IXamlType EmitTypeDescriptorContextStub(IXamlTypeSystem typeSystem, IXamlTypeBuilder <IXamlILEmitter> builder,
XamlLanguageTypeMappings mappings)
{
if (mappings.TypeDescriptorContext == null)
{
return(null);
}
var tdc = mappings.TypeDescriptorContext;
var tdcPrefix = tdc.Namespace + "." + tdc.Name + ".";
builder.AddInterfaceImplementation(mappings.TypeDescriptorContext);
void PropertyStub(string name) => ImplementInterfacePropertyGetter(builder, tdc, name).Generator.Ldnull().Ret();
PropertyStub("Container");
PropertyStub("Instance");
PropertyStub("PropertyDescriptor");
void MethodStub(string name)
{
var original = tdc.FindMethod(m => m.Name == name);
builder.DefineMethod(original.ReturnType, original.Parameters, tdcPrefix + name,
false, false, true,
original)
.Generator
.Emit(OpCodes.Newobj,
typeSystem.FindType("System.NotSupportedException").FindConstructor(new List <IXamlType>()))
.Emit(OpCodes.Throw);
}
MethodStub("OnComponentChanging");
MethodStub("OnComponentChanged");
return(mappings.TypeDescriptorContext);
}
public static (XamlLanguageTypeMappings language, XamlLanguageEmitMappings <IXamlILEmitter, XamlILNodeEmitResult> emit) Configure(IXamlTypeSystem typeSystem)
{
var runtimeHelpers = typeSystem.GetType("Avalonia.Markup.Xaml.XamlIl.Runtime.XamlIlRuntimeHelpers");
var assignBindingAttribute = typeSystem.GetType("Avalonia.Data.AssignBindingAttribute");
var bindingType = typeSystem.GetType("Avalonia.Data.IBinding");
var rv = new XamlLanguageTypeMappings(typeSystem)
{
SupportInitialize = typeSystem.GetType("System.ComponentModel.ISupportInitialize"),
XmlnsAttributes =
{
typeSystem.GetType("Avalonia.Metadata.XmlnsDefinitionAttribute"),
},
ContentAttributes =
{
typeSystem.GetType("Avalonia.Metadata.ContentAttribute")
},
WhitespaceSignificantCollectionAttributes =
{
typeSystem.GetType("Avalonia.Metadata.WhitespaceSignificantCollectionAttribute")
},
TrimSurroundingWhitespaceAttributes =
{
typeSystem.GetType("Avalonia.Metadata.TrimSurroundingWhitespaceAttribute")
},
ProvideValueTarget = typeSystem.GetType("Avalonia.Markup.Xaml.IProvideValueTarget"),
RootObjectProvider = typeSystem.GetType("Avalonia.Markup.Xaml.IRootObjectProvider"),
RootObjectProviderIntermediateRootPropertyName = "IntermediateRootObject",
UriContextProvider = typeSystem.GetType("Avalonia.Markup.Xaml.IUriContext"),
ParentStackProvider =
typeSystem.GetType("Avalonia.Markup.Xaml.XamlIl.Runtime.IAvaloniaXamlIlParentStackProvider"),
XmlNamespaceInfoProvider =
typeSystem.GetType("Avalonia.Markup.Xaml.XamlIl.Runtime.IAvaloniaXamlIlXmlNamespaceInfoProvider"),
DeferredContentPropertyAttributes = { typeSystem.GetType("Avalonia.Metadata.TemplateContentAttribute") },
DeferredContentExecutorCustomizationDefaultTypeParameter = typeSystem.GetType("Avalonia.Controls.IControl"),
DeferredContentExecutorCustomizationTypeParameterDeferredContentAttributePropertyNames = new List <string>
{
"TemplateResultType"
},
DeferredContentExecutorCustomization =
runtimeHelpers.FindMethod(m => m.Name == "DeferredTransformationFactoryV2"),
UsableDuringInitializationAttributes =
{
typeSystem.GetType("Avalonia.Metadata.UsableDuringInitializationAttribute"),
},
InnerServiceProviderFactoryMethod =
runtimeHelpers.FindMethod(m => m.Name == "CreateInnerServiceProviderV1"),
