public static bool CustomValueConverter(AstTransformationContext context,
IXamlAstValueNode node, IXamlType type, out IXamlAstValueNode result)
{
if (type.FullName == "System.TimeSpan" &&
node is XamlAstTextNode tn &&
!tn.Text.Contains(":"))
{
var seconds = double.Parse(tn.Text, CultureInfo.InvariantCulture);
result = new XamlStaticOrTargetedReturnMethodCallNode(tn,
type.FindMethod("FromSeconds", type, false, context.Configuration.WellKnownTypes.Double),
new[]
{
new XamlConstantNode(tn, context.Configuration.WellKnownTypes.Double, seconds)
});
return(true);
}
if (type.FullName == "Avalonia.AvaloniaProperty")
{
var scope = context.ParentNodes().OfType <AvaloniaXamlIlTargetTypeMetadataNode>().FirstOrDefault();
if (scope == null)
{
throw new XamlX.XamlLoadException("Unable to find the parent scope for AvaloniaProperty lookup", node);
}
if (!(node is XamlAstTextNode text))
{
throw new XamlX.XamlLoadException("Property should be a text node", node);
}
result = XamlIlAvaloniaPropertyHelper.CreateNode(context, text.Text, scope.TargetType, text);
return(true);
}
result = null;
return(false);
}
public bool EmitCall(IXamlPropertySetter setter, IXamlILEmitter emitter)
{
if (setter is XamlDirectSetter xdirect)
{
var paramType = setter.Parameters[0];
var expectedParameters = new [] { xdirect.WinUITypes.IXamlDirectObject, xdirect.WinUITypes.XamlPropertyIndex, paramType };
IXamlType xamlDirectType = xdirect.WinUITypes.XamlDirect;
var setterMethod = xamlDirectType
.FindMethod(m => !m.IsStatic &&
m.Name.StartsWith("Set") &&
m.ReturnType == emitter.TypeSystem.FindType("System.Void") &&
m.Parameters.SequenceEqual(expectedParameters));
using (var objLocal = emitter.LocalsPool.GetLocal(xdirect.WinUITypes.IXamlDirectObject))
using (var valLocal = emitter.LocalsPool.GetLocal(paramType))
{
emitter
.Stloc(valLocal.Local)
.Stloc(objLocal.Local)
.EmitCall(xamlDirectType.GetMethod(new FindMethodMethodSignature("GetDefault", xamlDirectType)
{
IsStatic = true
}))
.Ldloc(objLocal.Local)
.Ldc_I4((int)xdirect.PropertyIndex.GetLiteralValue())
.Ldloc(valLocal.Local)
.EmitCall(setterMethod);
}
return(true);
}
return(false);
}
public static bool CustomValueConverter(AstTransformationContext context,
IXamlAstValueNode node, IXamlType type, out IXamlAstValueNode result)
{
if (!(node is XamlAstTextNode textNode))
{
result = null;
return(false);
}
var text = textNode.Text;
var types = context.GetAvaloniaTypes();
if (type.FullName == "System.TimeSpan")
{
var tsText = text.Trim();
if (!TimeSpan.TryParse(tsText, CultureInfo.InvariantCulture, out var timeSpan))
{
// // shorthand seconds format (ie. "0.25")
if (!tsText.Contains(":") && double.TryParse(tsText,
NumberStyles.Float | NumberStyles.AllowThousands,
CultureInfo.InvariantCulture, out var seconds))
{
timeSpan = TimeSpan.FromSeconds(seconds);
}
else
{
throw new XamlX.XamlLoadException($"Unable to parse {text} as a time span", node);
}
}
result = new XamlStaticOrTargetedReturnMethodCallNode(node,
type.FindMethod("FromTicks", type, false, types.Long),
new[] { new XamlConstantNode(node, types.Long, timeSpan.Ticks) });
return(true);
}
if (type.Equals(types.FontFamily))
{
result = new AvaloniaXamlIlFontFamilyAstNode(types, text, node);
