//
// XmlNamespaceManager.cs
//
-// Author:
+// Authors:
// Jason Diamond (jason@injektilo.org)
+// Ben Maurer (bmaurer@users.sourceforge.net)
+// Atsushi Enomoto (atsushi@ximian.com)
//
// (C) 2001 Jason Diamond http://injektilo.org/
+// (C) 2003 Ben Maurer
+// (C) 2004 Novell Inc.
+//
+
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Collections;
+#if NET_2_0
+using System.Collections.Generic;
+#endif
+using System.Collections.Specialized;
namespace System.Xml
{
- public class XmlNamespaceManager : IEnumerable
+ public class XmlNamespaceManager : IXmlNamespaceResolver, IEnumerable
{
+ #region Data
+ struct NsDecl {
+ public string Prefix, Uri;
+ }
+
+ struct NsScope {
+ public int DeclCount;
+ public string DefaultNamespace;
+ }
+
+ NsDecl [] decls;
+ int declPos = -1;
+
+ NsScope [] scopes;
+ int scopePos = -1;
+
+ string defaultNamespace;
+ int count;
+
+ void InitData ()
+ {
+ decls = new NsDecl [10];
+ scopes = new NsScope [40];
+ }
+
+ // precondition declPos == nsDecl.Length
+ void GrowDecls ()
+ {
+ NsDecl [] old = decls;
+ decls = new NsDecl [declPos * 2 + 1];
+ if (declPos > 0)
+ Array.Copy (old, 0, decls, 0, declPos);
+ }
+
+ // precondition scopePos == scopes.Length
+ void GrowScopes ()
+ {
+ NsScope [] old = scopes;
+ scopes = new NsScope [scopePos * 2 + 1];
+ if (scopePos > 0)
+ Array.Copy (old, 0, scopes, 0, scopePos);
+ }
+
+ #endregion
+
#region Fields
private XmlNameTable nameTable;
- private NamespaceScope currentScope;
+ internal const string XmlnsXml = "http://www.w3.org/XML/1998/namespace";
+ internal const string XmlnsXmlns = "http://www.w3.org/2000/xmlns/";
+ internal const string PrefixXml = "xml";
+ internal const string PrefixXmlns = "xmlns";
#endregion
{
this.nameTable = nameTable;
- nameTable.Add ("xmlns");
- nameTable.Add ("xml");
+ nameTable.Add (PrefixXmlns);
+ nameTable.Add (PrefixXml);
nameTable.Add (String.Empty);
- nameTable.Add ("http://www.w3.org/2000/xmlns/");
- nameTable.Add ("http://www.w3.org/XML/1998/namespace");
-
- PushScope ();
- currentScope.Namespaces = new Hashtable ();
- currentScope.Namespaces.Add ("xml", "http://www.w3.org/XML/1998/namespace");
- currentScope.Namespaces.Add ("xmlns", "http://www.w3.org/2000/xmlns/");
+ nameTable.Add (XmlnsXmlns);
+ nameTable.Add (XmlnsXml);
+
+ InitData ();
}
#endregion
#region Properties
public virtual string DefaultNamespace {
- get { return LookupNamespace (String.Empty); }
+ get { return defaultNamespace == null ? string.Empty : defaultNamespace; }
}
+#if NET_2_0
+ public virtual XmlNameTable NameTable {
+#else
public XmlNameTable NameTable {
+#endif
get { return nameTable; }
}
#region Methods
public virtual void AddNamespace (string prefix, string uri)
+ {
+ AddNamespace (prefix, uri, false);
+ }
+
+ internal virtual void AddNamespace (string prefix, string uri, bool atomizedNames)
{
if (prefix == null)
throw new ArgumentNullException ("prefix", "Value cannot be null.");
if (uri == null)
throw new ArgumentNullException ("uri", "Value cannot be null.");
+ if (!atomizedNames) {
+ prefix = nameTable.Add (prefix);
+ uri = nameTable.Add (uri);
+ }
- if (prefix.Length > 2 && prefix.Substring (0, 3).ToLower () == "xml")
- throw new ArgumentException ( "Prefixes beginning with \"xml\" (regardless " + "of whether the characters are uppercase, lowercase, or some combination thereof) are reserved for use by XML.", "prefix");
+ IsValidDeclaration (prefix, uri, true);
- if (currentScope.Namespaces == null)
- currentScope.Namespaces = new Hashtable ();
+ if (prefix.Length == 0)
+ defaultNamespace = uri;
+
+ for (int i = declPos; i > declPos - count; i--) {
+ if (object.ReferenceEquals (decls [i].Prefix, prefix)) {
+ decls [i].Uri = uri;
+ return;
+ }
+ }
+
+ declPos ++;
+ count ++;
+
+ if (declPos == decls.Length)
+ GrowDecls ();
+ decls [declPos].Prefix = prefix;
+ decls [declPos].Uri = uri;
+ }
- if (prefix != String.Empty)
- nameTable.Add (prefix);
- currentScope.Namespaces [prefix] = nameTable.Add (uri);
+ static string IsValidDeclaration (string prefix, string uri, bool throwException)
+ {
+ string message = null;
+ // It is funky, but it does not check whether prefix
+ // is equivalent to "xml" in case-insensitive means.