};
rv.CustomAttributeResolver = new AttributeResolver(typeSystem, rv);
var emit = new XamlLanguageEmitMappings <IXamlILEmitter, XamlILNodeEmitResult>
{
ProvideValueTargetPropertyEmitter = XamlIlAvaloniaPropertyHelper.EmitProvideValueTarget,
ContextTypeBuilderCallback = (b, c) => EmitNameScopeField(rv, typeSystem, b, c)
};
return(rv, emit);
}
private static void EmitNameScopeField(XamlLanguageTypeMappings xamlLanguage, CecilTypeSystem typeSystem, IXamlTypeBuilder <IXamlILEmitter> typeBuilder, IXamlILEmitter constructor)
{
var nameScopeType = typeSystem.FindType("Robust.Client.UserInterface.XAML.NameScope");
var field = typeBuilder.DefineField(nameScopeType,
ContextNameScopeFieldName, true, false);
constructor
.Ldarg_0()
.Newobj(nameScopeType.GetConstructor())
.Stfld(field);
}
public AvaloniaXamlIlCompilerConfiguration(IXamlTypeSystem typeSystem,
IXamlAssembly defaultAssembly,
XamlLanguageTypeMappings typeMappings,
XamlXmlnsMappings xmlnsMappings,
XamlValueConverter customValueConverter,
XamlIlClrPropertyInfoEmitter clrPropertyEmitter,
XamlIlPropertyInfoAccessorFactoryEmitter accessorFactoryEmitter)
: base(typeSystem, defaultAssembly, typeMappings, xmlnsMappings, customValueConverter)
{
ClrPropertyEmitter = clrPropertyEmitter;
AccessorFactoryEmitter = accessorFactoryEmitter;
AddExtra(ClrPropertyEmitter);
AddExtra(AccessorFactoryEmitter);
}
private static void EmitNameScopeField(XamlLanguageTypeMappings mappings,
IXamlTypeSystem typeSystem,
IXamlTypeBuilder <IXamlILEmitter> typebuilder, IXamlILEmitter constructor)
{
var nameScopeType = typeSystem.FindType("Avalonia.Controls.INameScope");
var field = typebuilder.DefineField(nameScopeType,
ContextNameScopeFieldName, true, false);
constructor
.Ldarg_0()
.Ldarg(1)
.Ldtype(nameScopeType)
.EmitCall(mappings.ServiceProvider.GetMethod(new FindMethodMethodSignature("GetService",
typeSystem.FindType("System.Object"), typeSystem.FindType("System.Type"))))
.Stfld(field);
}
public static MiniCompiler CreateDefault(RoslynTypeSystem typeSystem, params string[] additionalTypes)
{
var mappings = new XamlLanguageTypeMappings(typeSystem);
foreach (var additionalType in additionalTypes)
{
mappings.XmlnsAttributes.Add(typeSystem.GetType(additionalType));
}
var configuration = new TransformerConfiguration(
typeSystem,
typeSystem.Assemblies[0],
mappings);
return(new MiniCompiler(configuration));
}
internal static (XamlLanguageTypeMappings, XamlLanguageEmitMappings <TBackendEmitter, TEmitResult>) Configure <TBackendEmitter, TEmitResult>(CecilTypeSystem typeSystem)
where TEmitResult : IXamlEmitResult
{
var langaugeMappings = new XamlLanguageTypeMappings(typeSystem, useDefault: false)
{
ServiceProvider = typeSystem.GetType("Microsoft.UI.Xaml.IXamlServiceProvider"),
ContentAttributes =
{
typeSystem.GetType("Microsoft.UI.Xaml.Markup.ContentPropertyAttribute"),
typeSystem.GetType("Windows.UI.Xaml.Markup.ContentPropertyAttribute"),
}
};
var emitMappings = new XamlLanguageEmitMappings <TBackendEmitter, TEmitResult>();
return(langaugeMappings, emitMappings);
}
public AttributeResolver(IXamlTypeSystem typeSystem, XamlLanguageTypeMappings mappings)
{
_typeConverterAttribute = mappings.TypeConverterAttributes.First();
void AddType(IXamlType type, IXamlType conv)