return(true);
}
if (type.FullName == "Avalonia.AvaloniaProperty")
{
var scope = context.ParentNodes().OfType <AvaloniaXamlIlTargetTypeMetadataNode>().FirstOrDefault();
if (scope == null)
{
throw new XamlX.XamlLoadException("Unable to find the parent scope for AvaloniaProperty lookup", node);
}
result = XamlIlAvaloniaPropertyHelper.CreateNode(context, text, scope.TargetType, node);
return(true);
}
result = null;
return(false);
}
public bool EmitCall(IXamlPropertySetter setter, IXamlILEmitter emitter)
{
if (setter is XamlDirectAdderSetter xdirect)
{
var paramType = setter.Parameters[0];
IXamlType xamlDirectType = xdirect.WinUITypes.XamlDirect;
var getCollectionMethod = xamlDirectType.GetMethod(
new FindMethodMethodSignature("GetXamlDirectObjectProperty",
xdirect.WinUITypes.IXamlDirectObject,
xdirect.WinUITypes.IXamlDirectObject,
xdirect.WinUITypes.XamlPropertyIndex));
var addToCollection = xamlDirectType.GetMethod(
new FindMethodMethodSignature("AddToCollection",
emitter.TypeSystem.GetType("System.Void"),
xdirect.WinUITypes.IXamlDirectObject,
xdirect.WinUITypes.IXamlDirectObject));
using (var objLocal = emitter.LocalsPool.GetLocal(xdirect.WinUITypes.IXamlDirectObject))
using (var valLocal = emitter.LocalsPool.GetLocal(paramType))
{
emitter
.Stloc(valLocal.Local)
.Stloc(objLocal.Local)
.EmitCall(xamlDirectType.GetMethod(new FindMethodMethodSignature("GetDefault", xamlDirectType)
{
IsStatic = true
}))
.Dup();
emitter
.Ldloc(objLocal.Local)
.Ldc_I4((int)xdirect.PropertyIndex.GetLiteralValue())
.EmitCall(getCollectionMethod);
if (paramType != xdirect.WinUITypes.IXamlDirectObject)
{
emitter
.EmitCall(xamlDirectType.GetMethod(new FindMethodMethodSignature("GetDefault", xamlDirectType)
{
IsStatic = true
}))
.Ldloc(valLocal.Local)
.EmitCall(xamlDirectType.FindMethod(m => m.Name == "GetXamlDirectObject"));
}
else
{
emitter.Ldloc(valLocal.Local);
}
emitter
.EmitCall(addToCollection);
}
return(true);
}
return(false);
}
private IXamlMethodBuilder <IXamlILEmitter> ImplementInterfacePropertyGetter(IXamlTypeBuilder <IXamlILEmitter> builder,
IXamlType type, string name)
{
var prefix = type.Namespace + "." + type.Name + ".";
var originalGetter = type.FindMethod(m => m.Name == "get_" + name);
var gen = builder.DefineMethod(originalGetter.ReturnType, new IXamlType[0],
prefix + "get_" + name, false, false,
true, originalGetter);
builder.DefineProperty(originalGetter.ReturnType, prefix + name, null, gen);
return(gen);
}
public static bool TryConvert(AstTransformationContext context, IXamlAstValueNode node, string text, IXamlType type, AvaloniaXamlIlWellKnownTypes types, out IXamlAstValueNode result)
{
if (type.FullName == "System.TimeSpan")
{
var tsText = text.Trim();
if (!TimeSpan.TryParse(tsText, CultureInfo.InvariantCulture, out var timeSpan))
{
// // shorthand seconds format (ie. "0.25")
if (!tsText.Contains(":") && double.TryParse(tsText,
NumberStyles.Float | NumberStyles.AllowThousands,
CultureInfo.InvariantCulture, out var seconds))
{
timeSpan = TimeSpan.FromSeconds(seconds);
}
else
{
throw new XamlX.XamlLoadException($"Unable to parse {text} as a time span", node);
}
}
result = new XamlStaticOrTargetedReturnMethodCallNode(node,
type.FindMethod("FromTicks", type, false, types.Long),
