/// <summary>
/// Resolves the specified tag.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="chunk">The chunk.</param>
/// <returns>A <see cref="Resolution" />.</returns>
// ReSharper disable once CodeAnnotationAnalyzer
public override object Resolve(FormatWriteContext context, FormatChunk chunk)
{
Resolution resolution;
// ReSharper disable once PossibleNullReferenceException
string tag = chunk.Tag;
Debug.Assert(tag != null);
if (ResolveControls || !chunk.IsControl)
{
if ((_values == null || !_values.TryGetValue(tag, out resolution)))
{
// Get the resolution using the resolver.
object result = _resolver(context, chunk);
resolution = result as Resolution? ?? new Resolution(result);
if (!resolution.NoCache)
{
// Cache the resolution.
if (_values == null)
{
_values =
new Dictionary <string, Resolution>(
IsCaseSensitive
? StringComparer.CurrentCulture
: StringComparer.CurrentCultureIgnoreCase);
}
// ReSharper disable once AssignNullToNotNullAttribute
_values[tag] = resolution;
}
}
}
else
{
resolution = (Resolution)Resolution.Unknown;
}
// If we don't have a resolution, ask the parent.
if (!resolution.IsResolved &&
ResolveOuterTags &&
Parent != null)
{
// ReSharper disable once PossibleNullReferenceException
resolution = (Resolution)Parent.Resolve(context, chunk);
}
return(resolution);
}