public bool CanPerform(Type target, Operation restrictTo = Operation.All)
{
Operation oldAllowedOp = this.allowedOp;
this.allowedOp = oldAllowedOp & restrictTo;
// Convert ContentRef requests to their respective Resource-requests
target = ResTypeFromRefType(target);
if (this.checkedTypes.Contains(target))
{
this.allowedOp = oldAllowedOp;
return(false);
}
this.curComplexity++;
this.checkedTypes.Add(target);
bool result = false;
if (!result && this.data.GetDataPresent(target))
{
result = true;
}
if (!result && this.data.GetDataPresent(target.MakeArrayType()))
{
result = true;
}
if (!result && this.data.ContainsContentRefs(target))
{
result = true;
}
if (!result && this.data.ContainsComponentRefs(target))
{
result = true;
}
if (!result)
{
result = CorePluginRegistry.GetDataConverters(target).Any(s => !this.usedConverters.Contains(s) && s.CanConvertFrom(this));
}
if (result || this.allowedOp != oldAllowedOp)
{
this.checkedTypes.Remove(target);
}
this.maxComplexity = Math.Max(this.maxComplexity, this.curComplexity);
this.curComplexity--;
this.allowedOp = oldAllowedOp;
return(result);
}
public IEnumerable <object> Perform(Type target, Operation restrictTo = Operation.All)
{
Operation oldAllowedOp = this.allowedOp;
this.allowedOp = oldAllowedOp & restrictTo;
// Convert ContentRef requests to their respective Resource-requests
Type originalType = target;
target = ResTypeFromRefType(target);
//Log.Editor.Write("Convert to {0}", target.Name);
bool fittingDataFound = false;
// Check if there already is fitting data available
IEnumerable <object> fittingData = null;
if (fittingData == null)
{
// Single object
if (this.data.GetDataPresent(target))
{
fittingData = new[] { this.data.GetData(target) }
}
;
}
if (fittingData == null)
{
// Object array
Type arrType = target.MakeArrayType();
if (this.data.GetDataPresent(arrType))
{
fittingData = this.data.GetData(arrType) as IEnumerable <object>;
}
}
if (fittingData == null)
{
// ComponentRefs
if (this.data.ContainsComponentRefs(target))
{
fittingData = this.data.GetComponentRefs(target);
}
}
if (fittingData == null)
{
// ContentRefs
if (this.data.ContainsContentRefs(target))
{
fittingData = this.data.GetContentRefs(target).Res();
}
}
// If something fitting was found, directly add it to the operation results
if (fittingData != null)
{
fittingDataFound = true;
foreach (object obj in fittingData)
{
this.AddResult(obj);
}
}
// No result yet? Search suitable converters
if (!fittingDataFound)
{
var converterQuery = CorePluginRegistry.GetDataConverters(target);
List <ConvComplexityEntry> converters = new List <ConvComplexityEntry>();
foreach (var c in converterQuery)
{
this.maxComplexity = 0;
if (this.usedConverters.Contains(c))
{
continue;
}
if (!c.CanConvertFrom(this))
{
continue;
}
converters.Add(new ConvComplexityEntry(c, this.maxComplexity));
}
// Perform conversion
converters.StableSort((c1, c2) => (c2.Converter.Priority - c1.Converter.Priority) * 10000 + (c1.Complexity - c2.Complexity));
foreach (var c in converters)
{
//Log.Editor.Write("using {0}", s.GetType().Name);
//Log.Editor.PushIndent();
//Log.Editor.Write("before: {0}", this.Result.ToString(o => string.Format("{0} {1}", o.GetType().Name, o), ", "));
this.usedConverters.Add(c.Converter);
bool handled = c.Converter.Convert(this);
this.usedConverters.Remove(c.Converter);
//Log.Editor.Write("after: {0}", this.Result.ToString(o => string.Format("{0} {1}", o.GetType().Name, o), ", "));
//Log.Editor.PopIndent();
if (handled)
{
break;
}
}
}
IEnumerable <object> returnValue = this.result;
// Convert back to Resource requests
if (typeof(IContentRef).IsAssignableFrom(originalType))
{
returnValue = result.OfType <Resource>().Select(r => r.GetContentRef());
}
returnValue = returnValue ?? (IEnumerable <object>)Array.CreateInstance(originalType, 0);
returnValue = returnValue.Where(originalType.IsInstanceOfType);
this.allowedOp = oldAllowedOp;
return(returnValue);
}