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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Syndication
{
using System.Collections.ObjectModel;
using System.Xml;
using System.Xml.Serialization;
using System.Runtime.Serialization;
using System.Globalization;
static class FeedUtils
{
public static string AddLineInfo(XmlReader reader, string error)
{
IXmlLineInfo lineInfo = reader as IXmlLineInfo;
if (lineInfo != null && lineInfo.HasLineInfo())
{
error = String.Format(CultureInfo.InvariantCulture, "{0} {1}", SR.GetString(SR.ErrorInLine, lineInfo.LineNumber, lineInfo.LinePosition), SR.GetString(error));
}
return error;
}
static internal Collection<SyndicationCategory> CloneCategories(Collection<SyndicationCategory> categories)
{
if (categories == null)
{
return null;
}
Collection<SyndicationCategory> result = new NullNotAllowedCollection<SyndicationCategory>();
for (int i = 0; i < categories.Count; ++i)
{
result.Add(categories[i].Clone());
}
return result;
}
static internal Collection<SyndicationLink> CloneLinks(Collection<SyndicationLink> links)
{
if (links == null)
{
return null;
}
Collection<SyndicationLink> result = new NullNotAllowedCollection<SyndicationLink>();
for (int i = 0; i < links.Count; ++i)
{
result.Add(links[i].Clone());
}
return result;
}
static internal Collection<SyndicationPerson> ClonePersons(Collection<SyndicationPerson> persons)
{
if (persons == null)
{
return null;
}
Collection<SyndicationPerson> result = new NullNotAllowedCollection<SyndicationPerson>();
for (int i = 0; i < persons.Count; ++i)
{
result.Add(persons[i].Clone());
}
return result;
}
static internal TextSyndicationContent CloneTextContent(TextSyndicationContent content)
{
if (content == null)
{
return null;
}
return (TextSyndicationContent)(content.Clone());
}
internal static Uri CombineXmlBase(Uri rootBase, string newBase)
{
if (string.IsNullOrEmpty(newBase))
{
return rootBase;
}
Uri newBaseUri = new Uri(newBase, UriKind.RelativeOrAbsolute);
if (rootBase == null || newBaseUri.IsAbsoluteUri)
{
return newBaseUri;
}
return new Uri(rootBase, newBase);
}
internal static Uri GetBaseUriToWrite(Uri rootBase, Uri currentBase)
{
Uri uriToWrite;
if (rootBase == currentBase || currentBase == null)
{
uriToWrite = null;
}
else if (rootBase == null)
{
uriToWrite = currentBase;
}
else
{
// rootBase != currentBase and both are not null
// Write the relative base if possible
if (rootBase.IsAbsoluteUri && currentBase.IsAbsoluteUri && rootBase.IsBaseOf(currentBase))
{
uriToWrite = rootBase.MakeRelativeUri(currentBase);
}
else
{
uriToWrite = currentBase;
}
}
return uriToWrite;
}
static internal string GetUriString(Uri uri)
{
if (uri == null)
{
return null;
}
if (uri.IsAbsoluteUri)
{
return uri.AbsoluteUri;
}
else
{
return uri.ToString();
}
}
static internal bool IsXmlns(string name, string ns)
{
return name == "xmlns" || ns == "http://www.w3.org/2000/xmlns/";
}
internal static bool IsXmlSchemaType(string name, string ns)
{
return name == "type" && ns == "http://www.w3.org/2001/XMLSchema-instance";
}
}
}
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