private string FormatCore(string format, NdArray<T> array,
IFormatProvider formatProvider, string typeName)
{
var cfg = string.IsNullOrEmpty(format)
? NdArrayFormatConfig.GetDefault(array.Rank)
: new NdArrayFormatConfig(format);
NdArray<string> texts;
{
string elementToString(T x)
=> x is IFormattable y
? y.ToString(cfg.ElementFormat, formatProvider)
: x?.ToString() ?? "";
var tmp = array.AsEnumerable().Select(elementToString).ToArray();
var maxlen = tmp.Select(x => x.Length).Max();
for(var i = 0 ; i < tmp.Length ; ++i)
tmp[i] = tmp[i].PadLeft(maxlen, ' ');
texts = NdArray.Create(tmp, array.Shape);
}
var baseIndent = new string(' ', typeName.Length + 1);
var result = new StringBuilder();
switch(cfg.Options)
{
case FormatOption.OutputsElementType:
result.AppendLine($"{typeName}(Type={typeof(T).Name},");
result.Append(baseIndent);
break;
case FormatOption.OutputsShapeSummary:
result.AppendLine($"{typeName}(Shape={array.Shape},");
result.Append(baseIndent);
break;
case FormatOption.OutputsElementType | FormatOption.OutputsShapeSummary:
result.AppendLine($"{typeName}(Type={typeof(T).Name}, Shape={array.Shape},");
result.Append(baseIndent);
break;
default:
result.Append($"{typeName}(");
break;
}
var contentLines = ToStringRect(texts, cfg.GetFilledAxesLimits(array.Rank),
cfg.LineWidth - typeName.Length - 1);
var content = string.Join("\r\n" + baseIndent, contentLines);
result.Append(content);
result.Append(')');
return result.ToString();
}