=> _converters.Add(new KeyValuePair <IXamlType, IXamlType>(type, conv));
void Add(string type, string conv)
=> AddType(typeSystem.GetType(type), typeSystem.GetType(conv));
Add("Avalonia.Media.IImage", "Avalonia.Markup.Xaml.Converters.BitmapTypeConverter");
Add("Avalonia.Media.Imaging.IBitmap", "Avalonia.Markup.Xaml.Converters.BitmapTypeConverter");
var ilist = typeSystem.GetType("System.Collections.Generic.IList`1");
AddType(ilist.MakeGenericType(typeSystem.GetType("Avalonia.Point")),
typeSystem.GetType("Avalonia.Markup.Xaml.Converters.PointsListTypeConverter"));
Add("Avalonia.Controls.WindowIcon", "Avalonia.Markup.Xaml.Converters.IconTypeConverter");
Add("System.Globalization.CultureInfo", "System.ComponentModel.CultureInfoConverter");
Add("System.Uri", "Avalonia.Markup.Xaml.Converters.AvaloniaUriTypeConverter");
Add("System.TimeSpan", "Avalonia.Markup.Xaml.Converters.TimeSpanTypeConverter");
Add("Avalonia.Media.FontFamily", "Avalonia.Markup.Xaml.Converters.FontFamilyTypeConverter");
_avaloniaList = typeSystem.GetType("Avalonia.Collections.AvaloniaList`1");
_avaloniaListConverter = typeSystem.GetType("Avalonia.Collections.AvaloniaListConverter`1");
}
static bool?CompileCore(IBuildEngine engine, CecilTypeSystem typeSystem)
{
var asm = typeSystem.TargetAssemblyDefinition;
var embrsc = new EmbeddedResources(asm);
if (embrsc.Resources.Count(CheckXamlName) == 0)
{
// Nothing to do
return(null);
}
var xamlLanguage = new XamlLanguageTypeMappings(typeSystem)
{
XmlnsAttributes =
{
typeSystem.GetType("Avalonia.Metadata.XmlnsDefinitionAttribute"),
},
ContentAttributes =
{
typeSystem.GetType("Robust.Client.UserInterface.XAML.ContentAttribute")
},
UsableDuringInitializationAttributes =
{
typeSystem.GetType("Robust.Client.UserInterface.XAML.UsableDuringInitializationAttribute")
},
DeferredContentPropertyAttributes =
{
typeSystem.GetType("Robust.Client.UserInterface.XAML.DeferredContentAttribute")
},
RootObjectProvider = typeSystem.GetType("Robust.Client.UserInterface.XAML.ITestRootObjectProvider"),
UriContextProvider = typeSystem.GetType("Robust.Client.UserInterface.XAML.ITestUriContext"),
ProvideValueTarget = typeSystem.GetType("Robust.Client.UserInterface.XAML.ITestProvideValueTarget"),
};
var emitConfig = new XamlLanguageEmitMappings <IXamlILEmitter, XamlILNodeEmitResult>
{
ContextTypeBuilderCallback = (b, c) => EmitNameScopeField(xamlLanguage, typeSystem, b, c)
};
var transformerconfig = new TransformerConfiguration(
typeSystem,
typeSystem.TargetAssembly,
xamlLanguage,
XamlXmlnsMappings.Resolve(typeSystem, xamlLanguage), CustomValueConverter);
var contextDef = new TypeDefinition("CompiledRobustXaml", "XamlIlContext",
TypeAttributes.Class, asm.MainModule.TypeSystem.Object);
asm.MainModule.Types.Add(contextDef);
var contextClass = XamlILContextDefinition.GenerateContextClass(typeSystem.CreateTypeBuilder(contextDef), typeSystem,
xamlLanguage, emitConfig);
var compiler =
new RobustXamlILCompiler(transformerconfig, emitConfig, true);
var loaderDispatcherDef = new TypeDefinition("CompiledRobustXaml", "!XamlLoader",
TypeAttributes.Class, asm.MainModule.TypeSystem.Object);
var loaderDispatcherMethod = new MethodDefinition("TryLoad",
MethodAttributes.Static | MethodAttributes.Public,
asm.MainModule.TypeSystem.Object)
{
