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//------------------------------------------------------------------------------
// <copyright file="XmlNamedNodeMap.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
//------------------------------------------------------------------------------
namespace System.Xml {
using System.Collections;
// Represents a collection of nodes that can be accessed by name or index.
public partial class XmlNamedNodeMap : IEnumerable {
internal XmlNode parent;
internal SmallXmlNodeList nodes;
internal XmlNamedNodeMap(XmlNode parent)
{
this.parent = parent;
}
// Retrieves a XmlNode specified by name.
public virtual XmlNode GetNamedItem(String name) {
int offset = FindNodeOffset(name);
if (offset >= 0)
return (XmlNode)nodes[offset];
return null;
}
// Adds a XmlNode using its Name property
public virtual XmlNode SetNamedItem(XmlNode node) {
if ( node == null )
return null;
int offset = FindNodeOffset( node.LocalName, node.NamespaceURI );
if (offset == -1) {
AddNode( node );
return null;
}
else {
return ReplaceNodeAt( offset, node );
}
}
// Removes the node specified by name.
public virtual XmlNode RemoveNamedItem(String name) {
int offset = FindNodeOffset(name);
if (offset >= 0) {
return RemoveNodeAt( offset );
}
return null;
}
// Gets the number of nodes in this XmlNamedNodeMap.
public virtual int Count {
get {
return nodes.Count;
}
}
// Retrieves the node at the specified index in this XmlNamedNodeMap.
public virtual XmlNode Item(int index) {
if (index < 0 || index >= nodes.Count)
return null;
try {
return (XmlNode)nodes[index];
} catch ( ArgumentOutOfRangeException ) {
throw new IndexOutOfRangeException(Res.GetString(Res.Xdom_IndexOutOfRange));
}
}
//
// DOM Level 2
//
// Retrieves a node specified by LocalName and NamespaceURI.
public virtual XmlNode GetNamedItem(String localName, String namespaceURI) {
int offset = FindNodeOffset( localName, namespaceURI );
if (offset >= 0)
return (XmlNode)nodes[offset];
return null;
}
// Removes a node specified by local name and namespace URI.
public virtual XmlNode RemoveNamedItem(String localName, String namespaceURI) {
int offset = FindNodeOffset( localName, namespaceURI );
if (offset >= 0) {
return RemoveNodeAt( offset );
}
return null;
}
public virtual IEnumerator GetEnumerator() {
return nodes.GetEnumerator();
}
internal int FindNodeOffset( string name ) {
int c = this.Count;
for (int i = 0; i < c; i++) {
XmlNode node = (XmlNode) nodes[i];
if (name == node.Name)
return i;
}
return -1;
}
internal int FindNodeOffset( string localName, string namespaceURI ) {
int c = this.Count;
for (int i = 0; i < c; i++) {
XmlNode node = (XmlNode) nodes[i];
if (node.LocalName == localName && node.NamespaceURI == namespaceURI)
return i;
}
return -1;
}
internal virtual XmlNode AddNode( XmlNode node ) {
XmlNode oldParent;
if ( node.NodeType == XmlNodeType.Attribute )
oldParent = ((XmlAttribute)node).OwnerElement;
else
oldParent = node.ParentNode;
string nodeValue = node.Value;
XmlNodeChangedEventArgs args = parent.GetEventArgs( node, oldParent, parent, nodeValue, nodeValue, XmlNodeChangedAction.Insert );
if (args != null)
parent.BeforeEvent( args );
nodes.Add( node );
node.SetParent( parent );
if (args != null)
parent.AfterEvent( args );
return node;
}
internal virtual XmlNode AddNodeForLoad(XmlNode node, XmlDocument doc) {
XmlNodeChangedEventArgs args = doc.GetInsertEventArgsForLoad(node, parent);
if (args != null) {
doc.BeforeEvent(args);
}
nodes.Add(node);
node.SetParent(parent);
if (args != null) {
doc.AfterEvent(args);
}
return node;
}
internal virtual XmlNode RemoveNodeAt( int i ) {
XmlNode oldNode = (XmlNode)nodes[i];
string oldNodeValue = oldNode.Value;
XmlNodeChangedEventArgs args = parent.GetEventArgs( oldNode, parent, null, oldNodeValue, oldNodeValue, XmlNodeChangedAction.Remove );
if (args != null)
parent.BeforeEvent( args );
nodes.RemoveAt(i);
oldNode.SetParent( null );
if (args != null)
parent.AfterEvent( args );
return oldNode;
}
internal XmlNode ReplaceNodeAt( int i, XmlNode node ) {
XmlNode oldNode = RemoveNodeAt( i );
InsertNodeAt( i, node );
return oldNode;
}
internal virtual XmlNode InsertNodeAt( int i, XmlNode node ) {
XmlNode oldParent;
if ( node.NodeType == XmlNodeType.Attribute )
oldParent = ((XmlAttribute)node).OwnerElement;
else
oldParent = node.ParentNode;
string nodeValue = node.Value;
XmlNodeChangedEventArgs args = parent.GetEventArgs( node, oldParent, parent, nodeValue, nodeValue, XmlNodeChangedAction.Insert );
if (args != null)
parent.BeforeEvent( args );
nodes.Insert( i, node );
node.SetParent( parent );
if (args != null)
parent.AfterEvent( args );
return node;
}
}
}
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