/// <summary>
/// Find the closest template in the base cache to the input template.
/// </summary>
private CachedTag FindClosestTemplate(CachedTag sourceRmt2Tag, RenderMethodTemplate sourceRmt2)
{
Debug.Assert(IsInitialized);
Rmt2Descriptor sourceRmt2Desc;
if (!Rmt2Descriptor.TryParse(sourceRmt2Tag.Name, out sourceRmt2Desc))
{
throw new ArgumentException($"Invalid rmt2 name '{sourceRmt2Tag.Name}'", nameof(sourceRmt2Tag));
}
var relevantRmt2s = new List <Rmt2Pairing>();
foreach (var rmt2Tag in BaseCache.TagCache.NonNull().Where(tag => tag.IsInGroup("rmt2")))
{
Rmt2Descriptor destRmt2Desc;
if (!Rmt2Descriptor.TryParse(rmt2Tag.Name, out destRmt2Desc))
{
continue;
}
// ignore ms30 templates if desired
if (!UseMs30 && destRmt2Desc.IsMs30)
{
continue;
}
// ignore templates that are not of the same type
if (destRmt2Desc.Type != sourceRmt2Desc.Type)
{
continue;
}
// match the options from the rmt2 tag names
int commonOptions = 0;
for (int i = 0; i < sourceRmt2Desc.Options.Length; i++)
{
if (sourceRmt2Desc.Options[i] == destRmt2Desc.Options[i])
{
commonOptions++;
}
}
// if we found an exact match, return it
if (commonOptions == sourceRmt2Desc.Options.Length)
{
return(rmt2Tag);
}
// add it to the list to be considered
relevantRmt2s.Add(new Rmt2Pairing()
{
CommonOptions = commonOptions,
DestTag = rmt2Tag,
SourceTag = sourceRmt2Tag
});
}
// if we've reached here, we haven't found an extract match.
// now we need to consider other factors such as which options they have, which parameters are missing etc..
// whatever can be used to narrow it down.
foreach (var pairing in relevantRmt2s)
{
var rmt2 = GetTemplate(pairing.DestTag);
pairing.RealParams = MatchParameterBlocks(sourceRmt2.RealParameterNames, rmt2.RealParameterNames);
pairing.IntParams = MatchParameterBlocks(sourceRmt2.IntegerParameterNames, rmt2.IntegerParameterNames);
pairing.BoolParams = MatchParameterBlocks(sourceRmt2.BooleanParameterNames, rmt2.BooleanParameterNames);
pairing.TextureParams = MatchParameterBlocks(sourceRmt2.TextureParameterNames, rmt2.TextureParameterNames);
}
// finally order by some criteria
var ordered = relevantRmt2s
.OrderBy(x => x.CommonOptions);
//.ThenByDescending(x => x.MissingFromDest);
// return the best rmt2 or the default if one could not be found (only when a template type is not in the base cache)
var bestRmt2 = ordered.LastOrDefault()?.DestTag;
if (bestRmt2 == null)
{
return(BaseCache.GetTag(DefaultTemplate));
}
return(bestRmt2);
}