/// <summary>
/// Find Natvis visualizer by variable.
/// </summary>
public VisualizerInfo FindType(IVariableInformation variable)
{
// Check for custom visualizers first.
if (variable.CustomVisualizer != CustomVisualizer.None)
{
// Custom visualizers are keyed by pseudo-types "$" + CustomVisualizer enum name.
string pseudoTypeName = "$" + variable.CustomVisualizer;
VisualizerInfo visualizer;
if (_visualizerCache.TryGetValue(pseudoTypeName, out visualizer))
{
_logger.Verbose(() => $"Selected cached custom Natvis Visualizer " +
$"'{visualizer?.Visualizer.Name ?? "null"} '" +
$"for custom visualizer '{variable.CustomVisualizer}'");
return(visualizer);
}
visualizer = Scan(pseudoTypeName, TypeName.Parse(pseudoTypeName));
if (visualizer != null)
{
_logger.Verbose(() => $"Selected Natvis Visualizer " +
$"'{visualizer.Visualizer.Name}'" +
$" for custom visualizer '{variable.CustomVisualizer}'");
return(visualizer);
}
}
string initialTypeName = variable.TypeName;
_logger.Verbose($"Finding Natvis Visualizer for type '{initialTypeName}'");
if (_visualizerCache.ContainsKey(initialTypeName))
{
VisualizerInfo visualizer = _visualizerCache[variable.TypeName];
_logger.Verbose(() => $"Selected cached Natvis Visualizer " +
$"'{visualizer?.Visualizer.Name ?? "null"}' for type " +
$"'{initialTypeName}'");
return(visualizer);
}
uint count = 0;
foreach (string typeName in variable.GetAllInheritedTypes())
{
var parsedName = TypeName.Parse(typeName);
if (parsedName == null)
{
break;
}
_logger.Verbose(
() => $"Scanning for Natvis Visualizer for type '{parsedName.BaseName}' for " +
$"variable of type '{initialTypeName}'");
VisualizerInfo visualizer = Scan(initialTypeName, parsedName);
if (visualizer != null)
{
_logger.Verbose(
() => $"Selected Natvis Visualizer '{visualizer.Visualizer.Name}'" +
$" for type '{initialTypeName}'");
return(visualizer);
}
++count;
// Safety check to make sure we don't get in to an expensive loop.
if (count > _maxInheritedTypes)
{
_logger.Warning($"The '{initialTypeName}' type exceeds the" +
$" maximum number ({_maxInheritedTypes}) of searchable base " +
$"classes.");
break;
}
}
_logger.Verbose($"No Natvis Visualizer found for type '{initialTypeName}'");
return(null);
}