2 // XmlNamespaceManager.cs
5 // Jason Diamond (jason@injektilo.org)
6 // Ben Maurer (bmaurer@users.sourceforge.net)
7 // Atsushi Enomoto (atsushi@ximian.com)
9 // (C) 2001 Jason Diamond http://injektilo.org/
10 // (C) 2003 Ben Maurer
11 // (C) 2004 Novell Inc.
15 // Permission is hereby granted, free of charge, to any person obtaining
16 // a copy of this software and associated documentation files (the
17 // "Software"), to deal in the Software without restriction, including
18 // without limitation the rights to use, copy, modify, merge, publish,
19 // distribute, sublicense, and/or sell copies of the Software, and to
20 // permit persons to whom the Software is furnished to do so, subject to
21 // the following conditions:
23 // The above copyright notice and this permission notice shall be
24 // included in all copies or substantial portions of the Software.
26 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
30 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
31 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
32 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
35 using System.Collections;
36 using System.Collections.Specialized;
40 public class XmlNamespaceManager : IXmlNamespaceResolver, IEnumerable
44 public string Prefix, Uri;
49 public string DefaultNamespace;
58 string defaultNamespace;
63 decls = new NsDecl [10];
64 scopes = new NsScope [40];
67 // precondition declPos == nsDecl.Length
70 NsDecl [] old = decls;
71 decls = new NsDecl [declPos * 2 + 1];
73 Array.Copy (old, 0, decls, 0, declPos);
76 // precondition scopePos == scopes.Length
79 NsScope [] old = scopes;
80 scopes = new NsScope [scopePos * 2 + 1];
82 Array.Copy (old, 0, scopes, 0, scopePos);
89 private XmlNameTable nameTable;
90 internal const string XmlnsXml = "http://www.w3.org/XML/1998/namespace";
91 internal const string XmlnsXmlns = "http://www.w3.org/2000/xmlns/";
92 internal const string PrefixXml = "xml";
93 internal const string PrefixXmlns = "xmlns";
99 public XmlNamespaceManager (XmlNameTable nameTable)
101 this.nameTable = nameTable;
103 nameTable.Add (PrefixXmlns);
104 nameTable.Add (PrefixXml);
105 nameTable.Add (String.Empty);
106 nameTable.Add (XmlnsXmlns);
107 nameTable.Add (XmlnsXml);
116 public virtual string DefaultNamespace {
117 get { return defaultNamespace == null ? string.Empty : defaultNamespace; }
120 public XmlNameTable NameTable {
121 get { return nameTable; }
128 public virtual void AddNamespace (string prefix, string uri)
130 AddNamespace (prefix, uri, false);
133 internal virtual void AddNamespace (string prefix, string uri, bool atomizedNames)
136 throw new ArgumentNullException ("prefix", "Value cannot be null.");
139 throw new ArgumentNullException ("uri", "Value cannot be null.");
140 if (!atomizedNames) {
141 prefix = nameTable.Add (prefix);
142 uri = nameTable.Add (uri);
145 IsValidDeclaration (prefix, uri, true);
147 if (prefix.Length == 0)
148 defaultNamespace = uri;
150 for (int i = declPos; i > declPos - count; i--) {
151 if (object.ReferenceEquals (decls [i].Prefix, prefix)) {
160 if (declPos == decls.Length)
162 decls [declPos].Prefix = prefix;
163 decls [declPos].Uri = uri;
166 internal static string IsValidDeclaration (string prefix, string uri, bool throwException)
168 string message = null;
169 if (prefix == PrefixXml && uri != XmlnsXml)
170 message = String.Format ("Prefix \"xml\" can only be bound to the fixed namespace URI \"{0}\". \"{1}\" is invalid.", XmlnsXml, uri);
171 else if (message == null && prefix == "xmlns")
172 message = "Declaring prefix named \"xmlns\" is not allowed to any namespace.";
173 else if (message == null && uri == XmlnsXmlns)
174 message = String.Format ("Namespace URI \"{0}\" cannot be declared with any namespace.", XmlnsXmlns);
175 if (message != null && throwException)
176 throw new ArgumentException (message);
181 public virtual IEnumerator GetEnumerator ()
183 // In fact it returns such table's enumerator that contains all the namespaces.
184 // while HasNamespace() ignores pushed namespaces.
