public static string StyleSubstring(this string str, string substring, MdStyle style,
bool firstOnly = false)
{
if (string.IsNullOrEmpty(str))
{
throw new System.ArgumentException("cannot stylize empty string", nameof(str));
}
if (string.IsNullOrEmpty(substring))
{
throw new System.ArgumentException("cannot stylize empty string", nameof(str));
}
if (!firstOnly)
{
return(str?.Replace(substring, MdText.Style(substring, style), System.StringComparison.Ordinal));
}
int pos = str.IndexOf(substring, System.StringComparison.Ordinal);
if (pos < 0)
{
return(str);
}
return(str.Substring(0, pos) + MdText.Style(substring, style)
+ str.Substring(pos + substring.Length));
}
/// <summary>
/// Styles one or more substrings of the provided string using the specified
/// <see cref="MdStyle"/>.
/// </summary>
/// <param name="str">The string containing the substring to style.</param>
/// <param name="substring">The substring to style.</param>
/// <param name="style">The Markdown style to apply.</param>
/// <param name="firstOnly">
/// If true, only the first occurrence of the substring is styled; otherwise, all
/// occurrences of the substring are styled.
/// </param>
/// <returns>
/// The selectively styled string. If <paramref name="str"/> does not contain any
/// occurrences of <paramref name="substring"/>, it is returned unchanged.
/// </returns>
public static string StyleSubstring(this string str, string substring, MdStyle style,
bool firstOnly = false)
{
if (!firstOnly)
{
return(str.Replace(substring, MdText.Style(substring, style)));
}
int pos = str.IndexOf(substring);
if (pos < 0)
{
return(str);
}
return(str.Substring(0, pos) + MdText.Style(substring, style)
+ str.Substring(pos + substring.Length));
}
