public XamlIlNodeEmitResult Emit(XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
// Discard the stack value we are "supposed" to manipulate
codeGen.Pop();
context.Emit(Imperative, codeGen, null);
return(XamlIlNodeEmitResult.Void(1));
}
public XamlIlNodeEmitResult Emit(XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
var next = codeGen.DefineLabel();
var scopeField = context.RuntimeContext.ContextType.Fields.First(f =>
f.Name == AvaloniaXamlIlLanguage.ContextNameScopeFieldName);
using (var local = codeGen.LocalsPool.GetLocal(_types.StyledElement))
{
codeGen
.Isinst(_types.StyledElement)
.Dup()
.Stloc(local.Local)
.Brfalse(next)
.Ldloc(local.Local)
.Ldloc(context.ContextLocal)
.Ldfld(scopeField)
.EmitCall(_types.NameScopeSetNameScope, true)
.MarkLabel(next)
.Ldloc(context.ContextLocal)
.Ldfld(scopeField)
.EmitCall(_types.INameScopeComplete, true);
}
return(XamlIlNodeEmitResult.Void(1));
}
public XamlIlNodeEmitResult Emit(XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
var exts = context.Configuration.TypeSystem.GetType("Avalonia.Controls.NameScopeExtensions");
var findNameScope = exts.FindMethod(m => m.Name == "FindNameScope");
var registerMethod = findNameScope.ReturnType.FindMethod(m => m.Name == "Register");
using (var targetLoc = context.GetLocal(context.Configuration.WellKnownTypes.Object))
using (var nameScopeLoc = context.GetLocal(findNameScope.ReturnType))
{
var exit = codeGen.DefineLabel();
codeGen
// var target = {pop}
.Stloc(targetLoc.Local)
// var scope = target.FindNameScope()
.Ldloc(targetLoc.Local)
.Castclass(findNameScope.Parameters[0])
.EmitCall(findNameScope)
.Stloc(nameScopeLoc.Local)
// if({scope} != null) goto call;
.Ldloc(nameScopeLoc.Local)
.Brfalse(exit)
.Ldloc(nameScopeLoc.Local);
context.Emit(Value, codeGen, Value.Type.GetClrType());
codeGen
.Ldloc(targetLoc.Local)
.EmitCall(registerMethod)
.MarkLabel(exit);
}
return(XamlIlNodeEmitResult.Void(1));
}
public XamlIlNodeEmitResult Emit(IXamlIlAstNode node, XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
if (!(node is XamlIlObjectInitializationNode init))
{
return(null);
}
var supportInitType = context.Configuration.TypeMappings.SupportInitialize;
var supportsInitialize = supportInitType != null &&
context.Configuration.TypeMappings.SupportInitialize
.IsAssignableFrom(init.Type);
if (supportsInitialize)
{
codeGen
// We need a copy for/EndInit
.Emit(OpCodes.Dup);
if (!init.SkipBeginInit)
{
codeGen
.Emit(OpCodes.Dup)
.EmitCall(supportInitType.FindMethod(m => m.Name == "BeginInit"));
}
}
var addToParentStack = context.RuntimeContext.ParentListField != null &&
!init.Type.IsValueType &&
context.GetOrCreateItem <XamlIlNeedsParentStackCache>().NeedsParentStack(node);
if (addToParentStack)
{
using (var local = context.GetLocal(init.Type))
codeGen
.Stloc(local.Local)
.Ldloc(context.ContextLocal)
.Ldloc(local.Local)
.EmitCall(context.RuntimeContext.PushParentMethod)
.Ldloc(local.Local);
}
context.Emit(init.Manipulation, codeGen, null);
if (addToParentStack)
{
codeGen
.Ldloc(context.ContextLocal)
.EmitCall(context.RuntimeContext.PopParentMethod, true);
}
if (supportsInitialize)
{
codeGen
.EmitCall(supportInitType.FindMethod(m => m.Name == "EndInit"));
}
return(XamlIlNodeEmitResult.Void(1));
}
public XamlIlNodeEmitResult Emit(IXamlIlAstNode node, XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
if (!(node is XamlIlPropertyAssignmentNode an))
return null;
var callOp = an.Property.Setter.IsStatic ? OpCodes.Call : OpCodes.Callvirt;
context.Emit(an.Value, codeGen, an.Property.Setter.Parameters.Last());
codeGen.Emit(callOp, an.Property.Setter);
return XamlIlNodeEmitResult.Void(1);
}
