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static private SyncToNavigator ( |
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| navigatorThis | ||
| navigatorThat | ||
| return | ||
public void Create(XPathNavigator input, XmlNavigatorFilter filter)
{
// Save input node as current node
_navCurrent = XmlQueryRuntime.SyncToNavigator(_navCurrent, input);
_filter = filter;
_needFirst = true;
}
/// <summary>
/// Initialize the NodeKindContentIterator.
/// </summary>
public void Create(XPathNavigator context, XPathNodeType nodeType)
{
Debug.Assert(nodeType != XPathNodeType.Attribute && nodeType != XPathNodeType.Namespace);
_navCurrent = XmlQueryRuntime.SyncToNavigator(_navCurrent, context);
_nodeType = nodeType;
_needFirst = true;
}
/// <summary>
/// Initialize the ElementContentIterator.
/// </summary>
public void Create(XPathNavigator context, string localName, string ns)
{
this.navCurrent = XmlQueryRuntime.SyncToNavigator(this.navCurrent, context);
this.localName = localName;
this.ns = ns;
this.needFirst = true;
}
public void Create(XPathNavigator input, XmlNavigatorFilter filter)
{
// Save input node as current node
_navCurrent = XmlQueryRuntime.SyncToNavigator(_navCurrent, input);
_filter = filter;
PushAncestors();
}
/// <summary>
/// Initialize the ElementContentIterator.
/// </summary>
public void Create(XPathNavigator context, string localName, string ns)
{
_navCurrent = XmlQueryRuntime.SyncToNavigator(_navCurrent, context);
_localName = localName;
_ns = ns;
_needFirst = true;
}
public void Create(XPathNavigator context, XmlNavigatorFilter filter)
{
// Save context node as current node
_navCurrent = XmlQueryRuntime.SyncToNavigator(_navCurrent, context);
// Attempt to find a matching parent node
_haveCurrent = (_navCurrent.MoveToParent()) && (!filter.IsFiltered(_navCurrent));
}
public void Create(XPathNavigator context, XmlNavigatorFilter filter, bool orSelf)
{
_filter = filter;
// Save context node as current node
_navCurrent = XmlQueryRuntime.SyncToNavigator(_navCurrent, context);
// If self node matches, then next call to MoveNext() should return it
// Otherwise, MoveNext() will fetch next ancestor
_haveCurrent = (orSelf && !_filter.IsFiltered(_navCurrent));
}
/// <summary>
/// Initialize the PrecedingSiblingDocOrderIterator.
/// </summary>
public void Create(XPathNavigator context, XmlNavigatorFilter filter)
{
this.filter = filter;
this.navCurrent = XmlQueryRuntime.SyncToNavigator(this.navCurrent, context);
this.navEnd = XmlQueryRuntime.SyncToNavigator(this.navEnd, context);
this.needFirst = true;
// If the context node will be filtered out, then use ComparePosition to
// determine when the context node has been passed by. Otherwise, IsSamePosition
// is sufficient to determine when the context node has been reached.
this.useCompPos = this.filter.IsFiltered(context);
}
public void Create(XPathNavigator start, XmlNavigatorFilter filter, XPathNavigator end)
{
// Save start node as current node and save ending node
_navCurrent = XmlQueryRuntime.SyncToNavigator(_navCurrent, start);
_navEnd = XmlQueryRuntime.SyncToNavigator(_navEnd, end);
_filter = filter;
if (start.IsSamePosition(end))
{
// Start is end, so only return node if it is not filtered
_state = !filter.IsFiltered(start) ? IteratorState.HaveCurrentNoNext : IteratorState.NoNext;
}
else
{
// Return nodes until end is reached
_state = !filter.IsFiltered(start) ? IteratorState.HaveCurrent : IteratorState.NeedCurrent;
}
}
public void Create(XPathNavigator input, XmlNavigatorFilter filter, bool orSelf)
{
// Save input node as current node
_navCurrent = XmlQueryRuntime.SyncToNavigator(_navCurrent, input);
_filter = filter;
// Position navEnd to the node at which the descendant scan should terminate
if (input.NodeType == XPathNodeType.Root)
{
_navEnd = null;
}
else
{
_navEnd = XmlQueryRuntime.SyncToNavigator(_navEnd, input);
_navEnd.MoveToNonDescendant();
}
// If self node matches, then return it first
_hasFirst = (orSelf && !_filter.IsFiltered(_navCurrent));
}
public IteratorResult MoveNext(XPathNavigator input)
{
if (_state != IteratorState.NeedDescendant)
{
if (input == null)
{
return(IteratorResult.NoMoreNodes);
}
// Descendants of the input node will be duplicates if the input node is in the subtree
// of the previous root.
