public void Visit(ElementNode node, INode parentNode)
{
XmlName propertyName = XmlName.Empty;
//Simplify ListNodes with single elements
var pList = parentNode as ListNode;
if (pList != null && pList.CollectionItems.Count == 1)
{
propertyName = pList.XmlName;
parentNode = parentNode.Parent;
}
//if this node is an IMarkupExtension, invoke ProvideValue() and replace the variable
var vardef = Context.Variables[node];
var vardefref = new VariableDefinitionReference(vardef);
Context.IL.Append(ProvideValue(vardefref, Context, Module, node));
if (vardef != vardefref.VariableDefinition)
{
vardef = vardefref.VariableDefinition;
Context.Body.Variables.Add(vardef);
Context.Variables[node] = vardef;
}
if (propertyName != XmlName.Empty || TryGetPropertyName(node, parentNode, out propertyName))
{
if (skips.Contains(propertyName))
{
return;
}
if (propertyName == XmlName._CreateContent)
{
SetDataTemplate((IElementNode)parentNode, node, Context, node);
}
else
{
Context.IL.Append(SetPropertyValue(Context.Variables[(IElementNode)parentNode], propertyName, node, Context, node));
}
}
else if (IsCollectionItem(node, parentNode) && parentNode is IElementNode)
{
// Collection element, implicit content, or implicit collection element.
string contentProperty;
var parentVar = Context.Variables[(IElementNode)parentNode];
if (parentVar.VariableType.ImplementsInterface(Module.Import(typeof(IEnumerable))))
{
var elementType = parentVar.VariableType;
if (elementType.FullName != "Xamarin.Forms.ResourceDictionary" && elementType.Resolve().BaseType.FullName != "Xamarin.Forms.ResourceDictionary")
{
var adderTuple = elementType.GetMethods(md => md.Name == "Add" && md.Parameters.Count == 1, Module).First();
var adderRef = Module.Import(adderTuple.Item1);
adderRef = Module.Import(adderRef.ResolveGenericParameters(adderTuple.Item2, Module));
Context.IL.Emit(OpCodes.Ldloc, parentVar);
Context.IL.Emit(OpCodes.Ldloc, vardef);
Context.IL.Emit(OpCodes.Callvirt, adderRef);
if (adderRef.ReturnType.FullName != "System.Void")
{
Context.IL.Emit(OpCodes.Pop);
}
}
}
else if ((contentProperty = GetContentProperty(parentVar.VariableType)) != null)
{
var name = new XmlName(node.NamespaceURI, contentProperty);
if (skips.Contains(name))
{
return;
}
Context.IL.Append(SetPropertyValue(Context.Variables[(IElementNode)parentNode], name, node, Context, node));
}
}
else if (IsCollectionItem(node, parentNode) && parentNode is ListNode)
{
// IL_000d: ldloc.2
// IL_000e: callvirt instance class [mscorlib]System.Collections.Generic.IList`1<!0> class [Xamarin.Forms.Core]Xamarin.Forms.Layout`1<class [Xamarin.Forms.Core]Xamarin.Forms.View>::get_Children()
// IL_0013: ldloc.0
// IL_0014: callvirt instance void class [mscorlib]System.Collections.Generic.ICollection`1<class [Xamarin.Forms.Core]Xamarin.Forms.View>::Add(!0)
var parentList = (ListNode)parentNode;
var parent = Context.Variables[((IElementNode)parentNode.Parent)];
if (skips.Contains(parentList.XmlName))
{
return;
}
var elementType = parent.VariableType;
var localname = parentList.XmlName.LocalName;
GetNameAndTypeRef(ref elementType, parentList.XmlName.NamespaceURI, ref localname, Context, node);
TypeReference propertyDeclaringType;
var property = elementType.GetProperty(pd => pd.Name == localname, out propertyDeclaringType);
MethodDefinition propertyGetter;
if (property != null && (propertyGetter = property.GetMethod) != null && propertyGetter.IsPublic)
{
var propertyGetterRef = Module.Import(propertyGetter);
propertyGetterRef = Module.Import(propertyGetterRef.ResolveGenericParameters(propertyDeclaringType, Module));
var propertyType = propertyGetterRef.ReturnType.ResolveGenericParameters(propertyDeclaringType);
var adderTuple = propertyType.GetMethods(md => md.Name == "Add" && md.Parameters.Count == 1, Module).First();
var adderRef = Module.Import(adderTuple.Item1);
adderRef = Module.Import(adderRef.ResolveGenericParameters(adderTuple.Item2, Module));
