/// <summary>
/// Returns:
/// XmlNodeOrder.Unknown -- This navigator and the "other" navigator are not of the same type, or the
/// navigator's are not positioned on nodes in the same document.
/// XmlNodeOrder.Before -- This navigator's current node is before the "other" navigator's current node
/// in document order.
/// XmlNodeOrder.After -- This navigator's current node is after the "other" navigator's current node
/// in document order.
/// XmlNodeOrder.Same -- This navigator is positioned on the same node as the "other" navigator.
/// </summary>
public override XmlNodeOrder ComparePosition(XPathNavigator other)
{
XPathDocumentNavigator that = other as XPathDocumentNavigator;
if (that != null)
{
XPathDocument thisDoc = _pageCurrent[_idxCurrent].Document;
XPathDocument thatDoc = that._pageCurrent[that._idxCurrent].Document;
if ((object)thisDoc == (object)thatDoc)
{
int locThis = GetPrimaryLocation();
int locThat = that.GetPrimaryLocation();
if (locThis == locThat)
{
locThis = GetSecondaryLocation();
locThat = that.GetSecondaryLocation();
if (locThis == locThat)
{
return(XmlNodeOrder.Same);
}
}
return((locThis < locThat) ? XmlNodeOrder.Before : XmlNodeOrder.After);
}
}
return(XmlNodeOrder.Unknown);
}
public override bool IsDescendant(XPathNavigator other)
{
XPathDocumentNavigator navigator = other as XPathDocumentNavigator;
if (navigator != null)
{
XPathNode[] pageParent;
int idxParent;
if (navigator.idxParent != 0)
{
pageParent = navigator.pageParent;
idxParent = navigator.idxParent;
}
else
{
idxParent = navigator.pageCurrent[navigator.idxCurrent].GetParent(out pageParent);
}
while (idxParent != 0)
{
if ((idxParent == this.idxCurrent) && (pageParent == this.pageCurrent))
{
return(true);
}
idxParent = pageParent[idxParent].GetParent(out pageParent);
}
}
return(false);
}
/// <summary>
/// Return true if the "other" navigator's current node is a descendant of this navigator's current node.
/// </summary>
public override bool IsDescendant(XPathNavigator other)
{
XPathDocumentNavigator that = other as XPathDocumentNavigator;
if (that != null)
{
XPathNode[] pageThat;
int idxThat;
// If that current node's parent is virtualized, then start with the virtual parent
if (that._idxParent != 0)
{
pageThat = that._pageParent;
idxThat = that._idxParent;
}
else
{
idxThat = that._pageCurrent[that._idxCurrent].GetParent(out pageThat);
}
while (idxThat != 0)
{
if (idxThat == _idxCurrent && pageThat == _pageCurrent)
{
return(true);
}
idxThat = pageThat[idxThat].GetParent(out pageThat);
}
}
return(false);
}
public override XmlNodeOrder ComparePosition(XPathNavigator other)
{
XPathDocumentNavigator navigator = other as XPathDocumentNavigator;
if (navigator != null)
{
XPathDocument document = this.pageCurrent[this.idxCurrent].Document;
XPathDocument document2 = navigator.pageCurrent[navigator.idxCurrent].Document;
if (document == document2)
{
int primaryLocation = this.GetPrimaryLocation();
int secondaryLocation = navigator.GetPrimaryLocation();
if (primaryLocation == secondaryLocation)
{
primaryLocation = this.GetSecondaryLocation();
secondaryLocation = navigator.GetSecondaryLocation();
if (primaryLocation == secondaryLocation)
{
return(XmlNodeOrder.Same);
}
}
if (primaryLocation >= secondaryLocation)
{
return(XmlNodeOrder.After);
}
return(XmlNodeOrder.Before);
}
}
return(XmlNodeOrder.Unknown);
}
/// <summary>
/// Create a new iterator that is a copy of "iter".
/// </summary>
public XPathDocumentElementDescendantIterator(XPathDocumentElementDescendantIterator iter) : base(iter)
{
this.end = iter.end;
this.localName = iter.localName;
this.namespaceUri = iter.namespaceUri;
this.matchSelf = iter.matchSelf;
}
/// <summary>
/// Create an iterator that ranges over all element children of "parent" having the specified QName.
/// </summary>
public XPathDocumentElementChildIterator(XPathDocumentNavigator parent, string name, string namespaceURI) : base(parent)
{
ArgumentNullException.ThrowIfNull(namespaceURI);
_localName = parent.NameTable.Get(name);
_namespaceUri = namespaceURI;
}
/// <summary>
/// Create a new iterator that is a copy of "iter".
