//============================================================
// ICOMPARABLE IMPLEMENTATION
//============================================================
#region CompareTo(object obj)
/// <summary>
/// Compares the current instance with another object of the same type.
/// </summary>
/// <param name="obj">An object to compare with this instance.</param>
/// <returns>A 32-bit signed integer that indicates the relative order of the objects being compared.</returns>
/// <exception cref="ArgumentException">The <paramref name="obj"/> is not the expected <see cref="Type"/>.</exception>
public int CompareTo(object obj)
{
//------------------------------------------------------------
// If target is a null reference, instance is greater
//------------------------------------------------------------
if (obj == null)
{
return(1);
}
//------------------------------------------------------------
// Determine comparison result using property state of objects
//------------------------------------------------------------
AtomTextConstruct value = obj as AtomTextConstruct;
if (value != null)
{
int result = String.Compare(this.Content, value.Content, StringComparison.OrdinalIgnoreCase);
result = result | this.TextType.CompareTo(value.TextType);
result = result | AtomUtility.CompareCommonObjectAttributes(this, value);
return(result);
}
else
{
throw new ArgumentException(String.Format(null, "obj is not of type {0}, type was found to be '{1}'.", this.GetType().FullName, obj.GetType().FullName), "obj");
}
}
/// <summary>
/// Saves the current <see cref="AtomTextConstruct"/> to the specified <see cref="XmlWriter"/>.
/// </summary>
/// <param name="writer">The <see cref="XmlWriter"/> to which you want to save.</param>
/// <param name="elementName">The local name of the text construct being written.</param>
/// <exception cref="ArgumentNullException">The <paramref name="writer"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="elementName"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="elementName"/> is an empty string.</exception>
public void WriteTo(XmlWriter writer, string elementName)
{
//------------------------------------------------------------
// Validate parameter
//------------------------------------------------------------
Guard.ArgumentNotNull(writer, "writer");
Guard.ArgumentNotNullOrEmptyString(elementName, "elementName");
//------------------------------------------------------------
// Write XML representation of the current instance
//------------------------------------------------------------
writer.WriteStartElement(elementName, AtomUtility.AtomNamespace);
AtomUtility.WriteCommonObjectAttributes(this, writer);
if (this.TextType == AtomTextConstructType.Xhtml && String.IsNullOrEmpty(writer.LookupPrefix(AtomUtility.XhtmlNamespace)))
{
writer.WriteAttributeString("xmlns", "xhtml", null, AtomUtility.XhtmlNamespace);
}
if (this.TextType != AtomTextConstructType.None)
{
writer.WriteAttributeString("type", AtomTextConstruct.ConstructTypeAsString(this.TextType));
}
if (this.TextType == AtomTextConstructType.Xhtml)
{
writer.WriteStartElement("div", AtomUtility.XhtmlNamespace);
writer.WriteString(this.Content);
writer.WriteEndElement();
}
else
{
writer.WriteString(this.Content);
}
//------------------------------------------------------------
// Write the syndication extensions of the current instance
//------------------------------------------------------------
SyndicationExtensionAdapter.WriteExtensionsTo(this.Extensions, writer);
writer.WriteEndElement();
}
/// <summary>
/// Initializes a new instance of the <see cref="AtomSource"/> class using the supplied <see cref="AtomId"/>, <see cref="AtomTextConstruct"/>, and <see cref="DateTime"/>.
/// </summary>
/// <param name="id">A <see cref="AtomId"/> object that represents a permanent, universally unique identifier for this source.</param>
/// <param name="title">A <see cref="AtomTextConstruct"/> object that represents information that conveys a human-readable title for this source.</param>
/// <param name="utcUpdatedOn">
/// A <see cref="DateTime"/> that indicates the most recent instant in time when this source was modified in a way the publisher considers significant.
/// The <see cref="DateTime"/> should be provided in Coordinated Universal Time (UTC).
/// </param>
public AtomSource(AtomId id, AtomTextConstruct title, DateTime utcUpdatedOn)
{
//------------------------------------------------------------
// Initialize class state using properties
//------------------------------------------------------------
this.Id = id;
this.Title = title;
this.UpdatedOn = utcUpdatedOn;
}
//============================================================
// PUBLIC METHODS
//============================================================
#region Load(XPathNavigator source)
/// <summary>
/// Loads this <see cref="AtomTextConstruct"/> using the supplied <see cref="XPathNavigator"/>.
/// </summary>
/// <param name="source">The <see cref="XPathNavigator"/> to extract information from.</param>
/// <returns><b>true</b> if the <see cref="AtomTextConstruct"/> was initialized using the supplied <paramref name="source"/>, otherwise <b>false</b>.</returns>
/// <remarks>
/// This method expects the supplied <paramref name="source"/> to be positioned on the XML element that represents a <see cref="AtomTextConstruct"/>.
/// </remarks>
/// <exception cref="ArgumentNullException">The <paramref name="source"/> is a null reference (Nothing in Visual Basic).</exception>
public bool Load(XPathNavigator source)
{
//------------------------------------------------------------
// Local members
//------------------------------------------------------------
bool wasLoaded = false;
//------------------------------------------------------------
// Validate parameter
//------------------------------------------------------------
Guard.ArgumentNotNull(source, "source");
//------------------------------------------------------------
// Initialize XML namespace resolver
//------------------------------------------------------------
XmlNamespaceManager manager = AtomUtility.CreateNamespaceManager(source.NameTable);
//------------------------------------------------------------
// Attempt to extract common attributes information
//------------------------------------------------------------
if (AtomUtility.FillCommonObjectAttributes(this, source))
{
wasLoaded = true;
}
//------------------------------------------------------------
// Attempt to extract syndication information
//------------------------------------------------------------
if (source.HasAttributes)
{
string typeAttribute = source.GetAttribute("type", String.Empty);
if (!String.IsNullOrEmpty(typeAttribute))
{
AtomTextConstructType type = AtomTextConstruct.ConstructTypeByName(typeAttribute);
if (type != AtomTextConstructType.None)
{
this.TextType = type;
wasLoaded = true;
}
}
}
if (this.TextType == AtomTextConstructType.Xhtml)
{
XPathNavigator xhtmlDivNavigator = source.SelectSingleNode("xhtml:div", manager);
if (xhtmlDivNavigator != null && !String.IsNullOrEmpty(xhtmlDivNavigator.Value))
{
this.Content = xhtmlDivNavigator.Value;
wasLoaded = true;
}
}
else if (this.TextType == AtomTextConstructType.Html && !String.IsNullOrEmpty(source.InnerXml))
{
this.Content = source.InnerXml;
wasLoaded = true;
}
else if (!String.IsNullOrEmpty(source.Value))
{
this.Content = source.Value;
wasLoaded = true;
}
return(wasLoaded);
}