Context.IL.Emit(OpCodes.Ldloc, parent);
Context.IL.Emit(OpCodes.Callvirt, propertyGetterRef);
Context.IL.Emit(OpCodes.Ldloc, vardef);
Context.IL.Emit(OpCodes.Callvirt, adderRef);
if (adderRef.ReturnType.FullName != "System.Void")
{
Context.IL.Emit(OpCodes.Pop);
}
}
else
{
throw new XamlParseException(string.Format("Property {0} not found", localname), node);
}
}
}
public void Visit(ElementNode node, INode parentNode)
{
var typeref = Module.Import(node.XmlType.GetTypeReference(Module, node));
TypeDefinition typedef = typeref.Resolve();
if (IsXaml2009LanguagePrimitive(node))
{
var vardef = new VariableDefinition(typeref);
Context.Variables [node] = vardef;
Context.Body.Variables.Add(vardef);
Context.IL.Append(PushValueFromLanguagePrimitive(typedef, node));
Context.IL.Emit(OpCodes.Stloc, vardef);
return;
}
if (typeref.FullName == "Xamarin.Forms.Xaml.StaticExtension")
{
var markupProvider = new StaticExtension();
var il = markupProvider.ProvideValue(node, Module, Context, out typeref);
typeref = Module.Import(typeref);
var vardef = new VariableDefinition(typeref);
Context.Variables [node] = vardef;
Context.Body.Variables.Add(vardef);
Context.IL.Append(il);
Context.IL.Emit(OpCodes.Stloc, vardef);
//clean the node as it has been fully exhausted
node.Properties.Clear();
node.CollectionItems.Clear();
return;
}
MethodDefinition factoryCtorInfo = null;
MethodDefinition factoryMethodInfo = null;
MethodDefinition parameterizedCtorInfo = null;
MethodDefinition ctorInfo = null;
if (node.Properties.ContainsKey(XmlName.xArguments) && !node.Properties.ContainsKey(XmlName.xFactoryMethod))
{
factoryCtorInfo = typedef.AllMethods().FirstOrDefault(md => md.IsConstructor &&
!md.IsStatic &&
md.HasParameters &&
md.MatchXArguments(node, Module, Context));
if (factoryCtorInfo == null)
{
throw new XamlParseException(
string.Format("No constructors found for {0} with matching x:Arguments", typedef.FullName), node);
}
ctorInfo = factoryCtorInfo;
if (!typedef.IsValueType) //for ctor'ing typedefs, we first have to ldloca before the params
{
Context.IL.Append(PushCtorXArguments(factoryCtorInfo, node));
}
}
else if (node.Properties.ContainsKey(XmlName.xFactoryMethod))
{
var factoryMethod = (string)(node.Properties [XmlName.xFactoryMethod] as ValueNode).Value;
factoryMethodInfo = typedef.AllMethods().FirstOrDefault(md => !md.IsConstructor &&
md.Name == factoryMethod &&
md.IsStatic &&
md.MatchXArguments(node, Module, Context));
if (factoryMethodInfo == null)
{
throw new XamlParseException(
String.Format("No static method found for {0}::{1} ({2})", typedef.FullName, factoryMethod, null), node);
}
Context.IL.Append(PushCtorXArguments(factoryMethodInfo, node));
}
if (ctorInfo == null && factoryMethodInfo == null)
{
parameterizedCtorInfo = typedef.Methods.FirstOrDefault(md => md.IsConstructor &&
!md.IsStatic &&
md.HasParameters &&
md.Parameters.All(
pd =>
pd.CustomAttributes.Any(
ca =>
ca.AttributeType.FullName ==
"Xamarin.Forms.ParameterAttribute")));
}
if (parameterizedCtorInfo != null && ValidateCtorArguments(parameterizedCtorInfo, node))
{
ctorInfo = parameterizedCtorInfo;
// IL_0000: ldstr "foo"
Context.IL.Append(PushCtorArguments(parameterizedCtorInfo, node));
}
ctorInfo = ctorInfo ?? typedef.Methods.FirstOrDefault(md => md.IsConstructor && !md.HasParameters && !md.IsStatic);
var ctorinforef = ctorInfo?.ResolveGenericParameters(typeref, Module);
var factorymethodinforef = factoryMethodInfo?.ResolveGenericParameters(typeref, Module);
var implicitOperatorref = typedef.Methods.FirstOrDefault(md =>
md.IsPublic &&
md.IsStatic &&
md.IsSpecialName &&
md.Name == "op_Implicit" && md.Parameters [0].ParameterType.FullName == "System.String");
if (ctorinforef != null || factorymethodinforef != null || typedef.IsValueType)
{
VariableDefinition vardef = new VariableDefinition(typeref);
Context.Variables [node] = vardef;
Context.Body.Variables.Add(vardef);
ValueNode vnode = null;
