330 lines
8.5 KiB
C#
330 lines
8.5 KiB
C#
//
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// System.Xml.XmlAttribute
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//
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// Authors:
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// Jason Diamond (jason@injektilo.org)
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// Atsushi Enomoto (ginga@kit.hi-ho.ne.jp)
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//
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// (C) 2002 Jason Diamond http://injektilo.org/
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// (C) 2003 Atsushi Enomoto
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Text;
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using System.Xml.XPath;
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using Mono.Xml;
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#if NET_2_0
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using System.Xml.Schema;
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#endif
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namespace System.Xml
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{
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public class XmlAttribute : XmlNode, IHasXmlChildNode
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{
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#region Fields
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private XmlNameEntry name;
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internal bool isDefault;
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XmlLinkedNode lastLinkedChild;
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#if NET_2_0
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private IXmlSchemaInfo schemaInfo;
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#endif
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#endregion
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#region Constructor
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protected internal XmlAttribute (
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string prefix,
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string localName,
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string namespaceURI,
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XmlDocument doc) : this (prefix, localName, namespaceURI, doc, false, true)
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{
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}
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internal XmlAttribute (
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string prefix,
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string localName,
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string namespaceURI,
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XmlDocument doc,
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bool atomizedNames, bool checkNamespace) : base (doc)
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{
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if (!atomizedNames) {
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if (prefix == null)
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prefix = String.Empty;
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if (namespaceURI == null)
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namespaceURI = String.Empty;
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}
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// Prefix "xml" should be also checked (http://www.w3.org/XML/xml-names-19990114-errata#NE05)
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// but MS.NET ignores such case
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if (checkNamespace) {
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if (prefix == "xmlns" || (prefix == "" && localName == "xmlns"))
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if (namespaceURI != XmlNamespaceManager.XmlnsXmlns)
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throw new ArgumentException ("Invalid attribute namespace for namespace declaration.");
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else if (prefix == "xml" && namespaceURI != XmlNamespaceManager.XmlnsXml)
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throw new ArgumentException ("Invalid attribute namespace for namespace declaration.");
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}
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if (!atomizedNames) {
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// There are no means to identify the DOM is
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// namespace-aware or not, so we can only
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// check Name validity.
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if (prefix != "" && !XmlChar.IsName (prefix))
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throw new ArgumentException ("Invalid attribute prefix.");
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else if (!XmlChar.IsName (localName))
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throw new ArgumentException ("Invalid attribute local name.");
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prefix = doc.NameTable.Add (prefix);
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localName = doc.NameTable.Add (localName);
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namespaceURI = doc.NameTable.Add (namespaceURI);
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}
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name = doc.NameCache.Add (prefix, localName, namespaceURI, true);
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}
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#endregion
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#region Properties
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XmlLinkedNode IHasXmlChildNode.LastLinkedChild {
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get { return lastLinkedChild; }
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set { lastLinkedChild = value; }
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}
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public override string BaseURI {
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get { return OwnerElement != null ? OwnerElement.BaseURI : String.Empty; }
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}
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public override string InnerText {
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set {
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Value = value;
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}
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}
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public override string InnerXml {
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set {
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RemoveAll ();
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XmlNamespaceManager nsmgr = ConstructNamespaceManager ();
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XmlParserContext ctx = new XmlParserContext (OwnerDocument.NameTable, nsmgr,
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OwnerDocument.DocumentType != null ? OwnerDocument.DocumentType.DTD : null,
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BaseURI, XmlLang, XmlSpace, null);
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XmlTextReader xtr = new XmlTextReader (value, XmlNodeType.Attribute, ctx);
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xtr.XmlResolver = OwnerDocument.Resolver;
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xtr.Read ();
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OwnerDocument.ReadAttributeNodeValue (xtr, this);
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}
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}
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public override string LocalName {
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get {
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return name.LocalName;
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}
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}
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public override string Name {
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get { return name.GetPrefixedName (OwnerDocument.NameCache); }
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}
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public override string NamespaceURI {
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get {
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return name.NS;
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}
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}
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public override XmlNodeType NodeType {
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get {
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return XmlNodeType.Attribute;
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}
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}
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internal override XPathNodeType XPathNodeType {
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get {
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return XPathNodeType.Attribute;
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}
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}
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public override XmlDocument OwnerDocument {
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get {
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return base.OwnerDocument;
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}
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}
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public virtual XmlElement OwnerElement {
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get { return AttributeOwnerElement; }
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}
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public override XmlNode ParentNode {
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get {
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// It always returns null (by specification).
