/// <include file='doc\XPathDocumentView.uex' path='docs/doc[@for="XPathDocumentView.XPathDocumentView4"]/*' />
public XPathDocumentView(XPathDocument document, string xpath, IXmlNamespaceResolver namespaceResolver, bool showPrefixes) {
if (null == document)
throw new ArgumentNullException("document");
this.xpath = xpath;
this.document = document;
this.ndRoot = document.Root;
if (null == this.ndRoot)
throw new ArgumentException("document");
this.ndRoot = document.Root;
this.xpathResolver = namespaceResolver;
if (showPrefixes)
this.namespaceResolver = namespaceResolver;
ArrayList rows = new ArrayList();
this.rows = rows;
InitFromXPath(this.ndRoot, xpath);
}
/// <include file='doc\XPathDocumentView.uex' path='docs/doc[@for="XPathDocumentView.XPathDocumentView1"]/*' />
public XPathDocumentView(XPathDocument document, IXmlNamespaceResolver namespaceResolver) {
if (null == document)
throw new ArgumentNullException("document");
this.document = document;
this.ndRoot = document.Root;
if (null == this.ndRoot)
throw new ArgumentException("document");
this.namespaceResolver = namespaceResolver;
ArrayList rows = new ArrayList();
this.rows = rows;
Debug.Assert(XPathNodeType.Root == this.ndRoot.NodeType);
XPathNode nd = this.ndRoot.Child;
while (null != nd) {
if (XPathNodeType.Element == nd.NodeType)
rows.Add(nd);
nd = nd.Sibling;
}
DeriveShapeFromRows();
}
public override bool MoveTo( XPathNavigator other ) {
XPathDocumentNavigator nav = other as XPathDocumentNavigator;
if( nav != null ) {
doc = nav.doc;
node = nav.node;
return true;
}
return false;
}
protected IXmlCursor Cursor(XPathNavigator parent, string pathText, CursorFlags flags)
{
var parentNode = new XPathNode(parent, typeof(object), NamespaceSource.Instance);
var compiledPath = XPathCompiler.Compile(pathText);
compiledPath.SetContext(Context);
return Cursor(parentNode, compiledPath, IncludedTypes, flags);
}
internal XPathDocumentView(XPathNode root, ArrayList rows, Shape rowShape) {
this.rows = rows;
this.rowShape = rowShape;
this.ndRoot = root;
}
public bool Next() {
if (null != this.node) {
this.node = TreeNavigationHelper.GetContentSibling(this.node, XPathNodeType.Element);
if (node != null)
Advance();
return null != this.node;
}
return false;
}
public ContentIterator(XPathNode nd, Shape shape) {
this.node = nd;
XmlSchemaElement xse = shape.XmlSchemaElement;
Debug.Assert(null != xse);
SchemaElementDecl decl = xse.ElementDecl;
Debug.Assert(null != decl);
this.contentValidator = decl.ContentValidator;
this.currentState = new ValidationState();
this.contentValidator.InitValidation(this.currentState);
this.currentState.ProcessContents = XmlSchemaContentProcessing.Strict;
if (nd != null)
Advance();
}
//
// XPath support
//
void InitFromXPath(XPathNode ndRoot, string xpath) {
XPathStep[] steps = ParseXPath(xpath, this.xpathResolver);
ArrayList rows = this.rows;
rows.Clear();
PopulateFromXPath(ndRoot, steps, 0);
DeriveShapeFromRows();
}
private XPathDocumentNavigator( XPathDocumentNavigator nav ) {
this.doc = nav.doc;
this.node = nav.node;
this.parentOfNs = nav.parentOfNs;
}
internal XPathDocumentNavigator( XPathDocument doc, XPathNode node ) {
this.doc = doc;
this.node = node;
}
public void RemoveChild( XPathNode node ) {
Debug.Assert( node.ParentNode == this );
XPathNode nodePrev = node.previous;
XPathNode nodeNext = node.next;
if( nodePrev != null ) {
nodePrev.next = nodeNext;
}
if( nodeNext != null ) {
nodeNext.previous = nodePrev;
Debug.Assert( this.lastChild != node, "Node has next. It can't be last child of it's parent." );
}
else {
if( this.lastChild == node ) {
this.lastChild = nodePrev;
}
}
if( this.firstChild == node ) {
this.firstChild = nodeNext;
}
}
public void AppendChild( XPathNode node ) {
if( this.lastChild != null ) {
node.previous = this.lastChild;
this.lastChild.next = node;
this.lastChild = node;
}
else {
this.lastChild = node;
this.firstChild = node;
}
node.parent = this;
}
protected bool Match(XPathNode node, string name, string nsUri) {
Debug.Assert(node != null);
return node.IsElement(name, nsUri);
}
public override bool MoveToId( string id ) {
XPathNode n = doc.GetElementFromId( id );
if ( n != null ) {
node = n;
return true;
}
return false;
}
public override bool MoveToParent() {
if (parentOfNs != null) {
node = parentOfNs; // namespace trick
parentOfNs = null;
return true;
}
else {
XPathNode n = node.ParentNode;
if( n != null ) {
node = n;
return true;
}
}
return false;
}
XPathNodeView FillRow(XPathNode ndRow, Shape shape) {
object[] columns;
XPathNode nd;
