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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Collections.Specialized;
using System.Diagnostics;
using System.Globalization;
using System.Linq;
using Tango.Scripting.Editors.Document;
namespace Tango.Scripting.Editors.Xml
{
/// <summary>
/// Name-value pair in a tag
/// </summary>
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1711:IdentifiersShouldNotHaveIncorrectSuffix")]
public class AXmlAttribute: AXmlObject
{
/// <summary> Name with namespace prefix - exactly as in source file </summary>
public string Name { get; internal set; }
/// <summary> Equals sign and surrounding whitespace </summary>
public string EqualsSign { get; internal set; }
/// <summary> The raw value - exactly as in source file (*probably* quoted and escaped) </summary>
public string QuotedValue { get; internal set; }
/// <summary> Unquoted and dereferenced value of the attribute </summary>
public string Value { get; internal set; }
internal override void DebugCheckConsistency(bool checkParentPointers)
{
DebugAssert(Name != null, "Null Name");
DebugAssert(EqualsSign != null, "Null EqualsSign");
DebugAssert(QuotedValue != null, "Null QuotedValue");
DebugAssert(Value != null, "Null Value");
base.DebugCheckConsistency(checkParentPointers);
}
#region Helpper methods
/// <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.ResolvePrefix(this.Prefix);
}
return NoNamespace; // Orphaned attribute
}
}
/// <summary> Attribute is declaring namespace ("xmlns" or "xmlns:*") </summary>
public bool IsNamespaceDeclaration {
get {
return this.Name == "xmlns" || this.Prefix == "xmlns";
}
}
#endregion
/// <inheritdoc/>
public override void AcceptVisitor(IAXmlVisitor visitor)
{
visitor.VisitAttribute(this);
}
/// <inheritdoc/>
internal override bool UpdateDataFrom(AXmlObject source)
{
if (!base.UpdateDataFrom(source)) return false;
AXmlAttribute src = (AXmlAttribute)source;
if (this.Name != src.Name ||
this.EqualsSign != src.EqualsSign ||
this.QuotedValue != src.QuotedValue ||
this.Value != src.Value)
{
OnChanging();
this.Name = src.Name;
this.EqualsSign = src.EqualsSign;
this.QuotedValue = src.QuotedValue;
this.Value = src.Value;
OnChanged();
return true;
} else {
return false;
}
}
/// <inheritdoc/>
public override string ToString()
{
return string.Format(CultureInfo.InvariantCulture, "[{0} '{1}{2}{3}']", base.ToString(), this.Name, this.EqualsSign, this.Value);
}
}
}
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