private void FormatError(FormatItem errorItem, Exception innerException, int startIndex,
FormattingInfo formattingInfo)
{
OnFormattingFailure?.Invoke(this,
new FormattingErrorEventArgs(errorItem.RawText, startIndex,
Settings.FormatErrorAction != ErrorAction.ThrowError));
switch (Settings.FormatErrorAction)
{
case ErrorAction.Ignore:
return;
case ErrorAction.ThrowError:
throw innerException as FormattingException ??
new FormattingException(errorItem, innerException, startIndex);
case ErrorAction.OutputErrorInResult:
formattingInfo.FormatDetails.FormattingException =
innerException as FormattingException ??
new FormattingException(errorItem, innerException, startIndex);
formattingInfo.Write(innerException.Message);
formattingInfo.FormatDetails.FormattingException = null;
break;
case ErrorAction.MaintainTokens:
formattingInfo.Write(formattingInfo.Placeholder?.RawText ?? "'null'");
break;
}
}
/// <summary>
/// Format the <see cref="FormattingInfo" /> argument.
/// </summary>
/// <param name="formattingInfo"></param>
public void Format(FormattingInfo formattingInfo)
{
// Before we start, make sure we have at least one source extension and one formatter extension:
CheckForExtensions();
if (formattingInfo.Format is null)
{
return;
}
foreach (var item in formattingInfo.Format.Items)
{
if (item is LiteralText literalItem)
{
formattingInfo.Write(literalItem.ToString());
continue;
}
// Otherwise, the item must be a placeholder.
var placeholder = (Placeholder)item;
var childFormattingInfo = formattingInfo.CreateChild(placeholder);
try
{
EvaluateSelectors(childFormattingInfo);
}
catch (Exception ex)
{
// An error occurred while evaluation selectors
var errorIndex = placeholder.Format?.startIndex ?? placeholder.Selectors.Last().endIndex;
FormatError(item, ex, errorIndex, childFormattingInfo);
continue;
}
try
{
EvaluateFormatters(childFormattingInfo);
}
catch (Exception ex)
{
// An error occurred while evaluating formatters
var errorIndex = placeholder.Format?.startIndex ?? placeholder.Selectors.Last().endIndex;
FormatError(item, ex, errorIndex, childFormattingInfo);
}
}
}