Parameters = { new ParameterDefinition(asm.MainModule.TypeSystem.String) }
};
loaderDispatcherDef.Methods.Add(loaderDispatcherMethod);
asm.MainModule.Types.Add(loaderDispatcherDef);
var stringEquals = asm.MainModule.ImportReference(asm.MainModule.TypeSystem.String.Resolve().Methods.First(
m =>
m.IsStatic && m.Name == "Equals" && m.Parameters.Count == 2 &&
m.ReturnType.FullName == "System.Boolean" &&
m.Parameters[0].ParameterType.FullName == "System.String" &&
m.Parameters[1].ParameterType.FullName == "System.String"));
bool CompileGroup(IResourceGroup group)
{
var typeDef = new TypeDefinition("CompiledRobustXaml", "!" + group.Name, TypeAttributes.Class,
asm.MainModule.TypeSystem.Object);
//typeDef.CustomAttributes.Add(new CustomAttribute(ed));
asm.MainModule.Types.Add(typeDef);
var builder = typeSystem.CreateTypeBuilder(typeDef);
foreach (var res in group.Resources.Where(CheckXamlName))
{
try
{
engine.LogMessage($"XAMLIL: {res.Name} -> {res.Uri}", MessageImportance.Low);
var xaml = new StreamReader(new MemoryStream(res.FileContents)).ReadToEnd();
var parsed = XDocumentXamlParser.Parse(xaml);
var initialRoot = (XamlAstObjectNode)parsed.Root;
var classDirective = initialRoot.Children.OfType <XamlAstXmlDirective>()
.FirstOrDefault(d => d.Namespace == XamlNamespaces.Xaml2006 && d.Name == "Class");
string classname;
if (classDirective != null && classDirective.Values[0] is XamlAstTextNode tn)
{
classname = tn.Text;
}
else
{
classname = res.Name.Replace(".xaml", "");
}
var classType = typeSystem.TargetAssembly.FindType(classname);
if (classType == null)
{
throw new Exception($"Unable to find type '{classname}'");
}
compiler.Transform(parsed);
var populateName = $"Populate:{res.Name}";
var buildName = $"Build:{res.Name}";
var classTypeDefinition = typeSystem.GetTypeReference(classType).Resolve();
var populateBuilder = typeSystem.CreateTypeBuilder(classTypeDefinition);
compiler.Compile(parsed, contextClass,
compiler.DefinePopulateMethod(populateBuilder, parsed, populateName,
classTypeDefinition == null),
compiler.DefineBuildMethod(builder, parsed, buildName, true),
null,
(closureName, closureBaseType) =>
populateBuilder.DefineSubType(closureBaseType, closureName, false),
res.Uri, res
);
//add compiled populate method
var compiledPopulateMethod = typeSystem.GetTypeReference(populateBuilder).Resolve().Methods
.First(m => m.Name == populateName);
const string TrampolineName = "!XamlIlPopulateTrampoline";
var trampoline = new MethodDefinition(TrampolineName,
MethodAttributes.Static | MethodAttributes.Private, asm.MainModule.TypeSystem.Void);
trampoline.Parameters.Add(new ParameterDefinition(classTypeDefinition));
classTypeDefinition.Methods.Add(trampoline);
trampoline.Body.Instructions.Add(Instruction.Create(OpCodes.Ldnull));
trampoline.Body.Instructions.Add(Instruction.Create(OpCodes.Ldarg_0));
trampoline.Body.Instructions.Add(Instruction.Create(OpCodes.Call, compiledPopulateMethod));
trampoline.Body.Instructions.Add(Instruction.Create(OpCodes.Ret));
var foundXamlLoader = false;
// Find RobustXamlLoader.Load(this) and replace it with !XamlIlPopulateTrampoline(this)
foreach (var method in classTypeDefinition.Methods
.Where(m => !m.Attributes.HasFlag(MethodAttributes.Static)))
{
var i = method.Body.Instructions;