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return null;
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}
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}
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// We gotta do more in the set block here
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// We need to do the proper tests and throw
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// the correct Exceptions
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//
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// Wrong cases are: (1)check readonly, (2)check character validity,
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// (3)check format validity, (4)this is attribute and qualifiedName != "xmlns"
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public override string Prefix {
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set {
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if (IsReadOnly)
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throw new XmlException ("This node is readonly.");
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if (name.Prefix == "xmlns" && value != "xmlns")
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throw new ArgumentException ("Cannot bind to the reserved namespace.");
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value = OwnerDocument.NameTable.Add (value);
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name = OwnerDocument.NameCache.Add (value,
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name.LocalName, name.NS, true);
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}
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get {
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return name.Prefix;
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}
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}
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#if NET_2_0
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public override IXmlSchemaInfo SchemaInfo {
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get { return schemaInfo; }
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internal set { schemaInfo = value; }
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}
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#endif
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public virtual bool Specified {
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get {
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return !isDefault;
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}
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}
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public override string Value {
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get { return InnerText; }
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set {
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if (this.IsReadOnly)
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throw new ArgumentException ("Attempt to modify a read-only node.");
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OwnerDocument.CheckIdTableUpdate (this, InnerText, value);
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XmlNode textChild = FirstChild as XmlCharacterData;
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if (textChild == null) {
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this.RemoveAll ();
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AppendChild (OwnerDocument.CreateTextNode (value), false);
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}
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else if (FirstChild.NextSibling != null) {
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this.RemoveAll ();
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AppendChild (OwnerDocument.CreateTextNode (value), false);
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}
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else
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textChild.Value = value;
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isDefault = false;
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}
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}
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internal override string XmlLang {
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get { return OwnerElement != null ? OwnerElement.XmlLang : String.Empty; }
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}
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internal override XmlSpace XmlSpace {
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get { return OwnerElement != null ? OwnerElement.XmlSpace : XmlSpace.None; }
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}
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#endregion
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#region Methods
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#if NET_2_0
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public override XmlNode AppendChild (XmlNode newChild)
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{
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return base.AppendChild (newChild);
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}
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public override XmlNode InsertBefore (XmlNode newChild, XmlNode refChild)
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{
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return base.InsertBefore (newChild, refChild);
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}
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public override XmlNode InsertAfter (XmlNode newChild, XmlNode refChild)
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{
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return base.InsertAfter (newChild, refChild);
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}
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public override XmlNode PrependChild (XmlNode newChild)
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{
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return base.PrependChild (newChild);
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}
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public override XmlNode RemoveChild (XmlNode oldChild)
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{
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return base.RemoveChild (oldChild);
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}
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public override XmlNode ReplaceChild (XmlNode newChild, XmlNode oldChild)
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{
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return base.ReplaceChild (newChild, oldChild);
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}
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#endif
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public override XmlNode CloneNode (bool deep)
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{
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XmlNode node = OwnerDocument.CreateAttribute (name.Prefix, name.LocalName, name.NS, true, false);
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if (deep) {
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for (XmlNode n = FirstChild; n != null; n = n.NextSibling)
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node.AppendChild (n.CloneNode (deep), false);
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}
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return node;
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}
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internal void SetDefault ()
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{
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isDefault = true;
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}
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public override void WriteContentTo (XmlWriter w)
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{
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for (XmlNode n = FirstChild; n != null; n = n.NextSibling)
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n.WriteTo (w);
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}
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public override void WriteTo (XmlWriter w)
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{
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if (isDefault)
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return; // Write nothing.
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w.WriteStartAttribute (name.NS.Length > 0 ? name.Prefix : String.Empty, name.LocalName, name.NS);
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WriteContentTo (w);
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w.WriteEndAttribute ();
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}
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internal DTDAttributeDefinition GetAttributeDefinition ()
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{
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if (OwnerElement == null)
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return null;
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// If it is default, then directly create new attribute.
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DTDAttListDeclaration attList = OwnerDocument.DocumentType != null ? OwnerDocument.DocumentType.DTD.AttListDecls [OwnerElement.Name] : null;
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return attList != null ? attList [Name] : null;
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}
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#endregion
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}
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}
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