/// </summary>
public XPathDocumentElementDescendantIterator(XPathDocumentElementDescendantIterator iter) : base(iter)
{
_end = iter._end;
_localName = iter._localName;
_namespaceUri = iter._namespaceUri;
_matchSelf = iter._matchSelf;
}
public XPathDocumentElementChildIterator(XPathDocumentNavigator parent, string name, string namespaceURI) : base(parent)
{
if (namespaceURI == null)
{
throw new ArgumentNullException("namespaceURI");
}
this.localName = parent.NameTable.Get(name);
this.namespaceUri = namespaceURI;
}
public override bool IsSamePosition(XPathNavigator other)
{
XPathDocumentNavigator navigator = other as XPathDocumentNavigator;
if (navigator == null)
{
return(false);
}
return((((this.idxCurrent == navigator.idxCurrent) && (this.pageCurrent == navigator.pageCurrent)) && (this.idxParent == navigator.idxParent)) && (this.pageParent == navigator.pageParent));
}
public XPathDocumentKindDescendantIterator(XPathDocumentNavigator root, XPathNodeType typ, bool matchSelf) : base(root)
{
this.typ = typ;
this.matchSelf = matchSelf;
if (root.NodeType != XPathNodeType.Root)
{
this.end = new XPathDocumentNavigator(root);
this.end.MoveToNonDescendant();
}
}
/// <summary>
/// Returns true if this navigator is positioned to the same node as the "other" navigator. Returns false
/// if not, or if the "other" navigator is not the same type as this navigator.
/// </summary>
public override bool IsSamePosition(XPathNavigator other)
{
XPathDocumentNavigator that = other as XPathDocumentNavigator;
if (that != null)
{
return _idxCurrent == that._idxCurrent && _pageCurrent == that._pageCurrent &&
_idxParent == that._idxParent && _pageParent == that._pageParent;
}
return false;
}
/// <summary>
/// Returns true if this navigator is positioned to the same node as the "other" navigator. Returns false
/// if not, or if the "other" navigator is not the same type as this navigator.
/// </summary>
public override bool IsSamePosition(XPathNavigator other)
{
XPathDocumentNavigator that = other as XPathDocumentNavigator;
if (that != null)
{
return(this.idxCurrent == that.idxCurrent && this.pageCurrent == that.pageCurrent &&
this.idxParent == that.idxParent && this.pageParent == that.pageParent);
}
return(false);
}
/// <summary>
/// Create an iterator that ranges over all content descendants of "root" having the specified XPathNodeType.
/// </summary>
public XPathDocumentKindDescendantIterator(XPathDocumentNavigator root, XPathNodeType typ, bool matchSelf) : base(root)
{
this.typ = typ;
this.matchSelf = matchSelf;
// Find the next non-descendant node that follows "root" in document order
if (root.NodeType != XPathNodeType.Root)
{
this.end = new XPathDocumentNavigator(root);
this.end.MoveToNonDescendant();
}
}
/// <summary>
/// Position this navigator to the same position as the "other" navigator. If the "other" navigator
/// is not of the same type as this navigator, then return false.
/// </summary>
public override bool MoveTo(XPathNavigator other)
{
XPathDocumentNavigator that = other as XPathDocumentNavigator;
if (that != null)
{
_pageCurrent = that._pageCurrent;
_idxCurrent = that._idxCurrent;
_pageParent = that._pageParent;
_idxParent = that._idxParent;
return true;
}
return false;
}
/// <summary>
/// Position this navigator to the same position as the "other" navigator. If the "other" navigator
/// is not of the same type as this navigator, then return false.
/// </summary>
public override bool MoveTo(XPathNavigator other)
{
XPathDocumentNavigator that = other as XPathDocumentNavigator;
if (that != null)
{
this.pageCurrent = that.pageCurrent;
this.idxCurrent = that.idxCurrent;
this.pageParent = that.pageParent;
this.idxParent = that.idxParent;
return(true);
}
return(false);
}
/// <summary>
/// Create an iterator that ranges over all element descendants of "root" having the specified QName.
