protected ModuleProcessorBase([NotNull] ModuleWeaver moduleWeaver)
{
if (moduleWeaver == null)
{
throw new ArgumentNullException("moduleWeaver");
}
_moduleWeaver = moduleWeaver;
_assets = _moduleWeaver.Assets;
_moduleDefinition = _moduleWeaver.ModuleDefinition;
_settings = _moduleWeaver.Settings;
}
protected TypeProcessorBase(TypeDefinition type, ModuleWeaver moduleWeaver)
{
if (type == null)
{
throw new ArgumentNullException("type");
}
if (moduleWeaver == null)
{
throw new ArgumentNullException("moduleWeaver");
}
_type = type;
_moduleWeaver = moduleWeaver;
_assets = _moduleWeaver.Assets;
}
public static MethodDefinition CreateAddEventMethod(this TypeDefinition targetType, string eventName,
TypeReference eventType, Assets assets, Action<ILProcessor> methodBodyWriter = null)
{
var method = new MethodDefinition("add_"+eventName,
MethodAttributes.Final | MethodAttributes.HideBySig | MethodAttributes.SpecialName | MethodAttributes.NewSlot |
MethodAttributes.Virtual | MethodAttributes.Public,
assets.TypeReferences.Void)
{
Body = { InitLocals = true }
};
var eventHandlerParameter = new ParameterDefinition("value", ParameterAttributes.None, assets.TypeReferences.EventHandler);
method.Parameters.Add(eventHandlerParameter);
var il = method.Body.GetILProcessor();
if (methodBodyWriter == null)
{
var varDef0 = new VariableDefinition(eventType);
method.Body.Variables.Add(varDef0);
var varDef1 = new VariableDefinition(eventType);
method.Body.Variables.Add(varDef1);
var varDef2 = new VariableDefinition(eventType);
method.Body.Variables.Add(varDef2);
var varDef3 = new VariableDefinition(assets.TypeReferences.Boolean);
method.Body.Variables.Add(varDef3);
var field = targetType.Fields.FirstOrDefault(fld => fld.Name == eventName);
if (field == null)
{
assets.Log.LogInfo(string.Format("Adding field {0} to {1} in CreateAddEventMethod.",
eventName,
targetType.FullName));
field = targetType.AddField(eventType, eventName);
}
Instruction loopStart;
il.Append(il.Create(OpCodes.Nop));
il.Append(il.Create(OpCodes.Ldarg_0));
il.Append(il.Create(OpCodes.Ldfld, field));
il.Append(il.Create(OpCodes.Stloc_0));
il.Append(loopStart = il.Create(OpCodes.Ldloc_0));
il.Append(il.Create(OpCodes.Stloc_1));
il.Append(il.Create(OpCodes.Ldloc_1));
il.Append(il.Create(OpCodes.Ldarg_1));
il.Append(il.Create(OpCodes.Call, assets.DelegateCombineMethodReference));
il.Append(il.Create(OpCodes.Castclass, eventType));
il.Append(il.Create(OpCodes.Stloc_2));
il.Append(il.Create(OpCodes.Ldarg_0));
il.Append(il.Create(OpCodes.Ldflda, field));
il.Append(il.Create(OpCodes.Ldloc_2));
il.Append(il.Create(OpCodes.Ldloc_1));
il.Append(il.Create(OpCodes.Call, assets.InterlockedCompareExchangeOfEventHandler));
il.Append(il.Create(OpCodes.Stloc_0));
il.Append(il.Create(OpCodes.Ldloc_0));
il.Append(il.Create(OpCodes.Ldloc_1));
il.Append(il.Create(OpCodes.Ceq));
il.Append(il.Create(OpCodes.Ldc_I4_0));
il.Append(il.Create(OpCodes.Ceq));
il.Append(il.Create(OpCodes.Stloc_3));
il.Append(il.Create(OpCodes.Ldloc_3));
il.Append(il.Create(OpCodes.Brtrue_S, loopStart));
il.Append(il.Create(OpCodes.Ret));
}
else
{
methodBodyWriter(il);
}
return method;
}
private void Setup()
{
Settings = new ModuleWeaverSettings(Config);
Assets = new Assets(this);
}
private static MethodDefinition CreateCanExecuteChangedRemoveMethod(this TypeDefinition typeDefinition, Assets assets)
{
Action <ILProcessor> methodBodyWriter = null;
if (assets.CommandManagerAddRequerySuggestedMethodReference != null)
{
methodBodyWriter = il =>
{
il.Append(il.Create(OpCodes.Ldarg_1));
il.Append(il.Create(OpCodes.Call, assets.CommandManagerRemoveRequerySuggestedMethodReference));
il.Append(il.Create(OpCodes.Nop));
il.Append(il.Create(OpCodes.Ret));
};
}
var method = typeDefinition.CreateRemoveEventMethod(
"CanExecuteChanged",
assets.TypeReferences.EventHandler,
assets,
methodBodyWriter
);
return(method);
}