+ if (prefix == PrefixXml && uri != XmlnsXml)
+ message = String.Format ("Prefix \"xml\" can only be bound to the fixed namespace URI \"{0}\". \"{1}\" is invalid.", XmlnsXml, uri);
+ else if (message == null && prefix == "xmlns")
+ message = "Declaring prefix named \"xmlns\" is not allowed to any namespace.";
+ else if (message == null && uri == XmlnsXmlns)
+ message = String.Format ("Namespace URI \"{0}\" cannot be declared with any namespace.", XmlnsXmlns);
+ if (message != null && throwException)
+ throw new ArgumentException (message);
+ else
+ return message;
}
public virtual IEnumerator GetEnumerator ()
{
- if (currentScope.Namespaces == null)
- currentScope.Namespaces = new Hashtable ();
+ // In fact it returns such table's enumerator that contains all the namespaces.
+ // while HasNamespace() ignores pushed namespaces.
+
+ Hashtable ht = new Hashtable ();
+ for (int i = 0; i <= declPos; i++) {
+ if (decls [i].Prefix != string.Empty && decls [i].Uri != null) {
+ ht [decls [i].Prefix] = decls [i].Uri;
+ }
+ }
+
+ ht [string.Empty] = DefaultNamespace;
+ ht [PrefixXml] = XmlnsXml;
+ ht [PrefixXmlns] = XmlnsXmlns;
+
+ return ht.Keys.GetEnumerator ();
+ }
+
+#if NET_2_0
+ public virtual IDictionary<string, string> GetNamespacesInScope (XmlNamespaceScope scope)
+ {
+ IDictionary namespaceTable = GetNamespacesInScopeImpl (scope);
+ IDictionary<string, string> namespaces = new Dictionary<string, string>(namespaceTable.Count);
- return currentScope.Namespaces.Keys.GetEnumerator ();
+ foreach (DictionaryEntry entry in namespaceTable) {
+ namespaces[(string) entry.Key] = (string) entry.Value;
+ }
+ return namespaces;
+ }
+#else
+ IDictionary IXmlNamespaceResolver.GetNamespacesInScope (XmlNamespaceScope scope)
+ {
+ return GetNamespacesInScopeImpl (scope);
+ }
+#endif
+
+ internal virtual IDictionary GetNamespacesInScopeImpl (XmlNamespaceScope scope)
+ {
+ Hashtable table = new Hashtable ();
+
+ if (scope == XmlNamespaceScope.Local) {
+ for (int i = 0; i < count; i++)
+ if (decls [declPos - i].Prefix == String.Empty && decls [declPos - i].Uri == String.Empty) {
+ if (table.Contains (String.Empty))
+ table.Remove (String.Empty);
+ }
+ else if (decls [declPos - i].Uri != null)
+ table.Add (decls [declPos - i].Prefix, decls [declPos - i].Uri);
+ return table;
+ } else {
+ for (int i = 0; i <= declPos; i++) {
+ if (decls [i].Prefix == String.Empty && decls [i].Uri == String.Empty) {
+ // removal of default namespace
+ if (table.Contains (String.Empty))
+ table.Remove (String.Empty);
+ }
+ else if (decls [i].Uri != null)
+ table [decls [i].Prefix] = decls [i].Uri;
+ }
+
+ if (scope == XmlNamespaceScope.All)
+ table.Add ("xml", XmlNamespaceManager.XmlnsXml);
+ return table;
+ }
}
public virtual bool HasNamespace (string prefix)
{
- return currentScope != null && currentScope.Namespaces != null && currentScope.Namespaces.Contains (prefix);
+ return HasNamespace (prefix, false);
}
- public virtual string LookupNamespace (string prefix)
+ internal virtual bool HasNamespace (string prefix, bool atomizedNames)
{
- NamespaceScope scope = currentScope;
+ if (prefix == null || count == 0)
+ return false;
- while (scope != null) {
- if (scope.Namespaces != null && scope.Namespaces.Contains (prefix))
- return scope.Namespaces[prefix] as string;
- scope = scope.Next;
+ for (int i = declPos; i > declPos - count; i--) {
+ if (decls [i].Prefix == prefix)
+ return true;
}
+
+ return false;
+ }
+
+ public virtual string LookupNamespace (string prefix)
+ {
+#if NET_2_0
+ return LookupNamespace (prefix, false);
+#else
+ return LookupNamespace (prefix, true);
+#endif
+ }
+ internal virtual string LookupNamespace (string prefix, bool atomizedNames)
+ {
switch (prefix) {
- case "xmlns":
- return nameTable.Get ("http://www.w3.org/2000/xmlns/");
- case "xml":
- return nameTable.Get ("http://www.w3.org/XML/1998/namespace");
+ case PrefixXmlns:
+ return nameTable.Get (XmlnsXmlns);
+ case PrefixXml:
