IXamlIlType EmitTypeDescriptorContextStub(IXamlIlTypeSystem typeSystem, IXamlIlTypeBuilder builder,
XamlIlLanguageTypeMappings 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 <IXamlIlType>()))
.Emit(OpCodes.Throw);
}
MethodStub("OnComponentChanging");
MethodStub("OnComponentChanged");
return(mappings.TypeDescriptorContext);
}
public XamlIlContext(IXamlIlType definition, IXamlIlType constructedType,
XamlIlLanguageTypeMappings mappings,
string baseUri, List <IXamlIlField> staticProviders) : this(definition, constructedType, mappings,
(context, codegen) =>
{
if (staticProviders?.Count > 0)
{
var so = codegen.TypeSystem.GetType("System.Object");
codegen.Ldc_I4(staticProviders.Count)
.Newarr(so);
for (var c = 0; c < staticProviders.Count; c++)
{
codegen
.Dup()
.Ldc_I4(c)
.Ldsfld(staticProviders[c])
.Castclass(so)
.Stelem_ref();
}
}
else
{
codegen.Ldnull();
}
codegen.Ldstr(baseUri)
.Newobj(context.Constructor);
})
{
}
public XamlIlContext(IXamlIlType definition, IXamlIlType constructedType,
XamlIlLanguageTypeMappings mappings,
Action <XamlIlContext, IXamlIlEmitter> factory)
{
ContextType = definition.MakeGenericType(constructedType);
IXamlIlField Get(string s) =>
ContextType.Fields.FirstOrDefault(f => f.Name == s);
IXamlIlMethod GetMethod(string s) =>
ContextType.Methods.FirstOrDefault(f => f.Name == s);
RootObjectField = Get(XamlIlContextDefinition.RootObjectFieldName);
IntermediateRootObjectField = Get(XamlIlContextDefinition.IntermediateRootObjectFieldName);
ParentListField = Get(XamlIlContextDefinition.ParentListFieldName);
PropertyTargetObject = Get(XamlIlContextDefinition.ProvideTargetObjectName);
PropertyTargetProperty = Get(XamlIlContextDefinition.ProvideTargetPropertyName);
PushParentMethod = GetMethod(XamlIlContextDefinition.PushParentMethodName);
PopParentMethod = GetMethod(XamlIlContextDefinition.PopParentMethodName);
Constructor = ContextType.Constructors.First();
Factory = il => factory(this, il);
if (mappings.ContextFactoryCallback != null)
{
Factory = il =>
{
factory(this, il);
mappings.ContextFactoryCallback(this, il);
}
}
;
}
private XamlIlContextDefinition(IXamlIlTypeBuilder parentBuilder,
IXamlIlTypeSystem typeSystem, XamlIlLanguageTypeMappings mappings)
{
var so = typeSystem.GetType("System.Object");
var builder = parentBuilder.DefineSubType(so, "Context", true);
builder.DefineGenericParameters(new[]
{
new KeyValuePair <string, XamlIlGenericParameterConstraint>("TTarget",
new XamlIlGenericParameterConstraint
{
IsClass = true
})
});
var rootObjectField = builder.DefineField(builder.GenericParameters[0], "RootObject", 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 <IXamlIlType>();
var ctorCallbacks = new List <Action <IXamlIlEmitter> >();
if (mappings.RootObjectProvider != null)
{
builder.AddInterfaceImplementation(mappings.RootObjectProvider);
var rootGen = ImplementInterfacePropertyGetter(builder, mappings.RootObjectProvider, 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();
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, 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 <IXamlIlType>()))
.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, ProvideTargetObjectName, true, false);
PropertyTargetProperty = builder.DefineField(so, 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);
}
IXamlIlField baseUriField = null;
if (mappings.UriContextProvider != null)
{
baseUriField = builder.DefineField(systemUri, "_baseUri", false, false);
builder.AddInterfaceImplementation(mappings.UriContextProvider);
var getter = builder.DefineMethod(systemUri, new IXamlIlType[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 <IXamlIlType>
{
typeSystem.GetType("System.String")
}))
