public static ParsedMarkupExtensionInfo Parse(string raw, IXamlNamespaceResolver nsResolver, XamlSchemaContext sctx)
{
if (raw == null)
{
throw new ArgumentNullException(nameof(raw));
}
if (raw.Length == 0 || raw[0] != '{')
{
throw Error("Invalid markup extension attribute. It should begin with '{{', but was {0}", raw);
}
var ret = new ParsedMarkupExtensionInfo();
int idx = raw.LastIndexOf('}');
if (idx < 0)
{
throw Error("Expected '}}' in the markup extension attribute: '{0}'", raw);
}
raw = raw.Substring(1, idx - 1);
idx = raw.IndexOf(' ');
string name = idx < 0 ? raw : raw.Substring(0, idx);
XamlTypeName xtn;
if (!XamlTypeName.TryParse(name, nsResolver, out xtn))
{
throw Error("Failed to parse type name '{0}'", name);
}
var xt = sctx.GetXamlType(xtn) ?? new XamlType(nsResolver.GetNamespace(""), name, null, sctx);
ret.Type = xt;
if (idx < 0)
{
return(ret);
}
var valueWithoutBinding = raw.Substring(idx + 1, raw.Length - idx - 1);
var vpairs = BindingMembersRegex.Matches(valueWithoutBinding)
.Cast <Match>()
.Select(m => m.Value.Trim())
.ToList();
if (vpairs.Count == 0)
{
vpairs.Add(valueWithoutBinding);
}
List <string> posPrms = null;
XamlMember lastMember = null;
foreach (var vpair in vpairs)
{
idx = vpair.IndexOf('=');
// FIXME: unescape string (e.g. comma)
if (idx < 0)
{
if (vpair.ElementAtOrDefault(0) == ')')
{
if (lastMember != null)
{
if (ret.Arguments[lastMember] is string s)
{
ret.Arguments[lastMember] = s + ')';
}
}
else
{
posPrms[posPrms.Count - 1] += ')';
}
}
else
{
if (posPrms == null)
{
posPrms = new List <string>();
ret.Arguments.Add(XamlLanguage.PositionalParameters, posPrms);
}
posPrms.Add(UnescapeValue(vpair.Trim()));
}
}
else
{
var key = vpair.Substring(0, idx).Trim();
// FIXME: is unknown member always isAttacheable = false?
var xm = xt.GetMember(key) ?? new XamlMember(key, xt, false);
// Binding member values may be wrapped in quotes (single or double) e.g. 'A,B,C,D'.
// Remove those wrapping quotes from the resulting string value.
var valueString = RemoveWrappingStringQuotes(vpair.Substring(idx + 1).Trim());
var value = IsValidMarkupExtension(valueString)
? (object)Parse(valueString, nsResolver, sctx) : UnescapeValue(valueString);
ret.Arguments.Add(xm, value);
lastMember = xm;
}
}
return(ret);
}
// Note that it could return invalid (None) node to tell the caller that it is not really an object element.
IEnumerable <XamlXmlNodeInfo> ReadObjectElement(XamlType parentType, XamlMember currentMember)
{
if (r.NodeType != XmlNodeType.Element)
{
//throw new XamlParseException (String.Format ("Element is expected, but got {0}", r.NodeType));
yield return(Node(XamlNodeType.Value, ReadCurrentContentString(isFirstElementString: false)));
if (r.NodeType != XmlNodeType.Element)
{
r.ReadContentAsString();
}
yield break;
}
if (r.MoveToFirstAttribute())
{
do
{
if (r.NamespaceURI == XamlLanguage.Xmlns2000Namespace)
{
yield return(Node(XamlNodeType.NamespaceDeclaration, new NamespaceDeclaration(r.Value, r.Prefix == "xmlns" ? r.LocalName : String.Empty)));
}
} while (r.MoveToNextAttribute());
r.MoveToElement();
}
var sti = GetStartTagInfo();
using (PushIgnorables(sti.Members))
{
if (IsIgnored(r.Prefix))
{
r.Skip();
yield break;
}
if (r.NodeType != XmlNodeType.Element)
{
//throw new XamlParseException (String.Format ("Element is expected, but got {0}", r.NodeType));
yield return(Node(XamlNodeType.Value, r.Value));
}
var xt = sctx.GetXamlType(sti.TypeName);
if (xt == null)
{
// creates name-only XamlType. Also, it does not seem that it does not store this XamlType to XamlSchemaContext (Try GetXamlType(xtn) after reading such xaml node, it will return null).
xt = new XamlType(sti.Namespace, sti.Name, sti.TypeName.TypeArguments?.Select(xxtn => sctx.GetXamlType(xxtn)).ToArray(), sctx);
}
bool isGetObject = false;
if (currentMember != null && !xt.CanAssignTo(currentMember.Type))
{
if (currentMember.DeclaringType != null && currentMember.DeclaringType.ContentProperty == currentMember)
{
isGetObject = true;
}
// It could still be GetObject if current_member
// is not a directive and current type is not
// a markup extension.
// (I'm not very sure about the condition;
// it could be more complex.)
