private void HandleRootCreation(ref XamlObject obj, XamlParseContext context)
{
int nameStart = _current;
while ((char.IsLetter(CurrentChar) || CurrentChar == ':') && MoveNext())
{
}
string typeName = _value.Substring(nameStart, _current - nameStart);
string ns = string.Empty;
if (typeName.Contains(':'))
{
var parts = typeName.Split(':');
ns = parts[0];
typeName = parts[1];
}
Type extensionType = context.LookupObjectByName(typeName, ns);
if (extensionType is null)
{
throw new Exception();
}
obj = new XamlObject(extensionType);
}
public XamlObject ParseExtension(XamlParseContext context)
{
_current = -1;
XamlObject obj = default;
string attrName = string.Empty;
string attrValue = string.Empty;
while (MoveNext())
{
if (CurrentChar == '{')
{
MoveNext();
while (char.IsWhiteSpace(CurrentChar))
{
MoveNext();
}
HandleRootCreation(ref obj, context);
}
else if (CurrentChar == '}')
{
return(obj);
}
else if (char.IsWhiteSpace(CurrentChar) ||
!string.IsNullOrEmpty(attrName) && CurrentChar == '=')
{
continue;
}
else if (string.IsNullOrEmpty(attrName))
{
attrName = ReadAttributeName();
_current--;
}
else if (!string.IsNullOrEmpty(attrName) &&
string.IsNullOrEmpty(attrValue))
{
if (CurrentChar == '{')
{
var innerParser = new MarkupExtensionParser(_value.Substring(_current));
XamlObject innerExtension = innerParser.ParseExtension(context);
obj.AddProperty(new ExtendedXamlProperty(attrName, innerExtension));
_current += innerParser._current;
}
else
{
attrValue = ReadValue();
obj.AddProperty(new InlineXamlProperty(attrName, attrValue));
_current--;
}
attrName = attrValue = string.Empty;
}
}
return(obj);
}
public XamlReader(TextReader input)
{
_reader = new XmlTextReader(input);
_contexts.Push(XamlParseContext.CreateRootContext());
//Add option to modify it by user
CurrentContext.AddNamespace(new XamlNamespace(string.Empty, "DotX.Styling", "DotX"));
CurrentContext.AddNamespace(new XamlNamespace(string.Empty, "DotX.Xaml.MarkupExtensions", "DotX.Xaml"));
CurrentContext.AddNamespace(new XamlNamespace(string.Empty, "DotX.Brush", "DotX"));
}
private XamlObject ReadObject()
{
XamlParseContext parentContext = CurrentContext;
bool createNewScope = !_reader.IsEmptyElement;
string elementName = _reader.Name;
string ns = string.Empty;
if (elementName.Contains(':'))
{
var parts = elementName.Split(':', StringSplitOptions.RemoveEmptyEntries);
ns = parts[0];
elementName = parts[1];
}
if (elementName.Contains('.'))
{
string[] parts = elementName.Split('.', StringSplitOptions.RemoveEmptyEntries);
if (parts.Length > 2)
{
throw new Exception();
}
CurrentContext.CurrentProperty = new FullXamlProperty(parts[1]);
return(null);
}
if (createNewScope)
{
EnterScope();
}
var attributes = new Dictionary <string, string>();
if (_reader.HasAttributes)
{
_reader.MoveToFirstAttribute();
do
{
attributes.Add(_reader.Name, _reader.Value);
}while(_reader.MoveToNextAttribute());
AddNamespaces(attributes);
}
Type objType = CurrentContext.LookupObjectByName(elementName, ns);
var obj = new XamlObject(objType);
foreach (var attr in attributes)
{
XamlProperty prop;
string trimmedValue = attr.Value.Trim();
if (trimmedValue.StartsWith('{') &&
trimmedValue.EndsWith('}'))
{
var parser = new MarkupExtensionParser(trimmedValue);
var extension = parser.ParseExtension(CurrentContext);
prop = new ExtendedXamlProperty(attr.Key, extension);
}
else if (attr.Key.Contains(':'))
{
var parts = attr.Key.Split(':');
if (parts.Length != 2)
{
throw new XmlException();
}
prop = new AttachedXamlProperty(parts[1], attr.Value, parts[0]);
}
else
{
prop = new InlineXamlProperty(attr.Key, attr.Value);
}
obj.AddProperty(prop);
}
if (createNewScope)
{
CurrentContext.CurrentObject = obj;
}
if (parentContext.CurrentProperty is not null &&
parentContext.CurrentProperty is FullXamlProperty p)
{
p.AddChild(obj);
}
public XamlParseContext(XamlParseContext parentContext)
{
_parent = parentContext;
}