public XamlIlNodeEmitResult Emit(IXamlIlAstNode node, XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
if (!(node is XamlIlPropertyValueManipulationNode pvm))
{
return(null);
}
codeGen.EmitCall(pvm.Property.Getter);
context.Emit(pvm.Manipulation, codeGen, null);
return(XamlIlNodeEmitResult.Void(1));
}
public XamlIlNodeEmitResult Emit(XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
var scopeField = context.RuntimeContext.ContextType.Fields.First(f =>
f.Name == AvaloniaXamlIlLanguage.ContextNameScopeFieldName);
using (var targetLoc = context.GetLocal(context.Configuration.WellKnownTypes.Object))
{
codeGen
// var target = {pop}
.Stloc(targetLoc.Local)
// _context.NameScope.Register(Name, target)
.Ldloc(context.ContextLocal)
.Ldfld(scopeField);
context.Emit(Name, codeGen, Name.Type.GetClrType());
codeGen
.Ldloc(targetLoc.Local)
.EmitCall(_types.INameScopeRegister, true);
}
return(XamlIlNodeEmitResult.Void(1));
}
public XamlIlNodeEmitResult Emit(IXamlIlAstNode node, XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
if (!(node is XamlIlMethodCallBaseNode mc))
{
return(null);
}
bool thisArgFromArgs = node is XamlIlStaticOrTargetedReturnMethodCallNode;
bool expectsVoid = node is XamlIlNoReturnMethodCallNode;
for (var c = 0; c < mc.Arguments.Count; c++)
{
var off = thisArgFromArgs ? 0 : 1;
var expectedType = mc.Method.ParametersWithThis[c + off];
context.Emit(mc.Arguments[c], codeGen, expectedType);
}
mc.Method.Emit(context, codeGen, expectsVoid);
var isVoid = mc.Method.ReturnType.Equals(context.Configuration.WellKnownTypes.Void);
if (!expectsVoid && isVoid)
{
throw new XamlIlLoadException(
$"XamlIlStaticReturnMethodCallNode expects a value while {mc.Method.Name} returns void", node);
}
var consumed = thisArgFromArgs ? 0 : 1;
return(isVoid || expectsVoid
? XamlIlNodeEmitResult.Void(consumed)
: XamlIlNodeEmitResult.Type(consumed, mc.Method.ReturnType));
}
public XamlIlNodeEmitResult Emit(IXamlIlAstNode node, XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
if (!(node is XamlIlManipulationGroupNode group))
{
return(null);
}
if (group.Children.Count == 0)
{
codeGen.Emit(OpCodes.Pop);
}
else
{
for (var c = 0; c < group.Children.Count; c++)
{
if (c != group.Children.Count - 1)
{
codeGen.Emit(OpCodes.Dup);
}
context.Emit(group.Children[c], codeGen, null);
}
}
return(XamlIlNodeEmitResult.Void(1));
}
public XamlIlNodeEmitResult Emit(XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
context.Emit(Value, codeGen, Value.Type.GetClrType());
context.Emit(Manipulation, codeGen, null);
return(XamlIlNodeEmitResult.Void(0));
}
public XamlIlNodeEmitResult Emit(IXamlIlAstNode node, XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
if (!(node is XamlIlPropertyAssignmentNode an))
{
return(null);
}
var setters = ValidateAndGetSetters(an);
for (var c = 0; c < an.Values.Count - 1; c++)
{
context.Emit(an.Values[c], codeGen, an.Values[c].Type.GetClrType());
}
var value = an.Values.Last();
var isValueType = value.Type.GetClrType().IsValueType;
// If there is only one available setter or if value is a value type, always use the first one
if (setters.Count == 1 || isValueType)
{
var setter = an.PossibleSetters.First();
context.Emit(value, codeGen, setter.Parameters.Last());
setter.Emit(codeGen);
}
else
{
var checkedTypes = new List <IXamlIlType>();
IXamlIlLabel exit = codeGen.DefineLabel();
IXamlIlLabel next = null;
var hadJumps = false;
context.Emit(value, codeGen, value.Type.GetClrType());
foreach (var setter in setters)
{
var type = setter.Parameters.Last();
// We have already checked this type or its base type
if (checkedTypes.Any(ch => ch.IsAssignableFrom(type)))
{
continue;
}
if (next != null)
{
codeGen.MarkLabel(next);
next = null;
}