+ return nameTable.Get (XmlnsXml);
case "":
- return nameTable.Get (String.Empty);
+ return DefaultNamespace;
+ case null:
+ return null;
}
+ for (int i = declPos; i >= 0; i--) {
+ if (CompareString (decls [i].Prefix, prefix, atomizedNames) && decls [i].Uri != null /* null == flag for removed */)
+ return decls [i].Uri;
+ }
+
return null;
}
public virtual string LookupPrefix (string uri)
{
+#if NET_2_0
+ return LookupPrefix (uri, false);
+#else
+ return LookupPrefix (uri, true);
+#endif
+ }
+
+ private bool CompareString (string s1, string s2, bool atomizedNames)
+ {
+ if (atomizedNames)
+ return object.ReferenceEquals (s1, s2);
+ else
+ return s1 == s2;
+ }
+
+ internal string LookupPrefix (string uri, bool atomizedName)
+ {
+ return LookupPrefixCore (uri, atomizedName, false);
+ }
+
+ internal string LookupPrefixExclusive (string uri, bool atomizedName)
+ {
+ return LookupPrefixCore (uri, atomizedName, true);
+ }
+
+ string LookupPrefixCore (string uri, bool atomizedName, bool excludeOverriden)
+ {
if (uri == null)
return null;
- NamespaceScope scope = currentScope;
+ if (CompareString (uri, DefaultNamespace, atomizedName))
+ return string.Empty;
- while (scope != null)
- {
- if (scope.Namespaces != null && scope.Namespaces.ContainsValue (uri)) {
- foreach (DictionaryEntry entry in scope.Namespaces) {
- if (entry.Value.ToString() == uri)
- return nameTable.Get (entry.Key as string) as string;
- }
- }
+ if (CompareString (uri, XmlnsXml, atomizedName))
+ return PrefixXml;
+
+ if (CompareString (uri, XmlnsXmlns, atomizedName))
+ return PrefixXmlns;
- scope = scope.Next;
+ for (int i = declPos; i >= 0; i--) {
+ if (CompareString (decls [i].Uri, uri, atomizedName) && decls [i].Prefix.Length > 0) // we already looked for ""
+ if (!excludeOverriden || !IsOverriden (i))
+ return decls [i].Prefix;
}
// ECMA specifies that this method returns String.Empty
return null;
}
- public virtual bool PopScope ()
+ bool IsOverriden (int idx)
{
- if (currentScope != null)
- currentScope = currentScope.Next;
+ if (idx == declPos)
+ return false;
+ string prefix = decls [idx + 1].Prefix;
+ for (int i = idx + 1; i <= declPos; i++)
+ if ((object) decls [idx].Prefix == prefix)
+ return true;
+ return false;
+ }
- return currentScope != null;
+ public virtual bool PopScope ()
+ {
+ if (scopePos == -1)
+ return false;
+
+ declPos -= count;
+ defaultNamespace = scopes [scopePos].DefaultNamespace;
+ count = scopes [scopePos].DeclCount;
+ scopePos --;
+ return true;
}
public virtual void PushScope ()
{
- NamespaceScope newScope = new NamespaceScope ();
- newScope.Next = currentScope;
- currentScope = newScope;
+ scopePos ++;
+ if (scopePos == scopes.Length)
+ GrowScopes ();
+
+ scopes [scopePos].DefaultNamespace = defaultNamespace;
+ scopes [scopePos].DeclCount = count;
+ count = 0;
}
+ // It is rarely used, so we don't need NameTable optimization on it.
public virtual void RemoveNamespace (string prefix, string uri)
+ {
+ RemoveNamespace (prefix, uri, false);
+ }
+
+ internal virtual void RemoveNamespace (string prefix, string uri, bool atomizedNames)
{
if (prefix == null)
throw new ArgumentNullException ("prefix");
if (uri == null)
throw new ArgumentNullException ("uri");
-
- if (currentScope == null || currentScope.Namespaces == null)
- return;
-
- string p = nameTable.Get (prefix);
- string u = nameTable.Get (uri);
- if (p == null || u == null)
- return;
-
- string storedUri = currentScope.Namespaces [p] as string;
- if (storedUri == null || storedUri != u)
+
+ if (count == 0)
return;
- currentScope.Namespaces.Remove (p);
+ for (int i = declPos; i > declPos - count; i--) {
+ if (CompareString (decls [i].Prefix, prefix, atomizedNames) && CompareString (decls [i].Uri, uri, atomizedNames))
+ decls [i].Uri = null;
+ }
}
#endregion
}
-
- internal class NamespaceScope
- {
- internal NamespaceScope Next;
- internal Hashtable Namespaces;
- }
}
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