private string StartLinkHandler(string[] startTagComponents)
{
string url = startTagComponents[0];
string extras = "";
try
{
if (Path.GetExtension(url).Equals(Constants.TopicExtension, StringComparison.InvariantCultureIgnoreCase))
{
int colonPos = url.IndexOf("::");
if (colonPos >= 0) // a link to another help document
{
string document = url.Substring(0, colonPos);
string topic = url.Substring(colonPos + 2);
_helpComponents.preprocessor.CheckExternalTopic(document, topic);
url = _topicCompilerSettings.ConstructLink(LinkType.ExternalTopic, new string[] { document, topic }, ref extras);
}
else
{
Preprocessor.TopicPreprocessor topic = _helpComponents.preprocessor.GetTopic(startTagComponents[0]);
url = _topicCompilerSettings.ConstructLink(LinkType.Topic, topic, ref extras);
}
}
else if ((url.IndexOf("http", StringComparison.InvariantCultureIgnoreCase) == 0) ||
(url.IndexOf("mailto", StringComparison.InvariantCultureIgnoreCase) == 0))
{
url = _topicCompilerSettings.ConstructLink(LinkType.Other, url, ref extras);
}
else
{
throw new Exception("Link could not be processsed");
}
}
catch (Exception exception) // the topic wasn't found
{
throw new Exception(String.Format("The topic {0} is invalid ({1})", url, exception.Message));
}
return(String.Format("<a href=\"{0}\" {1}>", url, extras));
}
