source: branches/2522_RefactorPluginInfrastructure/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory.Xml-5.5.0/AXmlAttribute.cs

// Copyright (c) 2009-2013 AlphaSierraPapa for the SharpDevelop Team
// 
// 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
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// DEALINGS IN THE SOFTWARE.

using System;
using System.Globalization;
using ICSharpCode.NRefactory.Editor;

namespace ICSharpCode.NRefactory.Xml
{
  /// <summary>
  /// Name-value pair in a tag
  /// </summary>
  [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1711:IdentifiersShouldNotHaveIncorrectSuffix")]
  public class AXmlAttribute : AXmlObject
  {
    internal AXmlAttribute(AXmlObject parent, int startOffset, InternalAttribute internalObject)
      : base(parent, startOffset, internalObject)
    {
    }
    
    internal InternalAttribute InternalAttribute {
      get { return (InternalAttribute)internalObject; }
    }
    
    /// <summary> Name with namespace prefix - exactly as in source file </summary>
    public string Name { get { return InternalAttribute.Name; } }
    
    /// <summary> Unquoted and dereferenced value of the attribute </summary>
    public string Value { get { return InternalAttribute.Value; } }
    
    /// <summary>Gets the segment for the attribute name</summary>
    public ISegment NameSegment {
      get { return new XmlSegment(startOffset, startOffset + Name.Length); }
    }
    
    /// <summary>Gets the segment for the attribute value, including the quotes</summary>
    public ISegment ValueSegment {
      get { return new XmlSegment(startOffset + Name.Length + InternalAttribute.EqualsSignLength, this.EndOffset); }
    }
    /// <summary> The element containing this attribute </summary>
    /// <returns> Null if orphaned </returns>
    public AXmlElement ParentElement {
      get {
        AXmlTag tag = this.Parent as AXmlTag;
        if (tag != null) {
          return tag.Parent as AXmlElement;
        }
        return null;
      }
    }
    
    /// <summary> The part of name before ":"</summary>
    /// <returns> Empty string if not found </returns>
    public string Prefix {
      get {
        return GetNamespacePrefix(this.Name);
      }
    }
    
    /// <summary> The part of name after ":" </summary>
    /// <returns> Whole name if ":" not found </returns>
    public string LocalName {
      get {
        return GetLocalName(this.Name);
      }
    }
    
    /// <summary>
    /// Resolved namespace of the name.  Empty string if not found
    /// From the specification: "The namespace name for an unprefixed attribute name always has no value."
    /// </summary>
    public string Namespace {
      get {
        if (string.IsNullOrEmpty(this.Prefix)) return NoNamespace;
        
        AXmlElement elem = this.ParentElement;
        if (elem != null) {
          return elem.LookupNamespace(this.Prefix) ?? NoNamespace;
        }
        return NoNamespace; // Orphaned attribute
      }
    }
    
    /// <summary> Attribute is declaring namespace ("xmlns" or "xmlns:*") </summary>
    public bool IsNamespaceDeclaration {
      get {
        return this.Name == "xmlns" || this.Prefix == "xmlns";
      }
    }
    
    /// <inheritdoc/>
    public override void AcceptVisitor(AXmlVisitor visitor)
    {
      visitor.VisitAttribute(this);
    }
    
    /// <inheritdoc/>
    public override string ToString()
    {
      return string.Format(CultureInfo.InvariantCulture, "[{0} '{1}={2}']", base.ToString(), this.Name, this.Value);
    }
  }
}