new[] { new XamlConstantNode(node, types.Long, timeSpan.Ticks) });
return(true);
}
if (type.Equals(types.FontFamily))
{
result = new AvaloniaXamlIlFontFamilyAstNode(types, text, node);
return(true);
}
if (type.Equals(types.Thickness))
{
try
{
var thickness = Thickness.Parse(text);
result = new AvaloniaXamlIlVectorLikeConstantAstNode(node, types, types.Thickness, types.ThicknessFullConstructor,
new[] { thickness.Left, thickness.Top, thickness.Right, thickness.Bottom });
return(true);
}
catch
{
throw new XamlX.XamlLoadException($"Unable to parse \"{text}\" as a thickness", node);
}
}
if (type.Equals(types.Point))
{
try
{
var point = Point.Parse(text);
result = new AvaloniaXamlIlVectorLikeConstantAstNode(node, types, types.Point, types.PointFullConstructor,
new[] { point.X, point.Y });
return(true);
}
catch
{
throw new XamlX.XamlLoadException($"Unable to parse \"{text}\" as a point", node);
}
}
if (type.Equals(types.Vector))
{
try
{
var vector = Vector.Parse(text);
result = new AvaloniaXamlIlVectorLikeConstantAstNode(node, types, types.Vector, types.VectorFullConstructor,
new[] { vector.X, vector.Y });
return(true);
}
catch
{
throw new XamlX.XamlLoadException($"Unable to parse \"{text}\" as a vector", node);
}
}
if (type.Equals(types.Size))
{
try
{
var size = Size.Parse(text);
result = new AvaloniaXamlIlVectorLikeConstantAstNode(node, types, types.Size, types.SizeFullConstructor,
new[] { size.Width, size.Height });
return(true);
}
catch
{
throw new XamlX.XamlLoadException($"Unable to parse \"{text}\" as a size", node);
}
}
if (type.Equals(types.Matrix))
{
try
{
var matrix = Matrix.Parse(text);
result = new AvaloniaXamlIlVectorLikeConstantAstNode(node, types, types.Matrix, types.MatrixFullConstructor,
new[] { matrix.M11, matrix.M12, matrix.M21, matrix.M22, matrix.M31, matrix.M32 });
return(true);
}
catch
{
throw new XamlX.XamlLoadException($"Unable to parse \"{text}\" as a matrix", node);
}
}
if (type.Equals(types.CornerRadius))
{
try
{
var cornerRadius = CornerRadius.Parse(text);
result = new AvaloniaXamlIlVectorLikeConstantAstNode(node, types, types.CornerRadius, types.CornerRadiusFullConstructor,
new[] { cornerRadius.TopLeft, cornerRadius.TopRight, cornerRadius.BottomRight, cornerRadius.BottomLeft });
return(true);
}
catch
{
throw new XamlX.XamlLoadException($"Unable to parse \"{text}\" as a corner radius", node);
}
}
if (type.Equals(types.Color))
{
if (!Color.TryParse(text, out Color color))
{
throw new XamlX.XamlLoadException($"Unable to parse \"{text}\" as a color", node);
}
result = new XamlStaticOrTargetedReturnMethodCallNode(node,
type.GetMethod(
new FindMethodMethodSignature("FromUInt32", type, types.UInt)
{
IsStatic = true
}),
new[] { new XamlConstantNode(node, types.UInt, color.ToUint32()) });
return(true);
}
if (type.Equals(types.GridLength))
{
try
{
var gridLength = GridLength.Parse(text);
result = new AvaloniaXamlIlGridLengthAstNode(node, types, gridLength);
return(true);
}
catch
{
throw new XamlX.XamlLoadException($"Unable to parse \"{text}\" as a grid length", node);
}
}
if (type.Equals(types.Cursor))
{
if (TypeSystemHelpers.TryGetEnumValueNode(types.StandardCursorType, text, node, out var enumConstantNode))
{
