internal static void CloneInto(CloningContext context, ref object clone, object original)
{
if (original == null)
{
clone = null;
return;
}
var type = original.GetType();
if (Skippable(type))
{
clone = original;
return;
}
if (context.clonings.ContainsKey(original))
{
clone = context.clonings[original];
return;
}
var cloner = GetCloner(original, type, context.fallbackCloner);
if (clone == null)
{
clone = cloner.ConstructClone(type, original);
}
context.clonings.Add(original, clone);
cloner.BeforeClone(type, original);
cloner.FillClone(type, ref clone, original, context);
cloner.AfterClone(type, clone);
context.clonings[original] = clone; // In case the reference changed, for example in arrays
}
public static object Clone(this object original, ICloner fallbackCloner, bool tryPreserveInstances)
{
using (var context = CloningContext.New(fallbackCloner, tryPreserveInstances))
{
return(Clone(context, original));
}
}
internal static object Clone(CloningContext context, object original)
{
object clone = null;
CloneInto(context, ref clone, original);
return(clone);
}
void ICloner.FillClone(Type type, ref object clone, object original, CloningContext context)
{
var _instance = (T)clone;
FillClone(type, ref _instance, (T)original, context);
clone = _instance;
}
public override void FillClone(Type type, ref IList clone, IList original, CloningContext context)
{
if (context.tryPreserveInstances)
{
for (int i = 0; i < original.Count; i++)
{
var originalItem = original[i];
if (i < clone.Count)
{
// The clone has at least as many items, we can try to preserve its instances.
var cloneItem = clone[i];
Cloning.CloneInto(context, ref cloneItem, originalItem);
clone[i] = cloneItem;
}
else
{
// The clone has less items than the original, we have to add a new item.
clone.Add(Cloning.Clone(context, originalItem));
}
}
}
else
{
// Avoiding foreach to avoid enumerator allocation
for (int i = 0; i < original.Count; i++)
{
var originalItem = original[i];
clone.Add(Cloning.Clone(context, originalItem));
}
}
}
public override void FillClone(Type type, ref object clone, object original, CloningContext context)
{
if (PlatformUtility.supportsJit)
{
foreach (var accessor in GetOptimizedAccessors(type))
{
if (context.tryPreserveInstances)
{
var cloneProperty = accessor.GetValue(clone);
Cloning.CloneInto(context, ref cloneProperty, accessor.GetValue(original));
accessor.SetValue(clone, cloneProperty);
}
else
{
accessor.SetValue(clone, Cloning.Clone(context, accessor.GetValue(original)));
}
}
}
else
{
foreach (var accessor in GetAccessors(type))
{
if (accessor is FieldInfo)
{
var field = (FieldInfo)accessor;
if (context.tryPreserveInstances)
{
var cloneProperty = field.GetValue(clone);
Cloning.CloneInto(context, ref cloneProperty, field.GetValue(original));
field.SetValue(clone, cloneProperty);
}
else
{
field.SetValue(clone, Cloning.Clone(context, field.GetValue(original)));
}
}
else if (accessor is PropertyInfo)
{
var property = (PropertyInfo)accessor;
if (context.tryPreserveInstances)
{
var cloneProperty = property.GetValue(clone, null);
Cloning.CloneInto(context, ref cloneProperty, property.GetValue(original, null));
property.SetValue(clone, cloneProperty, null);
}
else
{
property.SetValue(clone, Cloning.Clone(context, property.GetValue(original, null)), null);
}
}
}
}
}
public override void FillClone(Type type, ref Array clone, Array original, CloningContext context)
{
var length = original.GetLength(0);
clone = Array.CreateInstance(type.GetElementType(), length);
for (int i = 0; i < length; i++)
{
clone.SetValue(Cloning.Clone(context, original.GetValue(i)), i);
}
}
public virtual void FillClone(Type type, ref T clone, T original, CloningContext context)
{
}
public override void FillClone(Type type, ref VariableDeclarations clone, VariableDeclarations original, CloningContext context)
{
foreach (var variable in original)
{
clone[variable.name] = variable.value.CloneViaFakeSerialization();
}
}
public override void FillClone(Type type, ref IEnumerable clone, IEnumerable original, CloningContext context)
{
var addMethod = GetAddMethod(type);
if (addMethod == null)
{
throw new InvalidOperationException($"Cannot instantiate enumerable type '{type}' because it does not provide an add method.");
}
// No way to preserve instances here
foreach (var item in original)
{
addMethod.Invoke(item, Cloning.Clone(context, item));
}
}
public override void FillClone(Type type, ref IDictionary clone, IDictionary original, CloningContext context)
{
// No support for instance preservation here, but none in FS either, so it shouldn't matter
var originalEnumerator = original.GetEnumerator();
while (originalEnumerator.MoveNext())
{
var originalKey = originalEnumerator.Key;
var originalValue = originalEnumerator.Value;
var cloneKey = Cloning.Clone(context, originalKey);
var cloneValue = Cloning.Clone(context, originalValue);
clone.Add(cloneKey, cloneValue);
}
}
public override void FillClone(Type type, ref AnimationCurve clone, AnimationCurve original, CloningContext context)
{
for (int i = 0; i < clone.length; i++)
{
clone.RemoveKey(i);
}
foreach (var key in original.keys)
{
clone.AddKey(key);
}
}