186 Hashtable ht = new Hashtable ();
187 for (int i = 0; i <= declPos; i++) {
188 if (decls [i].Prefix != string.Empty && decls [i].Uri != null) {
189 ht [decls [i].Prefix] = decls [i].Uri;
193 ht [string.Empty] = DefaultNamespace;
194 ht [PrefixXml] = XmlnsXml;
195 ht [PrefixXmlns] = XmlnsXmlns;
197 return ht.Keys.GetEnumerator ();
201 public virtual IDictionary GetNamespacesInScope (XmlNamespaceScope scope)
203 IDictionary IXmlNamespaceResolver.GetNamespacesInScope (XmlNamespaceScope scope)
205 return GetNamespacesInScope (scope);
208 internal virtual IDictionary GetNamespacesInScope (XmlNamespaceScope scope)
211 Hashtable table = new Hashtable ();
213 if (scope == XmlNamespaceScope.Local) {
214 for (int i = 0; i < count; i++)
215 if (decls [declPos - i].Prefix == String.Empty && decls [declPos - i].Uri == String.Empty) {
216 if (table.Contains (String.Empty))
217 table.Remove (String.Empty);
219 else if (decls [declPos - i].Uri != null)
220 table.Add (decls [declPos - i].Prefix, decls [declPos - i].Uri);
223 for (int i = 0; i <= declPos; i++) {
224 if (decls [i].Prefix == String.Empty && decls [i].Uri == String.Empty) {
225 // removal of default namespace
226 if (table.Contains (String.Empty))
227 table.Remove (String.Empty);
229 else if (decls [i].Uri != null)
230 table [decls [i].Prefix] = decls [i].Uri;
233 if (scope == XmlNamespaceScope.All)
234 table.Add ("xml", XmlNamespaceManager.XmlnsXml);
239 public virtual bool HasNamespace (string prefix)
241 return HasNamespace (prefix, false);
244 internal virtual bool HasNamespace (string prefix, bool atomizedNames)
246 if (prefix == null || count == 0)
249 for (int i = declPos; i > declPos - count; i--) {
250 if (decls [i].Prefix == prefix)
257 public virtual string LookupNamespace (string prefix)
260 return LookupNamespace (prefix, false);
262 return LookupNamespace (prefix, true);
266 internal virtual string LookupNamespace (string prefix, bool atomizedNames)
270 return nameTable.Get (XmlnsXmlns);
272 return nameTable.Get (XmlnsXml);
274 return DefaultNamespace;
279 for (int i = declPos; i >= 0; i--) {
280 if (CompareString (decls [i].Prefix, prefix, atomizedNames) && decls [i].Uri != null /* null == flag for removed */)
281 return decls [i].Uri;
287 public virtual string LookupPrefix (string uri)
290 return LookupPrefix (uri, false);
292 return LookupPrefix (uri, true);
296 private bool CompareString (string s1, string s2, bool atomizedNames)
299 return object.ReferenceEquals (s1, s2);
304 internal string LookupPrefix (string uri, bool atomizedName)
309 if (CompareString (uri, DefaultNamespace, atomizedName))
312 if (CompareString (uri, XmlnsXml, atomizedName))
315 if (CompareString (uri, XmlnsXmlns, atomizedName))
318 for (int i = declPos; i >= 0; i--) {
319 if (CompareString (decls [i].Uri, uri, atomizedName) && decls [i].Prefix.Length > 0) // we already looked for ""
320 return decls [i].Prefix;
323 // ECMA specifies that this method returns String.Empty
324 // in case of no match. But actually MS.NET returns null.
325 // For more information,see
326 // http://lists.ximian.com/archives/public/mono-list/2003-January/005071.html
327 //return String.Empty;
331 public virtual bool PopScope ()
337 defaultNamespace = scopes [scopePos].DefaultNamespace;
338 count = scopes [scopePos].DeclCount;
343 public virtual void PushScope ()
346 if (scopePos == scopes.Length)
349 scopes [scopePos].DefaultNamespace = defaultNamespace;
350 scopes [scopePos].DeclCount = count;
354 // It is rarely used, so we don't need NameTable optimization on it.
355 public virtual void RemoveNamespace (string prefix, string uri)
357 RemoveNamespace (prefix, uri, false);
360 internal virtual void RemoveNamespace (string prefix, string uri, bool atomizedNames)
363 throw new ArgumentNullException ("prefix");
366 throw new ArgumentNullException ("uri");
371 for (int i = declPos; i > declPos - count; i--) {
372 if (CompareString (decls [i].Prefix, prefix, atomizedNames) && CompareString (decls [i].Uri, uri, atomizedNames))
373 decls [i].Uri = null;