var cursorTypeRef = new XamlAstClrTypeReference(node, types.Cursor, false);
result = new XamlAstNewClrObjectNode(node, cursorTypeRef, types.CursorTypeConstructor, new List <IXamlAstValueNode> {
enumConstantNode
});
return(true);
}
}
if (type.Equals(types.ColumnDefinitions))
{
return(ConvertDefinitionList(node, text, types, types.ColumnDefinitions, types.ColumnDefinition, "column definitions", out result));
}
if (type.Equals(types.RowDefinitions))
{
return(ConvertDefinitionList(node, text, types, types.RowDefinitions, types.RowDefinition, "row definitions", out result));
}
if (type.Equals(types.Classes))
{
var classes = text.Split(' ');
var classNodes = classes.Select(c => new XamlAstTextNode(node, c, types.XamlIlTypes.String)).ToArray();
result = new AvaloniaXamlIlAvaloniaListConstantAstNode(node, types, types.Classes, types.XamlIlTypes.String, classNodes);
return(true);
}
result = null;
return(false);
}
public static bool CustomValueConverter(AstTransformationContext context,
IXamlAstValueNode node, IXamlType type, out IXamlAstValueNode result)
{
if (!(node is XamlAstTextNode textNode))
{
result = null;
return(false);
}
var text = textNode.Text;
var types = context.GetAvaloniaTypes();
if (type.FullName == "System.TimeSpan")
{
var tsText = text.Trim();
if (!TimeSpan.TryParse(tsText, CultureInfo.InvariantCulture, out var timeSpan))
{
// // shorthand seconds format (ie. "0.25")
if (!tsText.Contains(":") && double.TryParse(tsText,
NumberStyles.Float | NumberStyles.AllowThousands,
CultureInfo.InvariantCulture, out var seconds))
{
timeSpan = TimeSpan.FromSeconds(seconds);
}
else
{
throw new XamlX.XamlLoadException($"Unable to parse {text} as a time span", node);
}
}
result = new XamlStaticOrTargetedReturnMethodCallNode(node,
type.FindMethod("FromTicks", type, false, types.Long),
new[] { new XamlConstantNode(node, types.Long, timeSpan.Ticks) });
return(true);
}
if (type.Equals(types.FontFamily))
{
result = new AvaloniaXamlIlFontFamilyAstNode(types, text, node);
return(true);
}
if (type.Equals(types.Thickness))
{
var thickness = Thickness.Parse(text);
result = new AvaloniaXamlIlVectorLikeConstantAstNode(node, types, types.Thickness, types.ThicknessFullConstructor,
new[] { thickness.Left, thickness.Top, thickness.Right, thickness.Bottom });
return(true);
}
if (type.Equals(types.Point))
{
var point = Point.Parse(text);
result = new AvaloniaXamlIlVectorLikeConstantAstNode(node, types, types.Point, types.PointFullConstructor,
new[] { point.X, point.Y });
return(true);
}
if (type.Equals(types.Vector))
{
var vector = Vector.Parse(text);
result = new AvaloniaXamlIlVectorLikeConstantAstNode(node, types, types.Vector, types.VectorFullConstructor,
new[] { vector.X, vector.Y });
return(true);
}
if (type.Equals(types.Size))
{
var size = Size.Parse(text);
result = new AvaloniaXamlIlVectorLikeConstantAstNode(node, types, types.Size, types.SizeFullConstructor,
new[] { size.Width, size.Height });
return(true);
}
if (type.Equals(types.Matrix))
{
var matrix = Matrix.Parse(text);
result = new AvaloniaXamlIlVectorLikeConstantAstNode(node, types, types.Matrix, types.MatrixFullConstructor,
new[] { matrix.M11, matrix.M12, matrix.M21, matrix.M22, matrix.M31, matrix.M32 });
return(true);