if (node.CollectionItems.Count == 1 && (vnode = node.CollectionItems.First() as ValueNode) != null &&
vardef.VariableType.IsValueType)
{
//<Color>Purple</Color>
Context.IL.Append(vnode.PushConvertedValue(Context, typeref, new ICustomAttributeProvider [] { typedef },
node.PushServiceProvider(Context), false, true));
Context.IL.Emit(OpCodes.Stloc, vardef);
}
else if (node.CollectionItems.Count == 1 && (vnode = node.CollectionItems.First() as ValueNode) != null &&
implicitOperatorref != null)
{
//<FileImageSource>path.png</FileImageSource>
var implicitOperator = Module.Import(implicitOperatorref);
Context.IL.Emit(OpCodes.Ldstr, ((ValueNode)(node.CollectionItems.First())).Value as string);
Context.IL.Emit(OpCodes.Call, implicitOperator);
Context.IL.Emit(OpCodes.Stloc, vardef);
}
else if (factorymethodinforef != null)
{
Context.IL.Emit(OpCodes.Call, Module.Import(factorymethodinforef));
Context.IL.Emit(OpCodes.Stloc, vardef);
}
else if (!typedef.IsValueType)
{
var ctor = Module.Import(ctorinforef);
// IL_0001: newobj instance void class [Xamarin.Forms.Core]Xamarin.Forms.Button::'.ctor'()
// IL_0006: stloc.0
Context.IL.Emit(OpCodes.Newobj, ctor);
Context.IL.Emit(OpCodes.Stloc, vardef);
}
else if (ctorInfo != null && node.Properties.ContainsKey(XmlName.xArguments) &&
!node.Properties.ContainsKey(XmlName.xFactoryMethod) && ctorInfo.MatchXArguments(node, Module, Context))
{
// IL_0008: ldloca.s 1
// IL_000a: ldc.i4.1
// IL_000b: call instance void valuetype Test/Foo::'.ctor'(bool)
var ctor = Module.Import(ctorinforef);
Context.IL.Emit(OpCodes.Ldloca, vardef);
Context.IL.Append(PushCtorXArguments(factoryCtorInfo, node));
Context.IL.Emit(OpCodes.Call, ctor);
}
else
{
// IL_0000: ldloca.s 0
// IL_0002: initobj Test/Foo
Context.IL.Emit(OpCodes.Ldloca, vardef);
Context.IL.Emit(OpCodes.Initobj, Module.Import(typedef));
}
if (typeref.FullName == "Xamarin.Forms.Xaml.TypeExtension")
{
var visitor = new SetPropertiesVisitor(Context);
foreach (var cnode in node.Properties.Values.ToList())
{
cnode.Accept(visitor, node);
}
foreach (var cnode in node.CollectionItems)
{
cnode.Accept(visitor, node);
}
//As we're stripping the TypeExtension bare, keep the type if we need it later (hint: we do need it)
INode ntype;
if (!node.Properties.TryGetValue(new XmlName("", "TypeName"), out ntype))
{
ntype = node.CollectionItems [0];
}
var type = ((ValueNode)ntype).Value as string;
var prefix = "";
if (type.Contains(":"))
{
prefix = type.Split(':') [0].Trim();
type = type.Split(':') [1].Trim();
}
var namespaceuri = node.NamespaceResolver.LookupNamespace(prefix);
Context.TypeExtensions [node] = new XmlType(namespaceuri, type, null).GetTypeReference(Module, node);
if (!node.SkipProperties.Contains(new XmlName("", "TypeName")))
{
node.SkipProperties.Add(new XmlName("", "TypeName"));
}
var vardefref = new VariableDefinitionReference(vardef);
Context.IL.Append(SetPropertiesVisitor.ProvideValue(vardefref, Context, Module, node));
if (vardef != vardefref.VariableDefinition)
{
Context.Variables [node] = vardefref.VariableDefinition;
Context.Body.Variables.Add(vardefref.VariableDefinition);
}
}
if (typeref.FullName == "Xamarin.Forms.Xaml.ArrayExtension")
{
var visitor = new SetPropertiesVisitor(Context);
foreach (var cnode in node.Properties.Values.ToList())
{
cnode.Accept(visitor, node);
}
foreach (var cnode in node.CollectionItems)
{
cnode.Accept(visitor, node);
}
var markupProvider = new ArrayExtension();
var il = markupProvider.ProvideValue(node, Module, Context, out typeref);
vardef = new VariableDefinition(typeref);
Context.Variables[node] = vardef;
Context.Body.Variables.Add(vardef);
Context.IL.Append(il);
Context.IL.Emit(OpCodes.Stloc, vardef);
//clean the node as it has been fully exhausted
node.Properties.Remove(new XmlName("", "Type"));
node.CollectionItems.Clear();
}
}
}
public static IEnumerable <Instruction> ProvideValue(VariableDefinitionReference vardefref, ILContext context,
