public override bool MoveToNextNamespace(XPathNamespaceScope namespaceScope)
{
//StreamUtil.WriteText("I:\\debug.txt","进到 MoveToNextNamespace()\r\n");
Debug.Assert(this.m_navigatorState.CurItem != null, "");
if (this.m_navigatorState.CurItem == this.m_navigatorState.VirtualRoot)
{
return(false);
}
if (!(this.m_navigatorState.CurItem is AttrItem))
{
return(false);
}
AttrItem attr = (AttrItem)this.m_navigatorState.CurItem;
if (attr.IsNamespace == false)
{
return(false);
}
ElementItem element = (ElementItem)attr.parent;
ItemList namespaceList = element.NamespaceList;
if (namespaceList.Count > 0)
{
int nIndex = namespaceList.IndexOf(this.m_navigatorState.CurItem);
if (nIndex == -1)
{
return(false);
}
if (nIndex + 1 >= namespaceList.Count)
{
return(false);
}
this.m_navigatorState.CurItem = namespaceList[nIndex + 1];
return(true);
}
return(false);
}
// 得到startItem的一个附近的节点
// MoveMember.Auto 先下，再上，再父亲
// MoveMember.Front 前方
// MoveMember.Behind 方
public static Item GetNearItem(Item startItem,
MoveMember moveMember)
{
Item item = startItem;
if (item == null)
{
return(null);
}
if (item.parent == null)
{
return(null);
}
int nRet = -1;
ItemList aItem = null;
// 如果item的parent对象是ElementItem，先试图找其儿子
if (item.parent != null)
{
aItem = item.parent.children;
if (aItem != null)
{
nRet = aItem.IndexOf(item);
}
if (nRet == -1)
{
Debug.Assert(item.parent != null,
"上面已经判断过了");
aItem = ((ElementItem)item.parent).attrs;
if (aItem != null)
{
nRet = aItem.IndexOf(item);
}
}
}
if (nRet == -1)
{
return(null);
}
Debug.Assert(aItem != null, "上面已经判断过了nRet");
if (moveMember == MoveMember.Auto)
{
if (aItem.Count > nRet + 1) //返回下一个
{
return(aItem[nRet + 1]);
}
else if (nRet > 0)
{
return(aItem[nRet - 1]); // 返回上一个
}
}
if (moveMember == MoveMember.Front)
{
if (nRet > 0)
{
return(aItem[nRet - 1]);
}
}
if (moveMember == MoveMember.Behind)
{
if (aItem.Count > nRet + 1)
{
return(aItem[nRet + 1]);
}
}
return(item.parent); //返回父亲
}