/// </summary>
public XPathDocumentElementDescendantIterator(XPathDocumentNavigator root, string name, string namespaceURI, bool matchSelf) : base(root)
{
ArgumentNullException.ThrowIfNull(namespaceURI);
_localName = root.NameTable.Get(name);
_namespaceUri = namespaceURI;
_matchSelf = matchSelf;
// Find the next non-descendant node that follows "root" in document order
if (root.NodeType != XPathNodeType.Root)
{
_end = new XPathDocumentNavigator(root);
_end.MoveToNonDescendant();
}
}
public XPathDocumentElementDescendantIterator(XPathDocumentNavigator root, string name, string namespaceURI, bool matchSelf) : base(root)
{
if (namespaceURI == null)
{
throw new ArgumentNullException("namespaceURI");
}
this.localName = root.NameTable.Get(name);
this.namespaceUri = namespaceURI;
this.matchSelf = matchSelf;
if (root.NodeType != XPathNodeType.Root)
{
this.end = new XPathDocumentNavigator(root);
this.end.MoveToNonDescendant();
}
}
private int GetFollowingEnd(XPathDocumentNavigator end, bool useParentOfVirtual, out XPathNode[] pageEnd)
{
if ((end != null) && (this.pageCurrent[this.idxCurrent].Document == end.pageCurrent[end.idxCurrent].Document))
{
if (end.idxParent == 0)
{
pageEnd = end.pageCurrent;
return(end.idxCurrent);
}
pageEnd = end.pageParent;
if (!useParentOfVirtual)
{
return(end.idxParent + 1);
}
return(end.idxParent);
}
pageEnd = null;
return(0);
}
/// <summary>
/// "end" is positioned on a node which terminates a following scan. Return the page and index of "end" if it
/// is positioned to a non-virtual node. If "end" is positioned to a virtual node:
/// 1. If useParentOfVirtual is true, then return the page and index of the virtual node's parent
/// 2. If useParentOfVirtual is false, then return the page and index of the virtual node's parent + 1.
/// </summary>
private int GetFollowingEnd(XPathDocumentNavigator end, bool useParentOfVirtual, out XPathNode[] pageEnd)
{
// If ending navigator is positioned to a node in another document, then return null
if (end != null && _pageCurrent[_idxCurrent].Document == end._pageCurrent[end._idxCurrent].Document)
{
// If the ending navigator is not positioned on a virtual node, then return its current node
if (end._idxParent == 0)
{
pageEnd = end._pageCurrent;
return(end._idxCurrent);
}
// If the ending navigator is positioned on an attribute, namespace, or virtual text node, then use the
// next physical node instead, as the results will be the same.
pageEnd = end._pageParent;
return((useParentOfVirtual) ? end._idxParent : end._idxParent + 1);
}
// No following, so set pageEnd to null and return an index of 0
pageEnd = null;
return(0);
}
/// <summary> /// Create an iterator that ranges over all element children of "parent" having the specified QName. /// </summary> public XPathDocumentElementChildIterator(XPathDocumentNavigator parent, string name, string namespaceURI !!) : base(parent)
/// <summary>
/// Create a new iterator that is a copy of "iter".
/// </summary>
protected XPathDocumentBaseIterator(XPathDocumentBaseIterator iter)
{
this.ctxt = new XPathDocumentNavigator(iter.ctxt);
this.pos = iter.pos;
}
/// <summary>
/// Create a new iterator that is initially positioned on the "ctxt" node.
/// </summary>
protected XPathDocumentBaseIterator(XPathDocumentNavigator ctxt)
{
this.ctxt = new XPathDocumentNavigator(ctxt);
}
/// <summary>
/// Create a new iterator that is a copy of "iter".
/// </summary>
public XPathDocumentKindDescendantIterator(XPathDocumentKindDescendantIterator iter) : base(iter)
{
this.end = iter.end;
this.typ = iter.typ;
this.matchSelf = iter.matchSelf;
}
/// <summary>
/// Create a new iterator that is a copy of "iter".
/// </summary>
public XPathDocumentKindDescendantIterator(XPathDocumentKindDescendantIterator iter) : base(iter)
{
_end = iter._end;
_typ = iter._typ;
_matchSelf = iter._matchSelf;
}
public override bool MoveToFollowing(XPathNodeType type, XPathNavigator end)
{
XPathNode[] nodeArray2;
int num2;
XPathDocumentNavigator navigator = end as XPathDocumentNavigator;
if ((type == XPathNodeType.Text) || (type == XPathNodeType.All))
{
if (this.pageCurrent[this.idxCurrent].HasCollapsedText)
{
if (((navigator != null) && (this.idxCurrent == navigator.idxParent)) && (this.pageCurrent == navigator.pageParent))
{
return(false);
}
this.pageParent = this.pageCurrent;
this.idxParent = this.idxCurrent;
this.idxCurrent = this.pageCurrent[this.idxCurrent].Document.GetCollapsedTextNode(out this.pageCurrent);
return(true);
}
if (type == XPathNodeType.Text)
{
XPathNode[] pageParent;
int idxParent;
num2 = this.GetFollowingEnd(navigator, true, out nodeArray2);
if (this.idxParent != 0)
{
pageParent = this.pageParent;
idxParent = this.idxParent;
}
else
{
pageParent = this.pageCurrent;
idxParent = this.idxCurrent;
}
if (((navigator != null) && (navigator.idxParent != 0)) && ((idxParent == num2) && (pageParent == nodeArray2)))
{
return(false);
}
if (!XPathNodeHelper.GetTextFollowing(ref pageParent, ref idxParent, nodeArray2, num2))
{
return(false);
}
if (pageParent[idxParent].NodeType == XPathNodeType.Element)
{
this.idxCurrent = pageParent[idxParent].Document.GetCollapsedTextNode(out this.pageCurrent);
this.pageParent = pageParent;
this.idxParent = idxParent;
}
else
{
this.pageCurrent = pageParent;
this.idxCurrent = idxParent;
this.pageParent = null;
this.idxParent = 0;
}
return(true);
}
}
num2 = this.GetFollowingEnd(navigator, false, out nodeArray2);
if (this.idxParent == 0)
{
return(XPathNodeHelper.GetContentFollowing(ref this.pageCurrent, ref this.idxCurrent, nodeArray2, num2, type));
}
if (!XPathNodeHelper.GetContentFollowing(ref this.pageParent, ref this.idxParent, nodeArray2, num2, type))
{
return(false);
}
this.pageCurrent = this.pageParent;
this.idxCurrent = this.idxParent;
this.pageParent = null;
this.idxParent = 0;
return(true);
}
/// <summary>
/// Create an iterator that ranges over all content children of "parent" having the specified XPathNodeType.