ModuleDefinition module, ElementNode node)
{
GenericInstanceType markupExtension;
IList <TypeReference> genericArguments;
if (vardefref.VariableDefinition.VariableType.FullName == "Xamarin.Forms.Xaml.ArrayExtension" &&
vardefref.VariableDefinition.VariableType.ImplementsGenericInterface("Xamarin.Forms.Xaml.IMarkupExtension`1",
out markupExtension, out genericArguments))
{
var markExt = markupExtension.Resolve();
var provideValueInfo = markExt.Methods.First(md => md.Name == "ProvideValue");
var provideValue = module.Import(provideValueInfo);
provideValue =
module.Import(provideValue.ResolveGenericParameters(markupExtension, module));
var typeNode = node.Properties[new XmlName("", "Type")];
TypeReference arrayTypeRef;
if (context.TypeExtensions.TryGetValue(typeNode, out arrayTypeRef))
{
vardefref.VariableDefinition = new VariableDefinition(module.Import(arrayTypeRef.MakeArrayType()));
}
else
{
vardefref.VariableDefinition = new VariableDefinition(module.Import(genericArguments.First()));
}
yield return(Instruction.Create(OpCodes.Ldloc, context.Variables[node]));
foreach (var instruction in node.PushServiceProvider(context))
{
yield return(instruction);
}
yield return(Instruction.Create(OpCodes.Callvirt, provideValue));
if (arrayTypeRef != null)
{
yield return(Instruction.Create(OpCodes.Castclass, module.Import(arrayTypeRef.MakeArrayType())));
}
yield return(Instruction.Create(OpCodes.Stloc, vardefref.VariableDefinition));
}
else if (vardefref.VariableDefinition.VariableType.ImplementsGenericInterface("Xamarin.Forms.Xaml.IMarkupExtension`1",
out markupExtension, out genericArguments))
{
var markExt = markupExtension.Resolve();
var provideValueInfo = markExt.Methods.First(md => md.Name == "ProvideValue");
var provideValue = module.Import(provideValueInfo);
provideValue =
module.Import(provideValue.ResolveGenericParameters(markupExtension, module));
vardefref.VariableDefinition = new VariableDefinition(module.Import(genericArguments.First()));
yield return(Instruction.Create(OpCodes.Ldloc, context.Variables[node]));
foreach (var instruction in node.PushServiceProvider(context))
{
yield return(instruction);
}
yield return(Instruction.Create(OpCodes.Callvirt, provideValue));
yield return(Instruction.Create(OpCodes.Stloc, vardefref.VariableDefinition));
}
else if (context.Variables[node].VariableType.ImplementsInterface(module.Import(typeof(IMarkupExtension))))
{
var markExt = module.Import(typeof(IMarkupExtension)).Resolve();
var provideValueInfo = markExt.Methods.First(md => md.Name == "ProvideValue");
var provideValue = module.Import(provideValueInfo);
vardefref.VariableDefinition = new VariableDefinition(module.TypeSystem.Object);
yield return(Instruction.Create(OpCodes.Ldloc, context.Variables[node]));
foreach (var instruction in node.PushServiceProvider(context))
{
yield return(instruction);
}
yield return(Instruction.Create(OpCodes.Callvirt, provideValue));
yield return(Instruction.Create(OpCodes.Stloc, vardefref.VariableDefinition));
}
else if (context.Variables[node].VariableType.ImplementsInterface(module.Import(typeof(IValueProvider))))
{
var markExt = module.Import(typeof(IValueProvider)).Resolve();
var provideValueInfo = markExt.Methods.First(md => md.Name == "ProvideValue");
var provideValue = module.Import(provideValueInfo);
vardefref.VariableDefinition = new VariableDefinition(module.TypeSystem.Object);
yield return(Instruction.Create(OpCodes.Ldloc, context.Variables[node]));
foreach (var instruction in node.PushServiceProvider(context))
{
yield return(instruction);
}
yield return(Instruction.Create(OpCodes.Callvirt, provideValue));
yield return(Instruction.Create(OpCodes.Stloc, vardefref.VariableDefinition));
}
}
public void Visit(ElementNode node, INode parentNode)
{
//Set Resources in ResourcesDictionaries
if (IsCollectionItem(node, parentNode) && parentNode is IElementNode)
{
// Collection element, implicit content, or implicit collection element.