for (var c = 1; c < i.Count; c++)
{
if (i[c].OpCode == OpCodes.Call)
{
var op = i[c].Operand as MethodReference;
if (op != null &&
op.Name == TrampolineName)
{
foundXamlLoader = true;
break;
}
if (op != null &&
op.Name == "Load" &&
op.Parameters.Count == 1 &&
op.Parameters[0].ParameterType.FullName == "System.Object" &&
op.DeclaringType.FullName == "Robust.Client.UserInterface.XAML.RobustXamlLoader")
{
if (MatchThisCall(i, c - 1))
{
i[c].Operand = trampoline;
foundXamlLoader = true;
}
}
}
}
}
if (!foundXamlLoader)
{
var ctors = classTypeDefinition.GetConstructors()
.Where(c => !c.IsStatic).ToList();
// We can inject xaml loader into default constructor
if (ctors.Count == 1 && ctors[0].Body.Instructions.Count(o => o.OpCode != OpCodes.Nop) == 3)
{
var i = ctors[0].Body.Instructions;
var retIdx = i.IndexOf(i.Last(x => x.OpCode == OpCodes.Ret));
i.Insert(retIdx, Instruction.Create(OpCodes.Call, trampoline));
i.Insert(retIdx, Instruction.Create(OpCodes.Ldarg_0));
}
else
{
throw new InvalidProgramException(
$"No call to RobustXamlLoader.Load(this) call found anywhere in the type {classType.FullName} and type seems to have custom constructors.");
}
}
//add compiled build method
var compiledBuildMethod = typeSystem.GetTypeReference(builder).Resolve().Methods
.First(m => m.Name == buildName);
var parameterlessCtor = classTypeDefinition.GetConstructors()
.FirstOrDefault(c => c.IsPublic && !c.IsStatic && !c.HasParameters);
if (compiledBuildMethod != null && parameterlessCtor != null)
{
var i = loaderDispatcherMethod.Body.Instructions;
var nop = Instruction.Create(OpCodes.Nop);
i.Add(Instruction.Create(OpCodes.Ldarg_0));
i.Add(Instruction.Create(OpCodes.Ldstr, res.Uri));
i.Add(Instruction.Create(OpCodes.Call, stringEquals));
i.Add(Instruction.Create(OpCodes.Brfalse, nop));
if (parameterlessCtor != null)
{
i.Add(Instruction.Create(OpCodes.Newobj, parameterlessCtor));
}
else
{
i.Add(Instruction.Create(OpCodes.Call, compiledBuildMethod));
}
i.Add(Instruction.Create(OpCodes.Ret));
i.Add(nop);
}
}
catch (Exception e)
{
engine.LogErrorEvent(new BuildErrorEventArgs("XAMLIL", "", res.FilePath, 0, 0, 0, 0,
$"{res.FilePath}: {e.Message}", "", "CompileRobustXaml"));
}
}
return(true);
}
if (embrsc.Resources.Count(CheckXamlName) != 0)
{
if (!CompileGroup(embrsc))
{
return(false);
}
}
loaderDispatcherMethod.Body.Instructions.Add(Instruction.Create(OpCodes.Ldnull));
loaderDispatcherMethod.Body.Instructions.Add(Instruction.Create(OpCodes.Ret));
return(true);
}
private XamlILContextDefinition(IXamlTypeBuilder <IXamlILEmitter> parentBuilder,
IXamlTypeSystem typeSystem, XamlLanguageTypeMappings mappings,
XamlLanguageEmitMappings <IXamlILEmitter, XamlILNodeEmitResult> emitMappings)
{
var so = typeSystem.GetType("System.Object");
var builder = parentBuilder.DefineSubType(so, "Context", true);
builder.DefineGenericParameters(new[]
{
new KeyValuePair <string, XamlGenericParameterConstraint>("TTarget",
new XamlGenericParameterConstraint
{
IsClass = true
})
});
var rootObjectField = builder.DefineField(builder.GenericParameters[0], "RootObject", true, false);
var intermediateRootObjectField = builder.DefineField(so, XamlRuntimeContextDefintion.IntermediateRootObjectFieldName, true, false);
_parentServiceProviderField = builder.DefineField(mappings.ServiceProvider, "_sp", false, false);