switch (shape.BindingType) {
case BindingType.Text:
case BindingType.Attribute:
columns = new object[1];
columns[0] = ndRow;
return new XPathNodeView(this, ndRow, columns);
case BindingType.Repeat:
columns = new object[1];
nd = TreeNavigationHelper.GetContentChild(ndRow);
columns[0] = FillColumn(new ContentIterator(nd, shape), shape);
return new XPathNodeView(this, ndRow, columns);
case BindingType.Sequence:
case BindingType.Choice:
case BindingType.All:
int subShapesCount = shape.SubShapes.Count;
columns = new object[subShapesCount];
if (shape.BindingType == BindingType.Sequence
&& shape.SubShape(0).BindingType == BindingType.Attribute) {
FillAttributes(ndRow, shape, columns);
}
Shape lastSubShape = (Shape)shape.SubShapes[subShapesCount - 1];
if (lastSubShape.BindingType == BindingType.Text) { //Attributes followed by simpe content or mixed content
columns[subShapesCount - 1] = ndRow;
return new XPathNodeView(this, ndRow, columns);
}
else {
nd = TreeNavigationHelper.GetContentChild(ndRow);
return FillSubRow(new ContentIterator(nd, shape), shape, columns);
}
default:
// should not map to a row
#if DEBUG
throw new NotSupportedException("Unable to bind row to: "+shape.BindingType.ToString());
#else
throw new NotSupportedException();
#endif
}
}
public override bool MoveToAttribute( string localName, string namespaceURI ) {
XPathNode n = node.GetAttribute(localName, namespaceURI);
if( n != null ) {
node = n;
return true;
}
return false;
}
void FillAttributes(XPathNode nd, Shape shape, object[] cols) {
int i = 0;
while (i < cols.Length) {
Shape attrShape = shape.SubShape(i);
if (attrShape.BindingType != BindingType.Attribute)
break;
XmlQualifiedName name = attrShape.AttributeName;
XPathNode ndAttr = nd.GetAttribute( name.Name, name.Namespace );
if (null != ndAttr)
cols[i] = ndAttr;
i++;
}
}
public override bool MoveToNextAttribute() {
XPathNode n = node.NextAttributeNode;
if( n != null ) {
node = n;
return true;
}
return false;
}
void PopulateFromXPath(XPathNode nd, XPathStep[] steps, int step) {
string ln = steps[step].name.Name;
string ns = steps[step].name.Namespace;
if (XPathNodeType.Attribute == steps[step].type) {
XPathNode ndAttr = nd.GetAttribute( ln, ns, true);
if (null != ndAttr) {
if (null != ndAttr.SchemaAttribute)
this.rows.Add(ndAttr);
}
}
else {
XPathNode ndChild = TreeNavigationHelper.GetElementChild(nd, ln, ns, true);
if (null != ndChild) {
int nextStep = step+1;
do {
if (steps.Length == nextStep) {
if (null != ndChild.SchemaType)
this.rows.Add(ndChild);
}
else {
PopulateFromXPath(ndChild, steps, nextStep);
}
ndChild = TreeNavigationHelper.GetElementSibling(ndChild, ln, ns, true);
} while (null != ndChild);
}
}
}
public override bool MoveToNamespace(string name) {
XPathNamespace ns = node.GetNamespace(name);
if( ns != null ) {
parentOfNs = node;
node = ns;
return true;
}
return false;
}
public override bool MoveToNextNamespace(XPathNamespaceScope namespaceScope) {
XPathNode n = node.NextNamespaceNode;
if (n != null) {
XPathNode parent = n.parent;
if (parent == null && namespaceScope == XPathNamespaceScope.ExcludeXml) {
return false;
}
if (parent != parentOfNs && namespaceScope == XPathNamespaceScope.Local) {
return false;
}
node = n;
return true;
}
return false;
}
public override bool MoveToPrevious() {
XPathNode n = node.PreviousSiblingNode;
if( n != null ) {
node = n;
return true;
}
return false;
}
private void Advance() {
XPathNode nd = this.node;
int errorCode;
this.currentParticle = this.contentValidator.ValidateElement(new XmlQualifiedName(nd.LocalName, nd.NamespaceUri), this.currentState, out errorCode);
if (null == this.currentParticle || 0 != errorCode) {
this.node = null;
}
}
public override bool MoveToFirst() {
XPathNode n = node.FirstSiblingNode;
if( n != null ) {
node = n;
return true;
}
return false;
}
public void MoveTo_NotARecognizedNode_Fails()
{
var xml = Xml("<X/>");
var cursor = Cursor(xml, "A", CursorFlags.Multiple);
var wrongNode = new XPathNode(Xml("<Q/>"), typeof(object), NamespaceSource.Instance);
Assert.Throws<InvalidOperationException>(() =>
cursor.MoveTo(wrongNode));
}
public override bool MoveToFirstChild() {
XPathNode n = node.FirstChildNode;
if( n != null ) {
//Debug.Assert(n.NodeType != XPathNodeType.Attribute, "Attribute is child");
node = n;
return true;
}
return false;
}
internal XPathNodeView(XPathDocumentView col, XPathNode rowNd, object[] columns) {
this.collection = col;
this.rowNd = rowNd;
this.cols = columns;
}
public override void MoveToRoot() {
parentOfNs = null;
node = doc.root;
}
