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);
}
}