/// </summary>
public XPathDocumentKindChildIterator(XPathDocumentNavigator parent, XPathNodeType typ) : base(parent)
{
this.typ = typ;
}
public XPathDocumentNavigator(XPathDocumentNavigator nav) : this(nav._pageCurrent, nav._idxCurrent, nav._pageParent, nav._idxParent)
{
_atomizedLocalName = nav._atomizedLocalName;
}
/// <summary>
/// Move to the next node that:
/// 1. Follows the current node in document order (includes descendants, unlike XPath following axis)
/// 2. Precedes "end" in document order (if end is null, then all following nodes in the document are considered)
/// 3. Has the specified XPathNodeType
/// Return false if the current node has no matching following nodes.
/// </summary>
public override bool MoveToFollowing(XPathNodeType type, XPathNavigator end)
{
XPathDocumentNavigator endTiny = end as XPathDocumentNavigator;
XPathNode[] page, pageEnd;
int idx, idxEnd;
// If searching for text, make sure to handle collapsed text nodes correctly
if (type == XPathNodeType.Text || type == XPathNodeType.All)
{
if (_pageCurrent[_idxCurrent].HasCollapsedText)
{
// Positioned on an element with collapsed text, so return the virtual text node, assuming it's before "end"
if (endTiny != null && _idxCurrent == endTiny._idxParent && _pageCurrent == endTiny._pageParent)
{
// "end" is positioned to a virtual attribute, namespace, or text node
return(false);
}
_pageParent = _pageCurrent;
_idxParent = _idxCurrent;
_idxCurrent = _pageCurrent[_idxCurrent].Document.GetCollapsedTextNode(out _pageCurrent);
return(true);
}
if (type == XPathNodeType.Text)
{
// Get node on which scan ends (null if rest of document should be scanned, parent if positioned on virtual node)
idxEnd = GetFollowingEnd(endTiny, true, out pageEnd);
// If this navigator is positioned on a virtual node, then compute following of parent
if (_idxParent != 0)
{
page = _pageParent;
idx = _idxParent;
}
else
{
page = _pageCurrent;
idx = _idxCurrent;
}
// If ending node is a virtual node, and current node is its parent, then we're done
if (endTiny != null && endTiny._idxParent != 0 && idx == idxEnd && page == pageEnd)
{
return(false);
}
// Get all virtual (collapsed) and physical text nodes which follow the current node
if (!XPathNodeHelper.GetTextFollowing(ref page, ref idx, pageEnd, idxEnd))
{
return(false);
}
if (page[idx].NodeType == XPathNodeType.Element)
{
// Virtualize collapsed text nodes
Debug.Assert(page[idx].HasCollapsedText);
_idxCurrent = page[idx].Document.GetCollapsedTextNode(out _pageCurrent);
_pageParent = page;
_idxParent = idx;
}
else
{
// Physical text node
Debug.Assert(page[idx].IsText);
_pageCurrent = page;
_idxCurrent = idx;
_pageParent = null;
_idxParent = 0;
}
return(true);
}
}
// Get node on which scan ends (null if rest of document should be scanned, parent + 1 if positioned on virtual node)
idxEnd = GetFollowingEnd(endTiny, false, out pageEnd);
// If this navigator is positioned on a virtual node, then compute following of parent
if (_idxParent != 0)
{
if (!XPathNodeHelper.GetContentFollowing(ref _pageParent, ref _idxParent, pageEnd, idxEnd, type))
{
return(false);
}
_pageCurrent = _pageParent;
_idxCurrent = _idxParent;
_pageParent = null;
_idxParent = 0;
return(true);
}
return(XPathNodeHelper.GetContentFollowing(ref _pageCurrent, ref _idxCurrent, pageEnd, idxEnd, type));
}