if (mappings.InnerServiceProviderFactoryMethod != null)
{
_innerServiceProviderField = builder.DefineField(mappings.ServiceProvider, "_innerSp", false, false);
}
var staticProvidersField = builder.DefineField(typeSystem.GetType("System.Object").MakeArrayType(1),
"_staticProviders", false, false);
var systemType = typeSystem.GetType("System.Type");
var systemUri = typeSystem.GetType("System.Uri");
var systemString = typeSystem.GetType("System.String");
var getServiceInterfaceMethod = mappings.ServiceProvider.FindMethod("GetService", so, false, systemType);
var ownServices = new List <IXamlType>();
var ctorCallbacks = new List <Action <IXamlILEmitter> >();
if (mappings.RootObjectProvider != null)
{
builder.AddInterfaceImplementation(mappings.RootObjectProvider);
var rootGen = ImplementInterfacePropertyGetter(builder, mappings.RootObjectProvider, XamlRuntimeContextDefintion.RootObjectFieldName)
.Generator;
var tryParent = rootGen.DefineLabel();
var fail = rootGen.DefineLabel();
var parentRootProvider = rootGen.DefineLocal(mappings.RootObjectProvider);
rootGen
// if(RootObject!=null) return RootObject;
.LdThisFld(rootObjectField)
.Box(rootObjectField.FieldType)
.Brfalse(tryParent)
.LdThisFld(rootObjectField)
.Box(rootObjectField.FieldType)
.Ret()
// if(_sp == null) goto fail;
.MarkLabel(tryParent)
.LdThisFld(_parentServiceProviderField)
.Brfalse(fail)
// parentProv = (IRootObjectProvider)_sp.GetService(typeof(IRootObjectProvider));
.LdThisFld(_parentServiceProviderField)
.Ldtype(mappings.RootObjectProvider)
.EmitCall(getServiceInterfaceMethod)
.Castclass(mappings.RootObjectProvider)
.Stloc(parentRootProvider)
// if(parentProv == null) goto fail;
.Ldloc(parentRootProvider)
.Brfalse(fail)
// return parentProv.Root;
.Ldloc(parentRootProvider)
.EmitCall(mappings.RootObjectProvider.FindMethod(m => m.Name == "get_RootObject"))
.Ret()
// fail:
.MarkLabel(fail)
.Ldnull()
.Ret();
if (mappings.RootObjectProviderIntermediateRootPropertyName != null)
{
ImplementInterfacePropertyGetter(builder, mappings.RootObjectProvider, mappings.RootObjectProviderIntermediateRootPropertyName)
.Generator
.LdThisFld(intermediateRootObjectField)
.Ret();
}
ownServices.Add(mappings.RootObjectProvider);
}
if (mappings.ParentStackProvider != null)
{
builder.AddInterfaceImplementation(mappings.ParentStackProvider);
var objectListType = typeSystem.GetType("System.Collections.Generic.List`1")
.MakeGenericType(new[] { typeSystem.GetType("System.Object") });
ParentListField = builder.DefineField(objectListType, XamlRuntimeContextDefintion.ParentListFieldName, true, false);
var enumerator = EmitParentEnumerable(typeSystem, parentBuilder, mappings);
CreateCallbacks.Add(enumerator.createCallback);
var parentStackEnumerableField = builder.DefineField(
typeSystem.GetType("System.Collections.Generic.IEnumerable`1").MakeGenericType(new[] { so }),
"_parentStackEnumerable", false, false);
ImplementInterfacePropertyGetter(builder, mappings.ParentStackProvider, "Parents")
.Generator.LdThisFld(parentStackEnumerableField).Ret();
ctorCallbacks.Add(g => g
.Emit(OpCodes.Ldarg_0)
.Emit(OpCodes.Newobj, objectListType.FindConstructor(new List <IXamlType>()))
.Emit(OpCodes.Stfld, ParentListField)
.Emit(OpCodes.Ldarg_0)
