// Element Nodes
// If the element is not in the node-set, then the result is obtained
// by processing the namespace axis, then the attribute axis, then
// processing the child nodes of the element that are in the node-set
// (in document order). If the element is inthe node-set, then the result
// is an open angle bracket (<), the element QName, the result of
// processing the namespace axis, the result of processing the attribute
// axis, a close angle bracket (>), the result of processing the child
// nodes of the element that are in the node-set (in document order), an
// open angle bracket, a forward slash (/), the element QName, and a close
// angle bracket.
private void WriteElementNode(XmlNode node, bool visible)
{
// Console.WriteLine ("Debug: element node");
// remember current state
int savedPrevVisibleNamespacesStart = prevVisibleNamespacesStart;
int savedPrevVisibleNamespacesEnd = prevVisibleNamespacesEnd;
int savedVisibleNamespacesSize = visibleNamespaces.Count;
XmlCanonicalizerState s = state;
if (visible && state == XmlCanonicalizerState.BeforeDocElement)
{
state = XmlCanonicalizerState.InsideDocElement;
}
// write start tag
if (visible)
{
res.Append("<");
res.Append(node.Name);
}
// this is odd but you can select namespaces
// and attributes even if node itself is not visible
WriteNamespacesAxis(node, visible);
WriteAttributesAxis(node);
if (visible)
{
res.Append(">");
}
// write children
for (XmlNode child = node.FirstChild; child != null; child = child.NextSibling)
{
WriteNode(child);
}
// write end tag
if (visible)
{
res.Append("</");
res.Append(node.Name);
res.Append(">");
}
// restore state
if (visible && s == XmlCanonicalizerState.BeforeDocElement)
{
state = XmlCanonicalizerState.AfterDocElement;
}
prevVisibleNamespacesStart = savedPrevVisibleNamespacesStart;
prevVisibleNamespacesEnd = savedPrevVisibleNamespacesEnd;
if (visibleNamespaces.Count > savedVisibleNamespacesSize)
{
visibleNamespaces.RemoveRange(savedVisibleNamespacesSize,
visibleNamespaces.Count - savedVisibleNamespacesSize);
}
}
void Initialize()
{
state = XmlCanonicalizerState.BeforeDocElement;
visibleNamespaces = new ArrayList();
prevVisibleNamespacesStart = 0;
prevVisibleNamespacesEnd = 0;
res.Length = 0;
}
void Initialize ()
{
state = XmlCanonicalizerState.BeforeDocElement;
visibleNamespaces = new ArrayList ();
prevVisibleNamespacesStart = 0;
prevVisibleNamespacesEnd = 0;
res.Length = 0;
}
private void WriteDocumentNode(XmlNode node)
{
state = XmlCanonicalizerState.BeforeDocElement;
for (XmlNode child = node.FirstChild; child != null; child = child.NextSibling)
{
WriteNode(child);
}
}
public XmlCanonicalizer (bool withComments, bool excC14N)
{
res = new StringBuilder ();
comments = withComments;
exclusive = excC14N;
state = XmlCanonicalizerState.BeforeDocElement;
visibleNamespaces = new ArrayList ();
prevVisibleNamespacesStart = 0;
prevVisibleNamespacesEnd = 0;
}
public XmlCanonicalizer(bool withComments, bool excC14N)
{
res = new StringBuilder();
comments = withComments;
exclusive = excC14N;
state = XmlCanonicalizerState.BeforeDocElement;
visibleNamespaces = new ArrayList();
prevVisibleNamespacesStart = 0;
prevVisibleNamespacesEnd = 0;
}
//interface mod
public Stream Canonicalize(XmlNode node)
{
//WriteDocumentNode (doc);
state = XmlCanonicalizerState.BeforeDocElement;
//for (XmlNode child = node.FirstChild; child != null; child = child.NextSibling)
// WriteNode (child);
WriteNode(node);
UTF8Encoding utf8 = new UTF8Encoding();
byte[] data = utf8.GetBytes(res.ToString());
return(new MemoryStream(data));
}
// Element Nodes
// If the element is not in the node-set, then the result is obtained
// by processing the namespace axis, then the attribute axis, then
// processing the child nodes of the element that are in the node-set
// (in document order). If the element is inthe node-set, then the result
// is an open angle bracket (<), the element QName, the result of
// processing the namespace axis, the result of processing the attribute
// axis, a close angle bracket (>), the result of processing the child
// nodes of the element that are in the node-set (in document order), an
// open angle bracket, a forward slash (/), the element QName, and a close
// angle bracket.
private void WriteElementNode (XmlNode node, bool visible)
{
// Console.WriteLine ("Debug: element node");
// remember current state
int savedPrevVisibleNamespacesStart = prevVisibleNamespacesStart;
int savedPrevVisibleNamespacesEnd = prevVisibleNamespacesEnd;
int savedVisibleNamespacesSize = visibleNamespaces.Count;
XmlCanonicalizerState s = state;
if (visible && state == XmlCanonicalizerState.BeforeDocElement)
state = XmlCanonicalizerState.InsideDocElement;
// write start tag
if (visible) {
res.Append ("<");
res.Append (node.Name);
}
// this is odd but you can select namespaces
// and attributes even if node itself is not visible
WriteNamespacesAxis (node, visible);
WriteAttributesAxis (node);
if (visible)
res.Append (">");
// write children
for (XmlNode child = node.FirstChild; child != null; child = child.NextSibling)
WriteNode (child);
// write end tag
if (visible) {
res.Append ("</");
res.Append (node.Name);
res.Append (">");
}
// restore state
if (visible && s == XmlCanonicalizerState.BeforeDocElement)
state = XmlCanonicalizerState.AfterDocElement;
prevVisibleNamespacesStart = savedPrevVisibleNamespacesStart;
prevVisibleNamespacesEnd = savedPrevVisibleNamespacesEnd;
if (visibleNamespaces.Count > savedVisibleNamespacesSize) {
visibleNamespaces.RemoveRange (savedVisibleNamespacesSize,
visibleNamespaces.Count - savedVisibleNamespacesSize);
}
}
private void WriteDocumentNode (XmlNode node)
{
state = XmlCanonicalizerState.BeforeDocElement;
for (XmlNode child = node.FirstChild; child != null; child = child.NextSibling)
WriteNode (child);
}