if (_state != IteratorState.NoPrevious && _navRoot.IsDescendant(input))
{
return(IteratorResult.NeedInputNode);
}
// Save input node as current node and end of input's tree in navEnd
_navCurrent = XmlQueryRuntime.SyncToNavigator(_navCurrent, input);
_navRoot = XmlQueryRuntime.SyncToNavigator(_navRoot, input);
_navEnd = XmlQueryRuntime.SyncToNavigator(_navEnd, input);
_navEnd.MoveToNonDescendant();
_state = IteratorState.NeedDescendant;
// If self node matches, then return it
if (_orSelf && !_filter.IsFiltered(input))
{
return(IteratorResult.HaveCurrentNode);
}
}
if (_filter.MoveToFollowing(_navCurrent, _navEnd))
{
return(IteratorResult.HaveCurrentNode);
}
// No more descendants, so transition to NeedCurrent state and get the next input node
_state = IteratorState.NeedCurrent;
return(IteratorResult.NeedInputNode);
}
/// <summary>
/// Initialize the PrecedingIterator (no possibility of duplicates).
/// </summary>
public void Create(XPathNavigator context, XmlNavigatorFilter filter)
{
// Start at root, which is always first node in the document
this.navCurrent = XmlQueryRuntime.SyncToNavigator(this.navCurrent, context);
this.navCurrent.MoveToRoot();
// If root node is not the ending node,
if (!this.navCurrent.IsSamePosition(context))
{
// Push root onto the stack if it is not filtered
if (!filter.IsFiltered(this.navCurrent))
{
this.stack.Push(this.navCurrent.Clone());
}
// Push all matching nodes onto stack
while (filter.MoveToFollowing(this.navCurrent, context))
{
this.stack.Push(this.navCurrent.Clone());
}
}
}
public void Create(XPathNavigator context, string value)
{
_navCurrent = XmlQueryRuntime.SyncToNavigator(_navCurrent, context);
_idrefs = XmlConvert.SplitString(value);
_idx = -1;
}
public IteratorResult MoveNext(XPathNavigator input)
{
switch (_state)
{
case IteratorState.NeedCandidateCurrent:
// If there are no more input nodes, then iteration is complete
if (input == null)
{
return(IteratorResult.NoMoreNodes);
}
// Save input node as current node
_navCurrent = XmlQueryRuntime.SyncToNavigator(_navCurrent, input);
// Scan for additional input nodes within the same document (since they are after navCurrent in docorder)
_state = IteratorState.HaveCandidateCurrent;
return(IteratorResult.NeedInputNode);
case IteratorState.HaveCandidateCurrent:
// If there are no more input nodes,
if (input == null)
{
// Then candidate node has been selected, and there are no further input nodes
_state = IteratorState.HaveCurrentNoNext;
}
else
{
// If the input node is in the same document as the current node,
if (_navCurrent.ComparePosition(input) != XmlNodeOrder.Unknown)
{
// Then update the current node and get the next input node
_navCurrent = XmlQueryRuntime.SyncToNavigator(_navCurrent, input);
return(IteratorResult.NeedInputNode);
}
// Save the input node as navNext
_navNext = XmlQueryRuntime.SyncToNavigator(_navNext, input);
_state = IteratorState.HaveCurrentHaveNext;
}
PushAncestors();
break;
}
if (!_navStack.IsEmpty)
{
while (true)
{
// Move to the next matching node that is before the top node on the stack in document order
if (_filter.MoveToFollowing(_navCurrent, _navStack.Peek()))
{
// Found match
return(IteratorResult.HaveCurrentNode);
}
// Do not include ancestor nodes as part of the preceding axis
_navCurrent.MoveTo(_navStack.Pop());
// No more preceding matches possible
if (_navStack.IsEmpty)
{
break;
}
}
}
if (_state == IteratorState.HaveCurrentNoNext)
{
// No more nodes, so iteration is complete
_state = IteratorState.NeedCandidateCurrent;
return(IteratorResult.NoMoreNodes);
}
// Make next node the current node and start trying to find input node greatest in docorder
_navCurrent = XmlQueryRuntime.SyncToNavigator(_navCurrent, _navNext);
_state = IteratorState.HaveCandidateCurrent;
return(IteratorResult.HaveCurrentNode);
}
public IteratorResult MoveNext(XPathNavigator input)
{
switch (_state)
{
case IteratorState.NeedCandidateCurrent:
// If there are no more input nodes, then iteration is complete
if (input == null)
{
return(IteratorResult.NoMoreNodes);
}
// Save input node as current node
_navCurrent = XmlQueryRuntime.SyncToNavigator(_navCurrent, input);
// Still must check next input node to see if is a descendant of this one
_state = IteratorState.HaveCandidateCurrent;
return(IteratorResult.NeedInputNode);
case IteratorState.HaveCandidateCurrent:
// If there are no more input nodes,
if (input == null)
{
// Then candidate node has been selected, and there are no further input nodes
_state = IteratorState.HaveCurrentNoNext;
return(MoveFirst());
}
// If input node is in the subtree of the candidate node, then use the input node instead
if (_navCurrent.IsDescendant(input))
{
goto case IteratorState.NeedCandidateCurrent;
}
// Found node on which to perform following scan. Now skip past all input nodes in the same document.