CustomAttribute cpAttr;
var parentVar = Context.Variables[(IElementNode)parentNode];
if (parentVar.VariableType.ImplementsInterface(Module.Import(typeof(IEnumerable))))
{
if ((parentVar.VariableType.FullName == "Xamarin.Forms.ResourceDictionary" ||
parentVar.VariableType.Resolve().BaseType.FullName == "Xamarin.Forms.ResourceDictionary") &&
!node.Properties.ContainsKey(XmlName.xKey))
{
node.Accept(new SetPropertiesVisitor(Context), parentNode);
if (node.XmlType.Name != "Style")
{
throw new XamlParseException("resources in ResourceDictionary require a x:Key attribute", node);
}
//if this node is an IMarkupExtension, invoke ProvideValue() and replace the variable
var vardef = Context.Variables[node];
var vardefref = new VariableDefinitionReference(vardef);
Context.IL.Append(SetPropertiesVisitor.ProvideValue(vardefref, Context, Module, node));
if (vardef != vardefref.VariableDefinition)
{
vardef = vardefref.VariableDefinition;
Context.Body.Variables.Add(vardef);
Context.Variables[node] = vardef;
}
Context.IL.Emit(OpCodes.Ldloc, parentVar);
Context.IL.Emit(OpCodes.Ldloc, Context.Variables[node]);
Context.IL.Emit(OpCodes.Callvirt,
Module.Import(
Module.Import(typeof(ResourceDictionary))
.Resolve()
.Methods.Single(md => md.Name == "Add" && md.Parameters.Count == 1)));
}
else if ((parentVar.VariableType.FullName == "Xamarin.Forms.ResourceDictionary" ||
parentVar.VariableType.Resolve().BaseType.FullName == "Xamarin.Forms.ResourceDictionary") &&
node.Properties.ContainsKey(XmlName.xKey))
{
node.Accept(new SetPropertiesVisitor(Context), parentNode);
//if this node is an IMarkupExtension, invoke ProvideValue() and replace the variable
var vardef = Context.Variables[node];
var vardefref = new VariableDefinitionReference(vardef);
Context.IL.Append(SetPropertiesVisitor.ProvideValue(vardefref, Context, Module, node));
if (vardef != vardefref.VariableDefinition)
{
vardef = vardefref.VariableDefinition;
Context.Body.Variables.Add(vardef);
Context.Variables[node] = vardef;
}
// IL_0013: ldloc.0
// IL_0014: ldstr "key"
// IL_0019: ldstr "foo"
// IL_001e: callvirt instance void class [Xamarin.Forms.Core]Xamarin.Forms.ResourceDictionary::Add(string, object)
Context.IL.Emit(OpCodes.Ldloc, parentVar);
Context.IL.Emit(OpCodes.Ldstr, (node.Properties[XmlName.xKey] as ValueNode).Value as string);
var varDef = Context.Variables[node];
Context.IL.Emit(OpCodes.Ldloc, varDef);
if (varDef.VariableType.IsValueType)
{
Context.IL.Emit(OpCodes.Box, Module.Import(varDef.VariableType));
}
Context.IL.Emit(OpCodes.Callvirt,
Module.Import(
Module.Import(typeof(ResourceDictionary))
.Resolve()
.Methods.Single(md => md.Name == "Add" && md.Parameters.Count == 2)));
}
}
}
//Set ResourcesDictionaries to their parents
XmlName propertyName;
if (SetPropertiesVisitor.TryGetPropertyName(node, parentNode, out propertyName) &&
(propertyName.LocalName == "Resources" || propertyName.LocalName.EndsWith(".Resources", StringComparison.Ordinal)) &&
(Context.Variables[node].VariableType.FullName == "Xamarin.Forms.ResourceDictionary" ||
Context.Variables[node].VariableType.Resolve().BaseType.FullName == "Xamarin.Forms.ResourceDictionary"))
{
SetPropertiesVisitor.SetPropertyValue(Context.Variables[(IElementNode)parentNode], propertyName, node, Context, node);
}
}
public void Visit(ElementNode node, INode parentNode)
{
if (node.SkipPrefix((node.NamespaceResolver ?? parentNode.NamespaceResolver)?.LookupPrefix(node.NamespaceURI)))
return;
//if this node is an IMarkupExtension, invoke ProvideValue() and replace the variable
var vardef = Context.Variables[node];
var vardefref = new VariableDefinitionReference(vardef);
Context.IL.Append(ProvideValue(vardefref, Context, Module, node));
if (vardef != vardefref.VariableDefinition)
{
vardef = vardefref.VariableDefinition;
