public static string GetFullUrl(string text, string sourceFilename)
{
if (string.IsNullOrEmpty(text))
{
return(null);
}
text = text.Trim(new[] { '\'', '"', '~' });
if (text.StartsWith("//", StringComparison.Ordinal))
{
text = "http:" + text;
}
if (text.Contains("://") || text.StartsWith("data:", StringComparison.Ordinal))
{
return(text);
}
if (string.IsNullOrEmpty(sourceFilename))
{
return(null);
}
text = Uri.UnescapeDataString(text);
return(ProjectHelpers.ToAbsoluteFilePath(text, sourceFilename));
}