IXamlIlLabel Next() => next ?? (next = codeGen.DefineLabel());
var checkNext = false;
if (setter.BinderParameters.AllowRuntimeNull)
{
checkedTypes.Add(type);
}
else
{
// Check for null; Also don't add this type to the list of checked ones because of the null check
codeGen
.Dup()
.Brfalse(Next());
checkNext = true;
}
// Only do dynamic checks if we know that type is not assignable by downcast
if (!type.IsAssignableFrom(value.Type.GetClrType()))
{
codeGen
.Dup()
.Isinst(type)
.Brfalse(Next());
checkNext = true;
}
if (checkNext)
{
hadJumps = true;
}
TypeSystemHelpers.EmitConvert(context, codeGen, value, value.Type.GetClrType(), type);
setter.Emit(codeGen);
if (hadJumps)
{
codeGen.Br(exit);
}
if (!checkNext)
{
break;
}
}
if (next != null)
{
codeGen.MarkLabel(next);
if (setters.Any(x => !x.BinderParameters.AllowRuntimeNull))
{
next = codeGen.DefineLabel();
codeGen
.Dup()
.Brtrue(next)
.Newobj(context.Configuration.TypeSystem.GetType("System.NullReferenceException")
.FindConstructor())
.Throw();
codeGen.MarkLabel(next);
}
codeGen
.Newobj(context.Configuration.TypeSystem.GetType("System.InvalidCastException")
.FindConstructor())
.Throw();
}
codeGen.MarkLabel(exit);
}
return(XamlIlNodeEmitResult.Void(1));
}
public XamlIlNodeEmitResult Emit(IXamlIlAstNode node, XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
if (!(node is XamlIlObjectInitializationNode init))
{
return(null);
}
var supportInitType = context.Configuration.TypeMappings.SupportInitialize;
var supportsInitialize = supportInitType != null &&
context.Configuration.TypeMappings.SupportInitialize
.IsAssignableFrom(init.Type);
if (supportsInitialize)
{
codeGen
// We need a copy for/EndInit
.Emit(OpCodes.Dup);
if (!init.SkipBeginInit)
{
codeGen
.Emit(OpCodes.Dup)
.EmitCall(supportInitType.FindMethod(m => m.Name == "BeginInit"));
}
}
IXamlIlType objectListType = null;
var addToParentStack = context.RuntimeContext.ParentListField != null &&
!init.Type.IsValueType &&
context.GetOrCreateItem <XamlIlNeedsParentStackCache>().NeedsParentStack(node);
if (addToParentStack)
{
objectListType = context.Configuration.TypeSystem.GetType("System.Collections.Generic.List`1")
.MakeGenericType(new[] { context.Configuration.WellKnownTypes.Object });
using (var local = context.GetLocal(init.Type))
codeGen
.Stloc(local.Local)
.Ldloc(context.ContextLocal).Ldfld(context.RuntimeContext.ParentListField)
.Ldloc(local.Local)
.EmitCall(objectListType.FindMethod("Add", context.Configuration.WellKnownTypes.Void,
false, context.Configuration.WellKnownTypes.Object))
.Ldloc(local.Local);
}
context.Emit(init.Manipulation, codeGen, null);
if (addToParentStack)
{
codeGen
.Ldloc(context.ContextLocal).Ldfld(context.RuntimeContext.ParentListField)
.Ldloc(context.ContextLocal).Ldfld(context.RuntimeContext.ParentListField)
.EmitCall(objectListType.FindMethod(m => m.Name == "get_Count"))
.Ldc_I4(1).Emit(OpCodes.Sub)
.EmitCall(objectListType.FindMethod(m => m.Name == "RemoveAt"));
}
if (supportsInitialize)
{
codeGen
.EmitCall(supportInitType.FindMethod(m => m.Name == "EndInit"));
}
return(XamlIlNodeEmitResult.Void(1));
}
public XamlIlNodeEmitResult Emit(IXamlIlAstNode node, XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
if (!(node is XamlIlMarkupExtensionNode me))
{
return(null);
}
XamlIlNeedsParentStackCache.Verify(context, node);
var ilgen = codeGen;
var so = context.Configuration.WellKnownTypes.Object;
var ptype = me.Manipulation?.ParametersWithThis[1] ?? me.Property.PropertyType;
var rtype = me.ProvideValue?.ReturnType ?? me.Value.Type.GetClrType();
var needProvideValueTarget = me.ProvideValue != null &&
me.ProvideValue.Parameters.Count != 0 &&
context.RuntimeContext.PropertyTargetObject != null &&