Context.Body.Variables.Add(vardef);
Context.Variables[node] = vardef;
}
XmlName propertyName;
if (TryGetPropertyName(node, parentNode, out propertyName))
{
if (skips.Contains(propertyName))
return;
if (propertyName == XmlName._CreateContent)
SetDataTemplate((IElementNode)parentNode, node, Context, node);
else
SetPropertyValue(Context.Variables[(IElementNode)parentNode], propertyName, node, Context, node);
}
else if (IsCollectionItem(node, parentNode) && parentNode is IElementNode)
{
// Collection element, implicit content, or implicit collection element.
string contentProperty;
var parentVar = Context.Variables[(IElementNode)parentNode];
if (parentVar.VariableType.ImplementsInterface(Module.Import(typeof (IEnumerable))))
{
var elementType = parentVar.VariableType;
if (elementType.FullName != "Xamarin.Forms.ResourceDictionary" && elementType.Resolve().BaseType.FullName != "Xamarin.Forms.ResourceDictionary")
{
var adderTuple = elementType.GetMethods(md => md.Name == "Add" && md.Parameters.Count == 1, Module).First();
var adderRef = Module.Import(adderTuple.Item1);
adderRef = Module.Import(adderRef.ResolveGenericParameters(adderTuple.Item2, Module));
Context.IL.Emit(OpCodes.Ldloc, parentVar);
Context.IL.Emit(OpCodes.Ldloc, vardef);
Context.IL.Emit(OpCodes.Callvirt, adderRef);
if (adderRef.ReturnType.FullName != "System.Void")
Context.IL.Emit(OpCodes.Pop);
}
}
else if ((contentProperty = GetContentProperty(parentVar.VariableType)) != null)
{
var name = new XmlName(node.NamespaceURI, contentProperty);
if (skips.Contains(name))
return;
SetPropertyValue(Context.Variables[(IElementNode)parentNode], name, node, Context, node);
}
}
else if (IsCollectionItem(node, parentNode) && parentNode is ListNode)
{
// IL_000d: ldloc.2
// IL_000e: callvirt instance class [mscorlib]System.Collections.Generic.IList`1<!0> class [Xamarin.Forms.Core]Xamarin.Forms.Layout`1<class [Xamarin.Forms.Core]Xamarin.Forms.View>::get_Children()
// IL_0013: ldloc.0
// IL_0014: callvirt instance void class [mscorlib]System.Collections.Generic.ICollection`1<class [Xamarin.Forms.Core]Xamarin.Forms.View>::Add(!0)
var parentList = (ListNode)parentNode;
var parent = Context.Variables[((IElementNode)parentNode.Parent)];
if (skips.Contains(parentList.XmlName))
return;
var elementType = parent.VariableType;
var localname = parentList.XmlName.LocalName;
GetNameAndTypeRef(ref elementType, parentList.XmlName.NamespaceURI, ref localname, Context, node);
TypeReference propertyDeclaringType;
var property = elementType.GetProperty(pd => pd.Name == localname, out propertyDeclaringType);
MethodDefinition propertyGetter;
if (property != null && (propertyGetter = property.GetMethod) != null && propertyGetter.IsPublic)
{
var propertyGetterRef = Module.Import(propertyGetter);
propertyGetterRef = Module.Import(propertyGetterRef.ResolveGenericParameters(propertyDeclaringType, Module));
var propertyType = propertyGetterRef.ReturnType.ResolveGenericParameters(propertyDeclaringType);
var adderTuple = propertyType.GetMethods(md => md.Name == "Add" && md.Parameters.Count == 1, Module).First();
var adderRef = Module.Import(adderTuple.Item1);
adderRef = Module.Import(adderRef.ResolveGenericParameters(adderTuple.Item2, Module));
Context.IL.Emit(OpCodes.Ldloc, parent);
Context.IL.Emit(OpCodes.Callvirt, propertyGetterRef);
Context.IL.Emit(OpCodes.Ldloc, vardef);
Context.IL.Emit(OpCodes.Callvirt, adderRef);
if (adderRef.ReturnType.FullName != "System.Void")
Context.IL.Emit(OpCodes.Pop);
}
}
}
public static IEnumerable<Instruction> ProvideValue(VariableDefinitionReference vardefref, ILContext context,
ModuleDefinition module, ElementNode node)
{
GenericInstanceType markupExtension;
IList<TypeReference> genericArguments;
if (vardefref.VariableDefinition.VariableType.FullName == "Xamarin.Forms.Xaml.ArrayExtension" &&
