterator in DOM
Hi, Another question regarding NodeIterator: You have an NodeIterator instance with the iterator position set somewhere in the middle. When you remove three nodes: first, the node just after the iterator position, second the node after this removed node, and finally the node just before the original iterator position, then what should toNextNode() and toPrevNode() return? in example: we have nodes A B C D E. the iterator is positioned just before C. remove C, D, and B. then we have A E and the iterator position should be positioned just before E. so toNextNode() and toPrevNode() should return E and A, respectively. NodeIterator may mark its current iterator position by an integer offset or by an object reference. but it must be notified for certain insert and remove operations to preserve the above semantics. Is it correct? Thanks aki ---- original message Hi, I have a question on NodeIterator in DOM-19980416. Excerpt from the spec: If a node is inserted before the node just after the iterator position, it will be returned by getNextNode(); likewise if a node is inserted after the node just previous to the iterator position, it will be return by the next getPrevNode() call. The first part is clear. When a Node is inserted by insertBefore() at the node just before the iterator position, the iterator position is set in front of this new node. The second part starting "likewise.." is not clear to me. Are we assuming the existance of the insertAfter() method? It sounds like the insertion position (relative to the nodes) is the same as in the first case. If we only have the insertBefore() method in the Node inteface, how can we distinguish the above two cases? thanks in advance for any clarification aki xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ To (un)subscribe, mailto:majordomo@i... the following message; (un)subscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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