.Emit(OpCodes.Stfld, baseUriField)
.MarkLabel(noUri);
}
foreach (var feature in ctorCallbacks)
{
feature(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(); });
EmitPushPopParent(builder, typeSystem);
CreateAllTypes();
ContextType = builder.CreateType();
}
public static IXamlIlType GenerateContextClass(IXamlIlTypeBuilder builder,
IXamlIlTypeSystem typeSystem, XamlIlLanguageTypeMappings mappings)
{
return(new XamlIlContextDefinition(builder, typeSystem, mappings).ContextType);
}
public static XamlIlContext GenerateContextClass(IXamlIlTypeBuilder builder,
IXamlIlTypeSystem typeSystem, XamlIlLanguageTypeMappings mappings,
IXamlIlType rootType)
{
var rootObjectField = builder.DefineField(rootType, "RootObject", true, false);
var so = typeSystem.GetType("System.Object");
var systemType = typeSystem.GetType("System.Type");
var runtimeType = typeSystem.GetType("System.RuntimeTypeHandle");
var ownServices = new List <IXamlIlType>();
if (mappings.RootObjectProvider != null)
{
builder.AddInterfaceImplementation(mappings.RootObjectProvider);
var getRootObject = builder.DefineMethod(so, new IXamlIlType[0],
"get_RootObject", true, false, true);
builder.DefineProperty(so, "RootObject", null, getRootObject);
getRootObject.Generator
.Emit(OpCodes.Ldarg_0)
.Emit(OpCodes.Ldfld, rootObjectField)
.Emit(OpCodes.Ret);
ownServices.Add(mappings.RootObjectProvider);
}
var spField = builder.DefineField(mappings.ServiceProvider, "_sp", false, false);
builder.AddInterfaceImplementation(mappings.ServiceProvider);
var getServiceMethod = builder.DefineMethod(so,
new[] { systemType },
"GetService", true, false, true);
if (ownServices.Count != 0)
{
var compare = systemType.FindMethod("Equals", typeSystem.GetType("System.Boolean"),
false, systemType);
var fromHandle = systemType.Methods.First(m => m.Name == "GetTypeFromHandle");
for (var c = 0; c < ownServices.Count; c++)
{
var next = getServiceMethod.Generator.DefineLabel();
getServiceMethod.Generator
.Emit(OpCodes.Ldtoken, ownServices[c])
.Emit(OpCodes.Call, fromHandle)
.Emit(OpCodes.Ldarg_1)
.Emit(OpCodes.Callvirt, compare)
.Emit(OpCodes.Brfalse, next)
.Emit(OpCodes.Ldarg_0)
.Emit(OpCodes.Ret)
.MarkLabel(next);
}
}
getServiceMethod.Generator
.Emit(OpCodes.Ldarg_0)
.Emit(OpCodes.Ldfld, spField)
.Emit(OpCodes.Ldarg_1)
.Emit(OpCodes.Callvirt, mappings.ServiceProvider.FindMethod("GetService", so, false, systemType))
.Emit(OpCodes.Ret);
var ctor = builder.DefineConstructor(mappings.ServiceProvider);
ctor.Generator
.Emit(OpCodes.Ldarg_0)
.Emit(OpCodes.Call, so.Constructors.First())
.Emit(OpCodes.Ldarg_0)
.Emit(OpCodes.Ldarg_1)
.Emit(OpCodes.Stfld, spField)
.Emit(OpCodes.Ret);
return(new XamlIlContext
{
Constructor = ctor,
RootObjectField = rootObjectField,
ContextType = builder.CreateType()
});
}
private XamlIlContext(IXamlIlTypeBuilder builder,
IXamlIlTypeSystem typeSystem, XamlIlLanguageTypeMappings mappings,
IXamlIlType rootType, IEnumerable <IXamlIlField> staticProviders, string baseUri)
{
RootObjectField = builder.DefineField(rootType, "RootObject", true, false);
_parentServiceProviderField = builder.DefineField(mappings.ServiceProvider, "_sp", false, false);
if (mappings.InnerServiceProviderFactoryMethod != null)
{
_innerServiceProviderField = builder.DefineField(mappings.ServiceProvider, "_innerSp", false, false);
}
var so = typeSystem.GetType("System.Object");
var systemType = typeSystem.GetType("System.Type");
var getServiceInterfaceMethod = mappings.ServiceProvider.FindMethod("GetService", so, false, systemType);
var ownServices = new List <IXamlIlType>();
var ctorCallbacks = new List <Action <IXamlIlEmitter> >();
if (mappings.RootObjectProvider != null)
{
builder.AddInterfaceImplementation(mappings.RootObjectProvider);
