# from PyQt4.QtXml import QDomNode

class domItem:
    # wrapper around PyQt4.QtXml.QDomNode
    # it keeps an hash of childrens for
    # performance reasons

    def __init__(self, node, row, parent = 0):
        # node is of type PyQt4.QtXml.QDomNode
        self.domNode = node
        self.parentItem = parent
        self.rowNumber = row
        self.childItems = {}

    def child(self, i):
        if i in self.childItems:
            return self.childItems[i]
        if i >= 0 and i < self.domNode.childNodes().count():
            childNode = self.domNode.childNodes().item(i)
            childItem = domItem(childNode, i, self)
            self.childItems[i] = childItem
            return childItem
        return None
            
    def parent(self):
        return self.parentItem

    def node(self):
        return self.domNode

    def row(self):
        return self.rowNumber