public IEnumerable <Instruction> ProvideValue(IElementNode node, ModuleDefinition module, ILContext context, out TypeReference memberRef)
{
memberRef = module.ImportReference(("mscorlib", "System", "Type"));
var name = new XmlName("", "TypeName");
if (!node.Properties.TryGetValue(name, out INode typeNameNode) && node.CollectionItems.Any())
{
typeNameNode = node.CollectionItems[0];
}
if (!(typeNameNode is ValueNode valueNode))
{
throw new BuildException(BuildExceptionCode.PropertyMissing, node as IXmlLineInfo, null, "TypeName", typeof(Microsoft.Maui.Controls.Xaml.TypeExtension));
}
if (!node.Properties.ContainsKey(name))
{
node.Properties[name] = typeNameNode;
node.CollectionItems.Clear();
}
var typeref = module.ImportReference(XmlTypeExtensions.GetTypeReference(valueNode.Value as string, module, node as BaseNode));
context.TypeExtensions[node] = typeref ?? throw new BuildException(BuildExceptionCode.TypeResolution, node as IXmlLineInfo, null, valueNode.Value);
return(new List <Instruction> {
Create(Ldtoken, module.ImportReference(typeref)),
Create(Call, module.ImportMethodReference(("mscorlib", "System", "Type"),
methodName: "GetTypeFromHandle",
parameterTypes: new[] { ("mscorlib", "System", "RuntimeTypeHandle") },
public IEnumerable <Instruction> ProvideValue(IElementNode node, ModuleDefinition module, ILContext context, out TypeReference typeRef)
{
typeRef = module.ImportReference(("Microsoft.Maui.Controls", "Microsoft.Maui.Controls", "DataTemplate"));
var name = new XmlName("", "TypeName");
if (!node.Properties.TryGetValue(name, out INode typeNameNode) && node.CollectionItems.Any())
{
typeNameNode = node.CollectionItems[0];
}
if (!(typeNameNode is ValueNode valueNode))
{
throw new BuildException(BuildExceptionCode.PropertyMissing, node as IXmlLineInfo, null, "TypeName", typeof(Microsoft.Maui.Controls.Xaml.DataTemplateExtension));
}
var contentTypeRef = module.ImportReference(XmlTypeExtensions.GetTypeReference(valueNode.Value as string, module, node as BaseNode))
?? throw new BuildException(BuildExceptionCode.TypeResolution, node as IXmlLineInfo, null, valueNode.Value);
var dataTemplateCtor = module.ImportCtorReference(typeRef, new[] { module.ImportReference(("mscorlib", "System", "Type")) });
public IEnumerable <Instruction> ProvideValue(IElementNode node, ModuleDefinition module, ILContext context, out TypeReference memberRef)
{
INode ntype;
if (!node.Properties.TryGetValue(new XmlName("", "Member"), out ntype))
{
ntype = node.CollectionItems[0];
}
var member = ((ValueNode)ntype).Value as string;
if (IsNullOrEmpty(member) || !member.Contains("."))
{
throw new BuildException(BuildExceptionCode.XStaticSyntax, node as IXmlLineInfo, null);
}
var dotIdx = member.LastIndexOf('.');
var typename = member.Substring(0, dotIdx);
var membername = member.Substring(dotIdx + 1);
var typeRef = module.ImportReference(XmlTypeExtensions.GetTypeReference(typename, module, node as BaseNode));
var fieldRef = GetFieldReference(typeRef, membername, module);
var propertyDef = GetPropertyDefinition(typeRef, membername, module);
if (fieldRef == null && propertyDef == null)
{
throw new BuildException(BuildExceptionCode.XStaticResolution, node as IXmlLineInfo, null, membername, typename);
}
var fieldDef = fieldRef?.Resolve();
if (fieldRef != null)
{
memberRef = fieldRef.FieldType;
if (!fieldDef.HasConstant)
{
return new[] { Instruction.Create(OpCodes.Ldsfld, fieldRef) }
}
;
//Constants can be numbers, Boolean values, strings, or a null reference. (https://msdn.microsoft.com/en-us/library/e6w8fe1b.aspx)
if (TypeRefComparer.Default.Equals(memberRef, module.TypeSystem.Boolean))
{
return new[] { Instruction.Create(((bool)fieldDef.Constant) ? OpCodes.Ldc_I4_1 : OpCodes.Ldc_I4_0) }
}
;
if (TypeRefComparer.Default.Equals(memberRef, module.TypeSystem.String))
{
return new[] { Instruction.Create(OpCodes.Ldstr, (string)fieldDef.Constant) }
}
;
if (fieldDef.Constant == null)
{
return new[] { Instruction.Create(OpCodes.Ldnull) }
}
;
if (TypeRefComparer.Default.Equals(memberRef, module.TypeSystem.Char))
{
return new[] { Instruction.Create(OpCodes.Ldc_I4, (char)fieldDef.Constant) }
}
;
if (TypeRefComparer.Default.Equals(memberRef, module.TypeSystem.Single))
{
return new[] { Instruction.Create(OpCodes.Ldc_R4, (float)fieldDef.Constant) }
}
;
if (TypeRefComparer.Default.Equals(memberRef, module.TypeSystem.Double))
{
return new[] { Instruction.Create(OpCodes.Ldc_R8, (double)fieldDef.Constant) }
}
;
if (TypeRefComparer.Default.Equals(memberRef, module.TypeSystem.Byte) || TypeRefComparer.Default.Equals(memberRef, module.TypeSystem.Int16) || TypeRefComparer.Default.Equals(memberRef, module.TypeSystem.Int32))
{
return new[] { Instruction.Create(OpCodes.Ldc_I4, (int)fieldDef.Constant) }
}
;
if (TypeRefComparer.Default.Equals(memberRef, module.TypeSystem.SByte) || TypeRefComparer.Default.Equals(memberRef, module.TypeSystem.UInt16) || TypeRefComparer.Default.Equals(memberRef, module.TypeSystem.UInt32))
{
return new[] { Instruction.Create(OpCodes.Ldc_I4, (uint)fieldDef.Constant) }
}
;
if (TypeRefComparer.Default.Equals(memberRef, module.TypeSystem.Int64))
{
return new[] { Instruction.Create(OpCodes.Ldc_I8, (long)fieldDef.Constant) }
}
;
if (TypeRefComparer.Default.Equals(memberRef, module.TypeSystem.UInt64))
{
return new[] { Instruction.Create(OpCodes.Ldc_I8, (ulong)fieldDef.Constant) }
}
;
//enum values
if (memberRef.ResolveCached().IsEnum)
{
if (fieldDef.Constant is long)
{
return new[] { Instruction.Create(OpCodes.Ldc_I8, (long)fieldDef.Constant) }
}
;
if (fieldDef.Constant is ulong)
{
return new[] { Instruction.Create(OpCodes.Ldc_I8, (ulong)fieldDef.Constant) }
}
;
if (fieldDef.Constant is uint)
{
return new[] { Instruction.Create(OpCodes.Ldc_I4, (uint)fieldDef.Constant) }
}
;
//everything else will cast just fine to an int
return(new[] { Instruction.Create(OpCodes.Ldc_I4, (int)fieldDef.Constant) });
}
}
memberRef = propertyDef.PropertyType;
var getterDef = module.ImportReference(propertyDef.GetMethod);
return(new[] { Instruction.Create(OpCodes.Call, getterDef) });
}