static IList <string> PrefixesToIgnore(IList <KeyValuePair <string, string> > xmlns)
{
var prefixes = new List <string>();
foreach (var kvp in xmlns)
{
var prefix = kvp.Key;
string typeName = null, ns = null, asm = null, targetPlatform = null;
XmlnsHelper.ParseXmlns(kvp.Value, out typeName, out ns, out asm, out targetPlatform);
if (targetPlatform == null)
{
continue;
}
try {
if (targetPlatform != Device.RuntimePlatform)
{
// Special case for Windows backward compatibility
if (targetPlatform == "Windows" && Device.RuntimePlatform == Device.UWP)
{
continue;
}
prefixes.Add(prefix);
}
} catch (InvalidOperationException) {
prefixes.Add(prefix);
}
}
return(prefixes);
}
public static T GetTypeReference <T>(
this XmlType xmlType,
IEnumerable <XmlnsDefinitionAttribute> xmlnsDefinitions,
string defaultAssemblyName,
Func <XamlLoader.FallbackTypeInfo, T> refFromTypeInfo,
out IList <XamlLoader.FallbackTypeInfo> potentialTypes)
where T : class
{
var lookupAssemblies = new List <XmlnsDefinitionAttribute>();
var namespaceURI = xmlType.NamespaceUri;
var elementName = xmlType.Name;
var typeArguments = xmlType.TypeArguments;
potentialTypes = null;
foreach (var xmlnsDef in xmlnsDefinitions)
{
if (xmlnsDef.XmlNamespace != namespaceURI)
{
continue;
}
lookupAssemblies.Add(xmlnsDef);
}
if (lookupAssemblies.Count == 0)
{
XmlnsHelper.ParseXmlns(namespaceURI, out _, out var ns, out var asmstring, out _);
asmstring = asmstring ?? defaultAssemblyName;
if (namespaceURI != null && ns != null)
{
lookupAssemblies.Add(new XmlnsDefinitionAttribute(namespaceURI, ns)
{
AssemblyName = asmstring
});
}
}
var lookupNames = new List <string>();
if (elementName != "DataTemplate" && !elementName.EndsWith("Extension", StringComparison.Ordinal))
{
lookupNames.Add(elementName + "Extension");
}
lookupNames.Add(elementName);
for (var i = 0; i < lookupNames.Count; i++)
{
var name = lookupNames[i];
if (name.Contains(":"))
{
name = name.Substring(name.LastIndexOf(':') + 1);
}
if (typeArguments != null)
{
name += "`" + typeArguments.Count; //this will return an open generic Type
}
lookupNames[i] = name;
}
potentialTypes = new List <XamlLoader.FallbackTypeInfo>();
foreach (string typeName in lookupNames)
{
foreach (XmlnsDefinitionAttribute xmlnsDefinitionAttribute in lookupAssemblies)
{
potentialTypes.Add(new XamlLoader.FallbackTypeInfo {
ClrNamespace = xmlnsDefinitionAttribute.ClrNamespace,
TypeName = typeName,
AssemblyName = xmlnsDefinitionAttribute.AssemblyName,
XmlNamespace = xmlnsDefinitionAttribute.XmlNamespace
});
}
}
T type = null;
foreach (XamlLoader.FallbackTypeInfo typeInfo in potentialTypes)
{
if ((type = refFromTypeInfo(typeInfo)) != null)
{
break;
}
}
return(type);
}