_state = IteratorState.HaveCurrentNeedNext;
goto case IteratorState.HaveCurrentNeedNext;
case IteratorState.HaveCurrentNeedNext:
// If there are no more input nodes,
if (input == null)
{
// Then candidate node has been selected, and there are no further input nodes
_state = IteratorState.HaveCurrentNoNext;
return(MoveFirst());
}
// Skip input node unless it's in a different document than the node on which the following scan was performed
if (_navCurrent.ComparePosition(input) != XmlNodeOrder.Unknown)
{
return(IteratorResult.NeedInputNode);
}
// Next node is in a different document, so save it
_navNext = XmlQueryRuntime.SyncToNavigator(_navNext, input);
_state = IteratorState.HaveCurrentHaveNext;
return(MoveFirst());
}
if (!_filter.MoveToFollowing(_navCurrent, null))
{
return(MoveFailed());
}
return(IteratorResult.HaveCurrentNode);
}
/// <summary>
/// Initialize the ContentIterator.
/// </summary>
public void Create(XPathNavigator context)
{
_navCurrent = XmlQueryRuntime.SyncToNavigator(_navCurrent, context);
_needFirst = true;
}
/// <summary>
/// Position this iterator to the next content or sibling node. Return IteratorResult.NoMoreNodes if there are
/// no more content or sibling nodes. Return IteratorResult.NeedInputNode if the next input node needs to be
/// fetched first. Return IteratorResult.HaveCurrent if the Current property is set to the next node in the
/// iteration.
/// </summary>
internal IteratorResult MoveNext(XPathNavigator input, bool isContent)
{
switch (_state)
{
case IteratorState.NeedCurrent:
// If there are no more input nodes, then iteration is complete
if (input == null)
{
return(IteratorResult.NoMoreNodes);
}
// Save the input node as the current node
_navCurrent = XmlQueryRuntime.SyncToNavigator(_navCurrent, input);
// If matching child or sibling is found, then we have a current node
if (isContent ? _filter.MoveToContent(_navCurrent) :
_filter.MoveToFollowingSibling(_navCurrent))
{
_state = IteratorState.HaveCurrentNeedNext;
}
return(IteratorResult.NeedInputNode);
case IteratorState.HaveCurrentNeedNext:
if (input == null)
{
// There are no more input nodes, so enter HaveCurrentNoNext state and return Current
_state = IteratorState.HaveCurrentNoNext;
return(IteratorResult.HaveCurrentNode);
}
// Save the input node as the next node
_navNext = XmlQueryRuntime.SyncToNavigator(_navNext, input);
// If matching child or sibling is found,
if (isContent ? _filter.MoveToContent(_navNext) :
_filter.MoveToFollowingSibling(_navNext))
{
// Then compare position of current and next nodes
_state = IteratorState.HaveCurrentHaveNext;
return(DocOrderMerge());
}
// Input node does not result in matching child or sibling, so get next input node
return(IteratorResult.NeedInputNode);
case IteratorState.HaveCurrentNoNext:
case IteratorState.HaveCurrentHaveNext:
// If the current node has no more matching siblings,
if (isContent ? !_filter.MoveToNextContent(_navCurrent) :
!_filter.MoveToFollowingSibling(_navCurrent))
{
if (_navStack.IsEmpty)
{
if (_state == IteratorState.HaveCurrentNoNext)
{
// No more input nodes, so iteration is complete
return(IteratorResult.NoMoreNodes);
}
// Make navNext the new current node and fetch a new navNext
_navCurrent = XmlQueryRuntime.SyncToNavigator(_navCurrent, _navNext);
_state = IteratorState.HaveCurrentNeedNext;
return(IteratorResult.NeedInputNode);
}
// Pop new current node from the stack
_navCurrent = _navStack.Pop();
}
// If there is no next node, then no need to call DocOrderMerge; just return the current node
if (_state == IteratorState.HaveCurrentNoNext)
{
return(IteratorResult.HaveCurrentNode);
}
// Compare positions of current and next nodes
return(DocOrderMerge());
}
Debug.Assert(false, "Invalid IteratorState " + _state);
return(IteratorResult.NoMoreNodes);
}
/// <summary>
/// Initialize the FollowingSiblingIterator.
/// </summary>
public void Create(XPathNavigator context, XmlNavigatorFilter filter)
{
this.navCurrent = XmlQueryRuntime.SyncToNavigator(this.navCurrent, context);
this.filter = filter;
}
