internal HelpTopicCollection(HelpDatabase database)
{
if (database == null)
{
throw new ArgumentNullException(nameof(database));
}
m_database = database;
}
/// <summary>
/// Resolves the given uri in the current help system.
/// </summary>
/// <param name="referrer"></param>
/// <param name="uri"></param>
/// <returns>
/// The topic pointed to by the uri, or <c>null</c> if one cannot be
/// found.
/// </returns>
public HelpTopic ResolveUri(HelpDatabase referrer, HelpUri uri)
{
if (uri == null)
{
throw new ArgumentNullException(nameof(uri));
}
HelpUriType uriType = uri.Type;
if (uriType == HelpUriType.LocalTopic)
{
if (referrer != null)
{
int topicIndex = uri.TopicIndex;
if (topicIndex >= 0 && topicIndex < referrer.Topics.Count)
{
return(referrer.Topics[topicIndex]);
}
}
}
else if (uriType == HelpUriType.GlobalContext)
{
string dbName = uri.DatabaseName;
HelpDatabase db = FindDatabase(dbName);
if (db != null)
{
return(db.ResolveContext(uri.ContextString));
}
}
else if (uriType == HelpUriType.LocalContext)
{
if (referrer != null)
{
return(referrer.ResolveContext(uri.ContextString));
}
}
else if (uriType == HelpUriType.Context)
{
if (referrer != null)
{
HelpTopic topic = referrer.ResolveContext(uri.ContextString);
if (topic != null)
{
return(topic);
}
}
foreach (HelpDatabase db in databases)
{
HelpTopic topic = db.ResolveContext(uri.ContextString);
if (topic != null)
{
return(topic);
}
}
return(null);
}
return(null);
}