var rootGen = ImplementInterfacePropertyGetter(builder, mappings.RootObjectProvider, "RootObject")
.Generator;
var tryParent = rootGen.DefineLabel();
var fail = rootGen.DefineLabel();
var parentRootProvider = rootGen.DefineLocal(mappings.RootObjectProvider);
rootGen
// if(RootObject!=null) return RootObject;
.LdThisFld(RootObjectField)
.Brfalse(tryParent)
.LdThisFld(RootObjectField)
.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();
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, "ParentsStack", true, false);
var enumerator = EmitParentEnumerable(typeSystem, builder, mappings);
CreateCallbacks.Add(enumerator.createCallback);
_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 <IXamlIlType>()))
.Emit(OpCodes.Stfld, ParentListField)
.Emit(OpCodes.Ldarg_0)
.Emit(OpCodes.Ldarg_0)
.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, "ProvideTargetObject", true, false);
PropertyTargetProperty = builder.DefineField(so, "ProvideTargetProperty", true, false);
ImplementInterfacePropertyGetter(builder, mappings.ProvideValueTarget, "TargetObject")
.Generator.LdThisFld(PropertyTargetObject).Ret();
ImplementInterfacePropertyGetter(builder, mappings.ProvideValueTarget, "TargetProperty")
.Generator.LdThisFld(PropertyTargetProperty).Ret();
ownServices.Add(mappings.ProvideValueTarget);
}
if (mappings.UriContextProvider != null)
{
var systemUri = typeSystem.GetType("System.Uri");
var cached = builder.DefineField(systemUri, "_baseUri", false, false);
builder.AddInterfaceImplementation(mappings.UriContextProvider);
var getter = builder.DefineMethod(systemUri, new IXamlIlType[0], "get_BaseUri", true, false, true);
var setter = builder.DefineMethod(typeSystem.GetType("System.Void"), new[] { systemUri },
"set_BaseUri", true, false, true);
var noCache = getter.Generator.DefineLabel();
getter.Generator
.LdThisFld(cached)
.Brfalse(noCache)
.LdThisFld(cached)
.Ret()
.MarkLabel(noCache)
.Ldarg_0()
.Ldstr(baseUri)
.Newobj(systemUri.FindConstructor(new List <IXamlIlType>
{
typeSystem.GetType("System.String")
}))
.Stfld(cached)
.LdThisFld(cached)
.Ret();
setter.Generator
.Ldarg_0()
.Ldarg(1)
.Stfld(cached)
.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 fromHandle = systemType.Methods.First(m => m.Name == "GetTypeFromHandle");
if (ownServices.Count != 0)
{
for (var c = 0; c < ownServices.Count; c++)
{
var next = getServiceMethod.Generator.DefineLabel();
getServiceMethod.Generator
.Emit(OpCodes.Ldtoken, ownServices[c])
.Emit(OpCodes.Call, fromHandle)
.Emit(OpCodes.Ldarg_1)
.Emit(OpCodes.Callvirt, compare)
.Emit(OpCodes.Brfalse, next)
.Emit(OpCodes.Ldarg_0)
.Emit(OpCodes.Ret)
.MarkLabel(next);
}
}
if (staticProviders != null)
{
foreach (var sprov in staticProviders)
{
var next = getServiceMethod.Generator.DefineLabel();
getServiceMethod.Generator
.Ldtoken(sprov.FieldType)
.EmitCall(fromHandle)
.Ldarg(1)
.EmitCall(compare)
.Brfalse(next)
.Ldsfld(sprov)
.Ret()
.MarkLabel(next);
}
}
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);
ctor.Generator
.Emit(OpCodes.Ldarg_0)
.Emit(OpCodes.Call, so.Constructors.First())
.Emit(OpCodes.Ldarg_0)
.Emit(OpCodes.Ldarg_1)
.Emit(OpCodes.Stfld, _parentServiceProviderField);
foreach (var feature in ctorCallbacks)
{
feature(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(() => { ContextType = builder.CreateType(); });
ContextType = builder;
}
public static XamlIlContext GenerateContextClass(IXamlIlTypeBuilder builder,
IXamlIlTypeSystem typeSystem, XamlIlLanguageTypeMappings mappings,
IXamlIlType rootType, IEnumerable <IXamlIlField> staticProviders, string baseUri)
=> new XamlIlContext(builder, typeSystem, mappings, rootType, staticProviders, baseUri);