// seealso: bug #682131
else if (!(currentMember is XamlDirective) &&
!xt.IsMarkupExtension)
{
isGetObject = true;
}
}
if (isGetObject)
{
yield return(Node(XamlNodeType.GetObject, currentMember.Type));
foreach (var ni in ReadMembers(parentType, currentMember.Type))
{
yield return(ni);
}
yield return(Node(XamlNodeType.EndObject, currentMember.Type));
yield break;
}
// else
yield return(Node(XamlNodeType.StartObject, xt));
// process attribute members (including MarkupExtensions)
ProcessAttributesToMember(sctx, sti, xt);
foreach (var pair in sti.Members)
{
if (pair.Key == XamlLanguage.Ignorable)
{
continue;
}
yield return(Node(XamlNodeType.StartMember, pair.Key));
// Try markup extension
// FIXME: is this rule correct?
var v = pair.Value;
if (!String.IsNullOrEmpty(v) && v[0] == '{' && v.ElementAtOrDefault(1) != '}')
{
IEnumerable <XamlXmlNodeInfo> ProcessArgs(ParsedMarkupExtensionInfo info)
{
yield return(Node(XamlNodeType.StartObject, info.Type));
foreach (var xepair in info.Arguments)
{
yield return(Node(XamlNodeType.StartMember, xepair.Key));
switch (xepair.Value)
{
case List <string> list:
foreach (var s in list)
{
yield return(Node(XamlNodeType.Value, s));
}
break;
case ParsedMarkupExtensionInfo inner:
foreach (var innerInfo in ProcessArgs(inner))
{
yield return(innerInfo);
}
break;
default:
yield return(Node(XamlNodeType.Value, xepair.Value));
break;
}
yield return(Node(XamlNodeType.EndMember, xepair.Key));
}
yield return(Node(XamlNodeType.EndObject, info.Type));
}
var pai = ParsedMarkupExtensionInfo.Parse(v, xaml_namespace_resolver, sctx);
foreach (var info in ProcessArgs(pai))
{
yield return(info);
}
}
else
{
yield return(Node(XamlNodeType.Value, CleanupBindingEscape(pair.Value)));
}
yield return(Node(XamlNodeType.EndMember, pair.Key));
}
// process content members
if (!r.IsEmptyElement)
{
r.Read();
foreach (var ni in ReadMembers(parentType, xt))
{
yield return(ni);
}
r.ReadEndElement();
}
else
{
r.Read(); // consume empty element.
}
yield return(Node(XamlNodeType.EndObject, xt));
}
}
public static ParsedMarkupExtensionInfo Parse(string raw, IXamlNamespaceResolver nsResolver, XamlSchemaContext sctx)
{
if (raw == null)
{
throw new ArgumentNullException(nameof(raw));
}
if (raw.Length == 0 || raw[0] != '{')
{
throw Error("Invalid markup extension attribute. It should begin with '{{', but was {0}", raw);
}
if (raw.Length >= 2 && raw[1] == '}')
{
throw Error("Markup extension can not begin with an '{}' escape: '{0}'", raw);
}
var ret = new ParsedMarkupExtensionInfo();
if (raw[raw.Length - 1] != '}')
{
// Any character after the final closing bracket is not accepted. Therefore, the last character should be '}'.
// Ideally, we should still ran the entire markup through the parser to get a more meaningful error.
throw Error("Expected '}}' in the markup extension attribute: '{0}'", raw);
}
var nameSeparatorIndex = raw.IndexOf(' ');
var name = nameSeparatorIndex != -1 ? raw.Substring(1, nameSeparatorIndex - 1) : raw.Substring(1, raw.Length - 2);
if (!XamlTypeName.TryParse(name, nsResolver, out var xtn))
{
throw Error("Failed to parse type name '{0}'", name);
}
var xt = sctx.GetXamlType(xtn) ?? new XamlType(xtn.Namespace, xtn.Name, null, sctx);
ret.Type = xt;
if (nameSeparatorIndex < 0)
{
return(ret);
}
var valueWithoutBinding = raw.Substring(nameSeparatorIndex + 1, raw.Length - 1 - (nameSeparatorIndex + 1));
var vpairs = SliceParameters(valueWithoutBinding, raw);
List <string> posPrms = null;
XamlMember lastMember = null;
foreach (var vpair in vpairs)
{
var idx = vpair.IndexOf('=');
// FIXME: unescape string (e.g. comma)
if (idx < 0)
{
if (vpair.ElementAtOrDefault(0) == ')')
{
if (lastMember != null)
{
if (ret.Arguments[lastMember] is string s)
{
ret.Arguments[lastMember] = s + ')';
}
}
else
{
posPrms[posPrms.Count - 1] += ')';
}
}
else
{
if (posPrms == null)
{
posPrms = new List <string>();
ret.Arguments.Add(XamlLanguage.PositionalParameters, posPrms);
}
posPrms.Add(UnescapeValue(vpair.Trim()));
}
}
else
{
var key = vpair.Substring(0, idx).Trim();
// FIXME: is unknown member always isAttacheable = false?
var xm = xt.GetMember(key) ?? new XamlMember(key, xt, false);
// Binding member values may be wrapped in quotes (single or double) e.g. 'A,B,C,D'.
// Remove those wrapping quotes from the resulting string value.
var valueString = RemoveWrappingStringQuotes(vpair.Substring(idx + 1).Trim());
var value = IsValidMarkupExtension(valueString)
? (object)Parse(valueString, nsResolver, sctx) : UnescapeValue(valueString);
ret.Arguments.Add(xm, value);
lastMember = xm;
}
}
return(ret);
}