vardefref.VariableDefinition.VariableType.ImplementsGenericInterface("Xamarin.Forms.Xaml.IMarkupExtension`1",
out markupExtension, out genericArguments))
{
var markExt = markupExtension.Resolve();
var provideValueInfo = markExt.Methods.First(md => md.Name == "ProvideValue");
var provideValue = module.Import(provideValueInfo);
provideValue =
module.Import(provideValue.MakeGeneric(markupExtension.GenericArguments.Select(tr => module.Import(tr)).ToArray()));
var typeNode = node.Properties[new XmlName("", "Type")];
TypeReference arrayTypeRef;
if (context.TypeExtensions.TryGetValue(typeNode, out arrayTypeRef))
vardefref.VariableDefinition = new VariableDefinition(module.Import(arrayTypeRef.MakeArrayType()));
else
vardefref.VariableDefinition = new VariableDefinition(module.Import(genericArguments.First()));
yield return Instruction.Create(OpCodes.Ldloc, context.Variables[node]);
foreach (var instruction in node.PushServiceProvider(context))
yield return instruction;
yield return Instruction.Create(OpCodes.Callvirt, provideValue);
if (arrayTypeRef != null)
yield return Instruction.Create(OpCodes.Castclass, module.Import(arrayTypeRef.MakeArrayType()));
yield return Instruction.Create(OpCodes.Stloc, vardefref.VariableDefinition);
}
else if (vardefref.VariableDefinition.VariableType.ImplementsGenericInterface("Xamarin.Forms.Xaml.IMarkupExtension`1",
out markupExtension, out genericArguments))
{
var markExt = markupExtension.Resolve();
var provideValueInfo = markExt.Methods.First(md => md.Name == "ProvideValue");
var provideValue = module.Import(provideValueInfo);
provideValue =
module.Import(provideValue.MakeGeneric(markupExtension.GenericArguments.Select(tr => module.Import(tr)).ToArray()));
vardefref.VariableDefinition = new VariableDefinition(module.Import(genericArguments.First()));
yield return Instruction.Create(OpCodes.Ldloc, context.Variables[node]);
foreach (var instruction in node.PushServiceProvider(context))
yield return instruction;
yield return Instruction.Create(OpCodes.Callvirt, provideValue);
yield return Instruction.Create(OpCodes.Stloc, vardefref.VariableDefinition);
}
else if (context.Variables[node].VariableType.ImplementsInterface(module.Import(typeof (IMarkupExtension))))
{
var markExt = module.Import(typeof (IMarkupExtension)).Resolve();
var provideValueInfo = markExt.Methods.First(md => md.Name == "ProvideValue");
var provideValue = module.Import(provideValueInfo);
vardefref.VariableDefinition = new VariableDefinition(module.TypeSystem.Object);
yield return Instruction.Create(OpCodes.Ldloc, context.Variables[node]);
foreach (var instruction in node.PushServiceProvider(context))
yield return instruction;
yield return Instruction.Create(OpCodes.Callvirt, provideValue);
yield return Instruction.Create(OpCodes.Stloc, vardefref.VariableDefinition);
}
else if (context.Variables[node].VariableType.ImplementsInterface(module.Import(typeof (IValueProvider))))
{
var markExt = module.Import(typeof (IValueProvider)).Resolve();
var provideValueInfo = markExt.Methods.First(md => md.Name == "ProvideValue");
var provideValue = module.Import(provideValueInfo);
vardefref.VariableDefinition = new VariableDefinition(module.TypeSystem.Object);
yield return Instruction.Create(OpCodes.Ldloc, context.Variables[node]);
foreach (var instruction in node.PushServiceProvider(context))
yield return instruction;
yield return Instruction.Create(OpCodes.Callvirt, provideValue);
yield return Instruction.Create(OpCodes.Stloc, vardefref.VariableDefinition);
}
}
public void Visit(ElementNode node, INode parentNode)
{
//Set Resources in ResourcesDictionaries
if (IsCollectionItem(node, parentNode) && parentNode is IElementNode)
{
// Collection element, implicit content, or implicit collection element.
