/// <inheritdoc />
public void WriteXml(XmlWriter writer)
{
writer.WriteAttributeString(nameof(LineBreaks), LineBreaks.ToString());
writer.WriteAttributeString(nameof(LineBreakTrimDirection), LineBreakTrimDirection.ToString());
}
/// <inheritdoc />
public string Apply(string value)
{
var breaksFound = 0;
if (LineBreaks == 0 && LineBreakTrimDirection.HasFlagFast(LineBreakTrimDirection.Begin))
{
for (int i = 0; i < value.Length; i++)
{
var c = value[i];
if (c == '\t')
{
continue;
}
if (c == ' ')
{
continue;
}
if (c == '\r' || c == '\n')
{
c = value[i + 1];
if (c == '\r' || c == '\n')
{
i++;
}
return(value.Substring(i + 1));
}
return(value.Substring(i));
}
return(value);
}
if (LineBreaks == 0 && LineBreakTrimDirection.HasFlagFast(LineBreakTrimDirection.End))
{
for (int i = value.Length - 1; i > 0; i--)
{
var c = value[i];
if (c == '\t')
{
continue;
}
if (c == ' ')
{
continue;
}
if (c == '\r' || c == '\n')
{
c = value[i - 1];
i--;
if (c == '\r' || c == '\n')
{
i--;
}
}
return(value.Substring(0, i + 1));
}
return(value);
}
if (LineBreaks == -1 && LineBreakTrimDirection.HasFlagFast(LineBreakTrimDirection.Begin))
{
return(value.TrimStart(Tokenizer.GetWhitespaceDelimiters()));
}
if (LineBreaks == -1 && LineBreakTrimDirection.HasFlagFast(LineBreakTrimDirection.End))
{
return(value.TrimEnd(Tokenizer.GetWhitespaceDelimiters()));
}
for (int i = 0; i < value.Length; i++)
{
var c = value[i];
if (Tokenizer.IsWhiteSpaceDelimiter(c))
{
if (LineBreaks == ++breaksFound)
{
if (value.Length + 1 >= i)
{
return(value.Substring(i + 1));
}
return(string.Empty);
}
}
else
{
return(value.Substring(i));
}
}
return(string.Empty);
}
/// <summary>
///
/// </summary>
/// <param name="value"></param>
/// <param name="flag"></param>
/// <returns></returns>
public static bool HasFlagFast(this LineBreakTrimDirection value, LineBreakTrimDirection flag)
{
return((value & flag) != 0);
}