me.Property != null;
void EmitPropertyDescriptor()
{
if (me.Property == null)
{
ilgen.Ldnull();
}
else if (context.Configuration.TypeMappings.ProvideValueTargetPropertyEmitter
?.Invoke(context, codeGen, me.Property) == true)
{
return;
}
else if (me.Property is XamlIlAstAttachedProperty)
{
ilgen.Ldtoken(me.Property.Getter ?? me.Property.Setter)
.Emit(OpCodes.Box, context.Configuration.TypeSystem.GetType("System.RuntimeMethodHandle"));
}
else
{
ilgen.Ldstr(me.Property?.Name);
}
}
using (var resultLocalContainer = context.GetLocal(rtype))
{
var resultLocal = resultLocalContainer.Local;
using (var targetObjectLocal = needProvideValueTarget ? context.GetLocal(so) : null)
{
if (needProvideValueTarget)
{
ilgen
.Dup().Stloc(targetObjectLocal.Local);
}
context.Emit(me.Value, codeGen, me.Value.Type.GetClrType());
if (me.ProvideValue?.Parameters.Count > 0)
{
ilgen
.Emit(OpCodes.Ldloc, context.ContextLocal);
}
if (needProvideValueTarget)
{
ilgen
.Ldloc(context.ContextLocal)
.Ldloc(targetObjectLocal.Local)
.Stfld(context.RuntimeContext.PropertyTargetObject)
.Ldloc(context.ContextLocal);
EmitPropertyDescriptor();
ilgen
.Stfld(context.RuntimeContext.PropertyTargetProperty);
}
if (me.ProvideValue != null)
{
ilgen
.Emit(OpCodes.Call, me.ProvideValue);
}
ilgen
.Emit(OpCodes.Stloc, resultLocal);
if (needProvideValueTarget)
{
ilgen
.Ldloc(context.ContextLocal)
.Ldnull()
.Stfld(context.RuntimeContext.PropertyTargetObject)
.Ldloc(context.ContextLocal)
.Ldnull()
.Stfld(context.RuntimeContext.PropertyTargetProperty);
}
}
// At this point we have the target object at the top of the stack and markup extension result in resultLocal
var exit = ilgen.DefineLabel();
// This is needed for custom conversions of Binding to object
var customTypes = context.Configuration.TypeMappings.MarkupExtensionCustomResultTypes;
// This is needed for properties that accept Binding
if (
me.Property != null &&
context.Configuration.TypeMappings.ShouldIgnoreMarkupExtensionCustomResultForProperty !=
null)
{
customTypes = customTypes.Where(ct =>
!context.Configuration.TypeMappings
.ShouldIgnoreMarkupExtensionCustomResultForProperty(me.Property, ct))
.ToList();
}
if (customTypes.Any() && !rtype.IsValueType)
{
void EmitCustomActionCall()
{
EmitPropertyDescriptor();
codeGen
.Emit(OpCodes.Ldloc, context.ContextLocal)
.Emit(OpCodes.Ldloc, resultLocal);
if (rtype.IsValueType)
{
codeGen.Emit(OpCodes.Box, rtype);
}
codeGen
.Emit(OpCodes.Call, context.Configuration.TypeMappings.MarkupExtensionCustomResultHandler)
.Emit(OpCodes.Br, exit);
}
// Skip conversion attempts and call custom conversion directly
if (customTypes.Any(ct => ct.IsAssignableFrom(rtype)))
{
EmitCustomActionCall();
ilgen.MarkLabel(exit);
return(XamlIlNodeEmitResult.Void(1));
}
var callCustomLabel = ilgen.DefineLabel();
var afterCustomLabel = ilgen.DefineLabel();
foreach (var ct in customTypes)
{
codeGen
.Ldloc(resultLocal)
.Isinst(ct)
.Brtrue(callCustomLabel);
}
ilgen
.Br(afterCustomLabel)
.MarkLabel(callCustomLabel);
EmitCustomActionCall();
ilgen.MarkLabel(afterCustomLabel);
}
TypeSystemHelpers.EmitConvert(context, node, rtype, ptype,
lda => ilgen.Emit(lda ? OpCodes.Ldloca : OpCodes.Ldloc, resultLocal));
// Call some method either on the target or on target's property
if (me.Manipulation != null)
{
// {target}.{Property}.{Method)(res)
if (me.Property != null)
{
using (var res = context.GetLocal(ptype))
ilgen
.Emit(OpCodes.Stloc, res.Local)
.EmitCall(me.Property.Getter)
.Emit(OpCodes.Ldloc, res.Local);
}
me.Manipulation.Emit(context, ilgen, true);
}
// Call property setter on the target
else
{
ilgen.EmitCall(me.Property.Setter);
}
ilgen.MarkLabel(exit);
}
return(XamlIlNodeEmitResult.Void(1));
}