CustomAttribute cpAttr;
var parentVar = Context.Variables[(IElementNode)parentNode];
if (parentVar.VariableType.ImplementsInterface(Module.Import(typeof (IEnumerable))))
{
if ((parentVar.VariableType.FullName == "Xamarin.Forms.ResourceDictionary" ||
parentVar.VariableType.Resolve().BaseType.FullName == "Xamarin.Forms.ResourceDictionary") &&
!node.Properties.ContainsKey(XmlName.xKey))
{
node.Accept(new SetPropertiesVisitor(Context), parentNode);
if (node.XmlType.Name != "Style")
throw new XamlParseException("resources in ResourceDictionary require a x:Key attribute", node);
//if this node is an IMarkupExtension, invoke ProvideValue() and replace the variable
var vardef = Context.Variables[node];
var vardefref = new VariableDefinitionReference(vardef);
Context.IL.Append(SetPropertiesVisitor.ProvideValue(vardefref, Context, Module, node));
if (vardef != vardefref.VariableDefinition)
{
vardef = vardefref.VariableDefinition;
Context.Body.Variables.Add(vardef);
Context.Variables[node] = vardef;
}
Context.IL.Emit(OpCodes.Ldloc, parentVar);
Context.IL.Emit(OpCodes.Ldloc, Context.Variables[node]);
Context.IL.Emit(OpCodes.Callvirt,
Module.Import(
Module.Import(typeof (ResourceDictionary))
.Resolve()
.Methods.Single(md => md.Name == "Add" && md.Parameters.Count == 1)));
}
else if ((parentVar.VariableType.FullName == "Xamarin.Forms.ResourceDictionary" ||
parentVar.VariableType.Resolve().BaseType.FullName == "Xamarin.Forms.ResourceDictionary") &&
node.Properties.ContainsKey(XmlName.xKey))
{
node.Accept(new SetPropertiesVisitor(Context), parentNode);
//if this node is an IMarkupExtension, invoke ProvideValue() and replace the variable
var vardef = Context.Variables[node];
var vardefref = new VariableDefinitionReference(vardef);
Context.IL.Append(SetPropertiesVisitor.ProvideValue(vardefref, Context, Module, node));
if (vardef != vardefref.VariableDefinition)
{
vardef = vardefref.VariableDefinition;
Context.Body.Variables.Add(vardef);
Context.Variables[node] = vardef;
}
// IL_0013: ldloc.0
// IL_0014: ldstr "key"
// IL_0019: ldstr "foo"
// IL_001e: callvirt instance void class [Xamarin.Forms.Core]Xamarin.Forms.ResourceDictionary::Add(string, object)
Context.IL.Emit(OpCodes.Ldloc, parentVar);
Context.IL.Emit(OpCodes.Ldstr, (node.Properties[XmlName.xKey] as ValueNode).Value as string);
var varDef = Context.Variables[node];
Context.IL.Emit(OpCodes.Ldloc, varDef);
if (varDef.VariableType.IsValueType)
Context.IL.Emit(OpCodes.Box, Module.Import(varDef.VariableType));
Context.IL.Emit(OpCodes.Callvirt,
Module.Import(
Module.Import(typeof (ResourceDictionary))
.Resolve()
.Methods.Single(md => md.Name == "Add" && md.Parameters.Count == 2)));
}
}
}
//Set ResourcesDictionaries to their parents
XmlName propertyName;
if (SetPropertiesVisitor.TryGetPropertyName(node, parentNode, out propertyName) &&
(propertyName.LocalName == "Resources" || propertyName.LocalName.EndsWith(".Resources", StringComparison.Ordinal)) &&
(Context.Variables[node].VariableType.FullName == "Xamarin.Forms.ResourceDictionary" ||
Context.Variables[node].VariableType.Resolve().BaseType.FullName == "Xamarin.Forms.ResourceDictionary"))
SetPropertiesVisitor.SetPropertyValue(Context.Variables[(IElementNode)parentNode], propertyName, node, Context, node);
}