}
if (type.Equals(types.CornerRadius))
{
var cornerRadius = CornerRadius.Parse(text);
result = new AvaloniaXamlIlVectorLikeConstantAstNode(node, types, types.CornerRadius, types.CornerRadiusFullConstructor,
new[] { cornerRadius.TopLeft, cornerRadius.TopRight, cornerRadius.BottomRight, cornerRadius.BottomLeft });
return(true);
}
if (type.FullName == "Avalonia.AvaloniaProperty")
{
var scope = context.ParentNodes().OfType <AvaloniaXamlIlTargetTypeMetadataNode>().FirstOrDefault();
if (scope == null)
{
throw new XamlX.XamlLoadException("Unable to find the parent scope for AvaloniaProperty lookup", node);
}
result = XamlIlAvaloniaPropertyHelper.CreateNode(context, text, scope.TargetType, node);
return(true);
}
result = null;
return(false);
}
public static bool TryConvertValue(AstTransformationContext context,
IXamlAstValueNode node, IXamlType type, XamlAstClrProperty propertyContext,
out IXamlAstValueNode rv)
{
rv = null;
var cfg = context.Configuration;
// Since we are doing a conversion anyway, it makes sense to check for the underlying nullable type
if (type.GenericTypeDefinition?.Equals(cfg.WellKnownTypes.NullableT) == true)
{
type = type.GenericArguments[0];
}
if (cfg.CustomValueConverter?.Invoke(context, node, type, out rv) == true)
{
return(true);
}
var nodeType = node.Type.GetClrType();
// Implicit type converters
if (!nodeType.Equals(cfg.WellKnownTypes.String))
{
return(false);
}
if (node is XamlAstTextNode tn)
{
if (type.IsEnum)
{
if (TypeSystemHelpers.TryGetEnumValueNode(type, tn.Text, tn, out var enumConstantNode))
{
rv = enumConstantNode;
return(true);
}
}
// Well known types
if (TypeSystemHelpers.ParseConstantIfTypeAllows(tn.Text, type, tn, out var constantNode))
{
rv = constantNode;
return(true);
}
if (type.FullName == "System.Type")
{
var resolvedType = TypeReferenceResolver.ResolveType(context, tn.Text, false, tn, true);
rv = new XamlTypeExtensionNode(tn, resolvedType, type);
return(true);
}
if (cfg.WellKnownTypes.Delegate.IsAssignableFrom(type))
{
var invoke = type.FindMethod(m => m.Name == "Invoke");
var rootType = context.RootObject.Type.GetClrType();
var handler =
rootType.FindMethod(tn.Text, invoke.ReturnType, false, invoke.Parameters.ToArray());
if (handler != null)
{
rv = new XamlLoadMethodDelegateNode(tn, context.RootObject, type, handler);
return(true);
}
}
}
IXamlAstValueNode CreateInvariantCulture() =>
new XamlStaticOrTargetedReturnMethodCallNode(node,
cfg.WellKnownTypes.CultureInfo.Methods.First(x =>
x.IsPublic && x.IsStatic && x.Name == "get_InvariantCulture"), null);
var candidates = type.Methods.Where(m => m.Name == "Parse" &&
m.ReturnType.Equals(type) &&
m.Parameters.Count > 0 &&
m.Parameters[0].Equals(cfg.WellKnownTypes.String)).ToList();
// Types with parse method
var parser = candidates.FirstOrDefault(m =>
m.Parameters.Count == 2 &&
(
m.Parameters[1].Equals(cfg.WellKnownTypes.CultureInfo) ||
m.Parameters[1].Equals(cfg.WellKnownTypes.IFormatProvider)
)
)
?? candidates.FirstOrDefault(m => m.Parameters.Count == 1);
if (parser != null)
{
var args = new List <IXamlAstValueNode> {
node
};
if (parser.Parameters.Count == 2)
{
args.Add(CreateInvariantCulture());
}
rv = new XamlStaticOrTargetedReturnMethodCallNode(node, parser, args);