.LdThisFld(ParentListField)
.LdThisFld(_parentServiceProviderField)
.Emit(OpCodes.Newobj, enumerator.ctor)
.Emit(OpCodes.Stfld, parentStackEnumerableField));
ownServices.Add(mappings.ParentStackProvider);
}
ownServices.Add(EmitTypeDescriptorContextStub(typeSystem, builder, mappings));
if (mappings.ProvideValueTarget != null)
{
builder.AddInterfaceImplementation(mappings.ProvideValueTarget);
PropertyTargetObject = builder.DefineField(so, XamlRuntimeContextDefintion.ProvideTargetObjectName, true, false);
PropertyTargetProperty = builder.DefineField(so, XamlRuntimeContextDefintion.ProvideTargetPropertyName, true, false);
ImplementInterfacePropertyGetter(builder, mappings.ProvideValueTarget, "TargetObject")
.Generator.LdThisFld(PropertyTargetObject).Ret();
ImplementInterfacePropertyGetter(builder, mappings.ProvideValueTarget, "TargetProperty")
.Generator.LdThisFld(PropertyTargetProperty).Ret();
ownServices.Add(mappings.ProvideValueTarget);
}
IXamlField baseUriField = null;
if (mappings.UriContextProvider != null)
{
baseUriField = builder.DefineField(systemUri, "_baseUri", false, false);
builder.AddInterfaceImplementation(mappings.UriContextProvider);
var getter = builder.DefineMethod(systemUri, new IXamlType[0], "get_BaseUri", true, false, true);
var setter = builder.DefineMethod(typeSystem.GetType("System.Void"), new[] { systemUri },
"set_BaseUri", true, false, true);
getter.Generator
.LdThisFld(baseUriField)
.Ret();
setter.Generator
.Ldarg_0()
.Ldarg(1)
.Stfld(baseUriField)
.Ret();
builder.DefineProperty(systemUri, "BaseUri", setter, getter);
ownServices.Add(mappings.UriContextProvider);
}
builder.AddInterfaceImplementation(mappings.ServiceProvider);
var getServiceMethod = builder.DefineMethod(so,
new[] { systemType },
"GetService", true, false, true);
ownServices = ownServices.Where(s => s != null).ToList();
if (_innerServiceProviderField != null)
{
var next = getServiceMethod.Generator.DefineLabel();
var innerResult = getServiceMethod.Generator.DefineLocal(so);
getServiceMethod.Generator
//if(_inner == null) goto next;
.LdThisFld(_innerServiceProviderField)
.Brfalse(next)
// var innerRes = _inner.GetService(type);
.LdThisFld(_innerServiceProviderField)
.Ldarg(1)
.EmitCall(getServiceInterfaceMethod)
.Stloc(innerResult)
// if(innerRes == null) goto next;
.Ldloc(innerResult)
.Brfalse(next)
// return innerRes
.Ldloc(innerResult)
.Ret()
.MarkLabel(next);
}
var compare = systemType.FindMethod("Equals", typeSystem.GetType("System.Boolean"),
false, systemType);
var isAssignableFrom = systemType.FindMethod("IsAssignableFrom", typeSystem.GetType("System.Boolean"),
false, systemType);
var fromHandle = systemType.Methods.First(m => m.Name == "GetTypeFromHandle");
var getTypeFromObject = so.Methods.First(m => m.Name == "GetType" && m.Parameters.Count == 0);
if (ownServices.Count != 0)
{
for (var c = 0; c < ownServices.Count; c++)
{
var next = getServiceMethod.Generator.DefineLabel();
getServiceMethod.Generator
.Emit(OpCodes.Ldtoken, ownServices[c])
.EmitCall(fromHandle)
.Emit(OpCodes.Ldarg_1)
.Emit(OpCodes.Callvirt, compare)
.Emit(OpCodes.Brfalse, next)
.Emit(OpCodes.Ldarg_0)
.Emit(OpCodes.Ret)
.MarkLabel(next);
}
}
var staticProviderIndex = getServiceMethod.Generator.DefineLocal(typeSystem.GetType("System.Int32"));
