Dictionary<int, Action<XamlContext, XElement>> ExtractConnectionId(XamlContext ctx, MethodDef method) {
var context = new DecompilerContext(method.Module) {
CurrentType = method.DeclaringType,
CurrentMethod = method,
CancellationToken = ctx.CancellationToken
};
var body = new ILBlock(new ILAstBuilder().Build(method, true, context));
new ILAstOptimizer().Optimize(context, body);
var sw = body.GetSelfAndChildrenRecursive<ILSwitch>().FirstOrDefault();
if (sw == null)
return null;
var connIds = new Dictionary<int, Action<XamlContext, XElement>>();
foreach (var cas in sw.CaseBlocks) {
if (cas.Values == null)
continue;
Action<XamlContext, XElement> cb = null;
foreach (var node in cas.Body) {
var expr = node as ILExpression;
if (expr == null)
continue;
switch (expr.Code) {
case ILCode.Stfld:
cb += new FieldAssignment { FieldName = ((IField)expr.Operand).Name }.Callback;
break;
case ILCode.Call:
case ILCode.Callvirt:
var operand = (IMethod)expr.Operand;
if (operand.Name == "AddHandler" && operand.DeclaringType.FullName == "System.Windows.UIElement") {
// Attached event
var re = expr.Arguments[1];
var ctor = expr.Arguments[2];
var reField = re.Operand as IField;
if (re.Code != ILCode.Ldsfld || ctor.Code != ILCode.Newobj ||
ctor.Arguments.Count != 2 || ctor.Arguments[1].Code != ILCode.Ldftn) {
cb += new Error { Msg = "Attached event '" + reField.Name + "'." }.Callback;
break;
}
var handler = (IMethod)ctor.Arguments[1].Operand;
string evName = reField.Name;
if (evName.EndsWith("Event"))
evName = evName.Substring(0, evName.Length - 5);
cb += new EventAttachment {
AttachedType = reField.DeclaringType.ResolveTypeDefThrow(),
EventName = evName,
MethodName = handler.Name
}.Callback;
}
else {
// CLR event
var add = operand.ResolveMethodDefThrow();
var ev = add.DeclaringType.Events.FirstOrDefault(e => e.AddMethod == add);
var ctor = expr.Arguments[1];
if (ev == null || ctor.Code != ILCode.Newobj ||
ctor.Arguments.Count != 2 || ctor.Arguments[1].Code != ILCode.Ldftn) {
cb += new Error { Msg = "Attached event '" + add.Name + "'." }.Callback;
break;
}
var handler = (IMethod)ctor.Arguments[1].Operand;
cb += new EventAttachment {
EventName = ev.Name,
MethodName = handler.Name
}.Callback;
}
break;
}
}
if (cb != null) {
foreach (var id in cas.Values)
connIds[id] = cb;
}
}
return connIds.Count == 0 ? null : connIds;
}
Dictionary <int, Action <XamlContext, XElement> > ExtractConnectionId(XamlContext ctx, MethodDef method)
{
var context = new DecompilerContext(method.Module)
{
CurrentType = method.DeclaringType,
CurrentMethod = method,
CancellationToken = ctx.CancellationToken
};
var body = new ILBlock(new ILAstBuilder().Build(method, true, context));
new ILAstOptimizer().Optimize(context, body);
var sw = body.GetSelfAndChildrenRecursive <ILSwitch>().FirstOrDefault();
if (sw == null)
{
return(null);
}
var connIds = new Dictionary <int, Action <XamlContext, XElement> >();
foreach (var cas in sw.CaseBlocks)
{
if (cas.Values == null)
{
continue;
}
Action <XamlContext, XElement> cb = null;
foreach (var node in cas.Body)
{
var expr = node as ILExpression;
if (expr == null)
{
continue;
}
switch (expr.Code)
{
case ILCode.Stfld:
cb += new FieldAssignment {
FieldName = ((IField)expr.Operand).Name
}.Callback;
break;
case ILCode.Call:
case ILCode.Callvirt:
var operand = (IMethod)expr.Operand;
if (operand.Name == "AddHandler" && operand.DeclaringType.FullName == "System.Windows.UIElement")
{
// Attached event
var re = expr.Arguments[1];
var ctor = expr.Arguments[2];
var reField = re.Operand as IField;
if (re.Code != ILCode.Ldsfld || ctor.Code != ILCode.Newobj ||
ctor.Arguments.Count != 2 || ctor.Arguments[1].Code != ILCode.Ldftn)
{
cb += new Error {
Msg = string.Format(dnSpy_BamlDecompiler_Resources.Error_AttachedEvent, reField.Name)
}.Callback;
break;
}
var handler = (IMethod)ctor.Arguments[1].Operand;
string evName = reField.Name;
if (evName.EndsWith("Event"))
{
evName = evName.Substring(0, evName.Length - 5);
}
cb += new EventAttachment {
AttachedType = reField.DeclaringType.ResolveTypeDefThrow(),
EventName = evName,
MethodName = handler.Name
}.Callback;
}
else
{
// CLR event
var add = operand.ResolveMethodDefThrow();
var ev = add.DeclaringType.Events.FirstOrDefault(e => e.AddMethod == add);
var ctor = expr.Arguments[1];
if (ev == null || ctor.Code != ILCode.Newobj ||
ctor.Arguments.Count != 2 || ctor.Arguments[1].Code != ILCode.Ldftn)
{
cb += new Error {
Msg = string.Format(dnSpy_BamlDecompiler_Resources.Error_AttachedEvent, add.Name)
}.Callback;
break;
}
var handler = (IMethod)ctor.Arguments[1].Operand;
cb += new EventAttachment {
EventName = ev.Name,
MethodName = handler.Name
}.Callback;
}
break;
}
}
if (cb != null)
{
foreach (var id in cas.Values)
{
connIds[id] = cb;
}
}
}
return(connIds.Count == 0 ? null : connIds);
}