return(true);
}
if (cfg.TypeMappings.TypeDescriptorContext != null)
{
IXamlType converterType = null;
if (propertyContext?.TypeConverters.TryGetValue(type, out converterType) != true)
{
var typeConverterAttribute =
cfg.GetCustomAttribute(type, cfg.TypeMappings.TypeConverterAttributes).FirstOrDefault();
if (typeConverterAttribute != null)
{
converterType = TryGetTypeConverterFromCustomAttribute(cfg, typeConverterAttribute);
}
}
if (converterType != null)
{
var converterMethod = converterType.FindMethod("ConvertFrom", cfg.WellKnownTypes.Object, false,
cfg.TypeMappings.TypeDescriptorContext, cfg.WellKnownTypes.CultureInfo,
cfg.WellKnownTypes.Object);
rv = new XamlAstNeedsParentStackValueNode(node,
new XamlAstRuntimeCastNode(node,
new XamlStaticOrTargetedReturnMethodCallNode(node, converterMethod,
new[]
{
new XamlAstNewClrObjectNode(node,
new XamlAstClrTypeReference(node, converterType, false), null,
new List <IXamlAstValueNode>()),
new XamlAstContextLocalNode(node, cfg.TypeMappings.TypeDescriptorContext),
CreateInvariantCulture(), node
}), new XamlAstClrTypeReference(node, type, false)));
return(true);
}
}
return(false);
}
public static void EmitConvert(XamlEmitContextWithLocals <IXamlILEmitter, XamlILNodeEmitResult> context, IXamlLineInfo node, IXamlType what,
IXamlType to, Func <bool, IXamlILEmitter> ld)
{
if (what.Equals(to))
{
ld(false);
}
else if (what == XamlPseudoType.Null)
{
if (to.IsValueType)
{
if (to.GenericTypeDefinition?.Equals(context.Configuration.WellKnownTypes.NullableT) == true)
{
using (var loc = context.GetLocalOfType(to))
ld(false)
.Pop()
.Ldloca(loc.Local)
.Emit(OpCodes.Initobj, to)
.Ldloc(loc.Local);
}
else
{
throw new XamlLoadException("Unable to convert {x:Null} to " + to.GetFqn(), node);
}
}
else
{
ld(false);
}
}
else if (what.IsValueType && to.IsValueType)
{
if (to.IsNullableOf(what))
{
ld(false).Emit(OpCodes.Newobj,
to.Constructors.First(c =>
c.Parameters.Count == 1 && c.Parameters[0].Equals(what)));
}
else if (what.IsNullableOf(what))
{
ld(true)
.EmitCall(what.FindMethod(m => m.Name == "get_Value"));
}
else
{
throw new XamlLoadException(
$"Don't know how to convert value type {what.GetFullName()} to value type {to.GetFullName()}",
node);
}
}
else if (!to.IsValueType && what.IsValueType)
{
if (!to.IsAssignableFrom(what))
{
throw new XamlLoadException(
$"Don't know how to convert value type {what.GetFullName()} to reference type {to.GetFullName()}",
node);
}
ld(false).Box(what);
}
else if (to.IsValueType && !what.IsValueType)
{
if (!(what.Namespace == "System" && what.Name == "Object"))
{
throw new XamlLoadException(
$"Don't know how to convert reference type {what.GetFullName()} to value type {to.GetFullName()}",
node);
}
ld(false).Unbox_Any(to);
}
else
{
if (to.IsAssignableFrom(what))
{
// Downcast, always safe
ld(false);
}
else if (what.IsInterface || what.IsAssignableFrom(to))
{
// Upcast or cast from interface, might throw InvalidCastException
ld(false).Emit(OpCodes.Castclass, to);
}
else
{
// Types are completely unrelated, e. g. string to List<int> conversion attempt
throw new XamlLoadException(
$"Don't know how to convert reference type {what.GetFullName()} to reference type {to.GetFullName()}",
node);
}
}
}