var staticProviderNext = getServiceMethod.Generator.DefineLabel();
var staticProviderFailed = getServiceMethod.Generator.DefineLabel();
var staticProviderEnd = getServiceMethod.Generator.DefineLabel();
var staticProviderElement = getServiceMethod.Generator.DefineLocal(so);
getServiceMethod.Generator
//start: if(_staticProviders == null) goto: end
.LdThisFld(staticProvidersField)
.Brfalse(staticProviderEnd)
// var c = 0
.Ldc_I4(0)
.Stloc(staticProviderIndex)
// next:
.MarkLabel(staticProviderNext)
// if(c >= _staticProviders.Length) goto: end
.Ldloc(staticProviderIndex)
.LdThisFld(staticProvidersField)
.Ldlen()
.Bge(staticProviderEnd)
// var obj = _staticProviders[c]
.LdThisFld(staticProvidersField)
.Ldloc(staticProviderIndex)
.Ldelem_ref()
// dup
.Stloc(staticProviderElement)
.Ldarg(1)
.Ldloc(staticProviderElement)
// if(obj.GetType().Equals(arg1)) return obj; else goto failed;
.EmitCall(getTypeFromObject)
.EmitCall(isAssignableFrom)
.Brfalse(staticProviderFailed)
.Ldloc(staticProviderElement)
.Ret()
// failed:
.MarkLabel(staticProviderFailed)
// c++
.Ldloc(staticProviderIndex)
.Ldc_I4(1)
.Add()
.Stloc(staticProviderIndex)
// goto: start
.Br(staticProviderNext)
// end:
.MarkLabel(staticProviderEnd);
var noParentProvider = getServiceMethod.Generator.DefineLabel();
getServiceMethod.Generator
.LdThisFld(_parentServiceProviderField)
.Brfalse(noParentProvider)
.LdThisFld(_parentServiceProviderField)
.Ldarg(1)
.EmitCall(getServiceInterfaceMethod)
.Emit(OpCodes.Ret)
.MarkLabel(noParentProvider)
.Ldnull()
.Ret();
var ctor = builder.DefineConstructor(false,
mappings.ServiceProvider,
staticProvidersField.FieldType,
systemString);
ctor.Generator
.Emit(OpCodes.Ldarg_0)
.Emit(OpCodes.Call, so.Constructors.First())
.Emit(OpCodes.Ldarg_0)
.Emit(OpCodes.Ldarg_1)
.Emit(OpCodes.Stfld, _parentServiceProviderField)
.Emit(OpCodes.Ldarg_0)
.Emit(OpCodes.Ldarg_2)
.Emit(OpCodes.Stfld, staticProvidersField);
if (baseUriField != null)
{
var noUri = ctor.Generator.DefineLabel();
ctor.Generator
.Emit(OpCodes.Ldarg_3)
.Brfalse(noUri)
.Emit(OpCodes.Ldarg_0)
.Emit(OpCodes.Ldarg_3)
.Newobj(systemUri.FindConstructor(new List <IXamlType>
{
typeSystem.GetType("System.String")
}))
.Emit(OpCodes.Stfld, baseUriField)
.MarkLabel(noUri);
}
foreach (var feature in ctorCallbacks)
{
feature(ctor.Generator);
}
emitMappings.ContextTypeBuilderCallback?.Invoke(builder, ctor.Generator);
// We are calling this last to ensure that our own services are ready
if (_innerServiceProviderField != null)
{
ctor.Generator
// _innerSp = InnerServiceProviderFactory(this)
.Ldarg_0()
.Ldarg_0()
.EmitCall(mappings.InnerServiceProviderFactoryMethod)
.Stfld(_innerServiceProviderField);
}
ctor.Generator.Emit(OpCodes.Ret);
Constructor = ctor;
CreateCallbacks.Add(() => { parentBuilder.CreateType(); });
if (ParentListField != null)
{
EmitPushPopParent(builder, typeSystem);
}
CreateAllTypes();
ContextType = builder.CreateType();
}
public static IXamlType GenerateContextClass(IXamlTypeBuilder <IXamlILEmitter> builder,
IXamlTypeSystem typeSystem, XamlLanguageTypeMappings mappings,
XamlLanguageEmitMappings <IXamlILEmitter, XamlILNodeEmitResult> emitMappings)
{
return(new XamlILContextDefinition(builder, typeSystem, mappings, emitMappings).ContextType);
}
