private bool TryInvokeGetIterator(IObjectValueRole <TValue> serializedObjectRole,
IValueFetchOptions options,
out IObjectValueRole <TValue> returnedSerializedPropertyRole)
{
returnedSerializedPropertyRole = null;
var method = MetadataTypeLiteEx.LookupInstanceMethodSafe(serializedObjectRole.ReifiedType.MetadataType,
MethodSelectors.SerializedObject_GetIterator, false);
if (method == null)
{
myLogger.Warn("Cannot find GetIterator method on SerializedObject");
return(false);
}
returnedSerializedPropertyRole = new SimpleValueReference <TValue>(
serializedObjectRole.CallInstanceMethod(method),
serializedObjectRole.ValueReference.OriginatingFrame, myValueServices.RoleFactory)
.AsObjectSafe(options);
if (returnedSerializedPropertyRole == null)
{
myLogger.Warn("Unable to invoke GetIterator");
return(false);
}
return(true);
}
private bool TryCopySerializedProperty(IObjectValueRole <TValue> serializedPropertyRole,
IValueFetchOptions options,
out IObjectValueRole <TValue> copiedSerializedPropertyRole)
{
copiedSerializedPropertyRole = null;
// Get a copy of the property, so we can call Next(true) without updating the current instance
var copyMethod = MetadataTypeLiteEx.LookupInstanceMethodSafe(
mySerializedPropertyRole.ReifiedType.MetadataType,
MethodSelectors.SerializedProperty_Copy, false);
if (copyMethod == null)
{
myLogger.Warn("Cannot find Copy method on SerializedProperty");
return(false);
}
// CallInstanceMethod always returns not null (VoidValue if it fails)
copiedSerializedPropertyRole = new SimpleValueReference <TValue>(
serializedPropertyRole.CallInstanceMethod(copyMethod),
mySerializedPropertyRole.ValueReference.OriginatingFrame, myValueServices.RoleFactory)
.AsObjectSafe(options);
if (copiedSerializedPropertyRole == null)
{
myLogger.Warn("Unable to Copy serializedProperty");
return(false);
}
return(true);
}
private IEnumerable <IValueEntity> GetChildrenImpl(IPresentationOptions options, CancellationToken token)
{
myGetElementMethod = MetadataTypeLiteEx.LookupInstanceMethodSafe(mySerializedPropertyRole.ReifiedType.MetadataType,
myGetMethodElementSelector, false);
if (myGetElementMethod == null)
{
myLogger.Warn("Cannot find GetArrayElementAtIndex/GetFixedBufferElementAtIndex method");
yield break;
}
if (options.ClusterArrays)
{
foreach (var valueEntity in GetChunkedChildren(mySerializedPropertyRole, 0, myArraySize, options, token))
{
yield return(valueEntity);
}
}
else
{
for (var i = 0; i < myArraySize; i++)
{
token.ThrowIfCancellationRequested();
yield return(GetElementValueAt(mySerializedPropertyRole, i, options));
}
}
}
private IEnumerable <IValueEntity> GetChildrenImpl(IValueFetchOptions options, CancellationToken token)
{
// SerializedProperty is a view over a serialized stream. Calling Next() or GetEnumerator().MoveNext()
// will update this view. We need to work with copies, so that the original value isn't updated
if (!TryCopySerializedProperty(mySerializedPropertyRole, options, out var cursor))
{
yield break;
}
// Get the depth of this "parent" property. We'll call Next() until children's depth changes
if (!Util.TryEvaluatePrimitiveProperty(cursor, "depth", options, out int initialDepth))
{
myLogger.Warn("Unable to evaluate initial depth on serializedProperty");
yield break;
}
var nextMethod = MetadataTypeLiteEx.LookupInstanceMethodSafe(cursor.ReifiedType.MetadataType,
MethodSelectors.SerializedProperty_Next, false);
if (nextMethod == null)
{
myLogger.Warn("Cannot find Next method on SerializedProperty");
yield break;
}
var trueValue = myValueServices.ValueFactory.CreatePrimitive(
mySerializedPropertyRole.ValueReference.OriginatingFrame, options, true);
var falseValue = myValueServices.ValueFactory.CreatePrimitive(
mySerializedPropertyRole.ValueReference.OriginatingFrame, options, false);
// Call cursor.Next(true). Our cursor is now a view over the first child
if (!TryInvokeNext(cursor, nextMethod, trueValue, options, out var nextResult))
{
yield break;
}
var count = 0;
while (nextResult)
{
token.ThrowIfCancellationRequested();
if (!Util.TryEvaluatePrimitiveProperty(cursor, "depth", options, out int thisDepth))
{
myLogger.Warn("Unable to evaluate initial depth on serializedProperty");
yield break;
}
// SerializedProperties are a view on a stream of serialised objects (not the C# objects!). Children
// are simply the next node in the stream, but they have a depth set to current depth + 1. Iterating
// children has finished when the next node's depth is set back to current depth.
if (thisDepth != initialDepth + 1)
{
break;
}
// Yield a copy of the current instance
if (!TryCopySerializedProperty(cursor, options, out var copiedSerializedPropertyRole))
{
myLogger.Warn("Failed to copy current serialised property");
break;
}
var name = copiedSerializedPropertyRole.GetInstancePropertyReference("name")
?.AsStringSafe(options)?.GetString() ?? $"prop{count}";
// Tell the value presenter to hide the name field, because we're using it for the key name. Also
// hide the default presentation. Of course it's a SerializedProperty, it's a child of a
// SerializedProperty
yield return(new CalculatedValueReferenceDecorator <TValue>(
copiedSerializedPropertyRole.ValueReference, myValueServices.RoleFactory, name, false,
false)
.ToValue(myValueServices));
// MoveNext(false). cursor is now viewing either the next child or a sibling of the original
// property, or is at the end of the stream (nextResult is false). If this evaluation fails,
// we've already logged and nextResult is already false, so we don't need extra error handling
TryInvokeNext(cursor, nextMethod, falseValue, options, out nextResult);
count++;
}
}
