/// <summary>
/// Calculates a new resource path based on the supplied
/// <paramref name="relativePath"/>.
/// </summary>
/// <param name="relativePath">
/// The relative path to evaluate.
/// </param>
/// <returns>The newly calculated resource path.</returns>
private string CalculateResourcePath(string relativePath)
{
StringBuilder path = new StringBuilder(256);
if (relativePath.StartsWith("..")) // back level navigation
{
string[] pathElements = ResourcePath.Split(PathSeparatorChars);
int upWalks = UpWalks(relativePath);
if (upWalks > pathElements.Length)
{
throw new UriFormatException("Too many back levels.");
}
char separator = PathSeparatorChars[0];
for (int i = 0; i < pathElements.Length - upWalks; i++)
{
path.Append(pathElements[i]).Append(separator);
}
string[] relativeParts = relativePath.Split('/', '\\');
for (int i = upWalks; i < relativeParts.Length - 1; i++)
{
path.Append(relativeParts[i]).Append(separator);
}
if (path.Length > 0)
{
path.Length -= 1;
}
return(path.ToString());
}
else if (relativePath.StartsWith("/")) // relative to root
{
if (relativePath.Length > 1)
{
return(relativePath.Substring(1, relativePath.Length - 2));
}
else
{
return(null);
}
}
else // relative to current namespace...
{
if (ResourcePath != null && ResourcePath != String.Empty)
{
path.Append(ResourcePath.TrimEnd(PathSeparatorChars)).Append(PathSeparatorChars[0]);
}
if (relativePath.StartsWith("./"))
{
if (relativePath.Length > 2)
{
path.Append(relativePath.Substring(2, relativePath.Length - 3));
}
}
else
{
path.Append(relativePath.Substring(0, relativePath.Length - 1));
}
return(path.ToString());
}
}