/// <summary>
/// Collects data about URL protocol handlers indicated by registered application capabilities.
/// </summary>
/// <param name="capsKey">A registry key containing capability information for a registered application.</param>
/// <param name="commandMapper">Provides best-match command-line to <see cref="Command"/> mapping.</param>
/// <param name="capabilities">The capability list to add the collected data to.</param>
/// <exception cref="IOException">There was an error accessing the registry.</exception>
/// <exception cref="UnauthorizedAccessException">Read access to the registry was not permitted.</exception>
private static void CollectProtocolAssocsEx(RegistryKey capsKey, CommandMapper commandMapper, CapabilityList capabilities)
{
#region Sanity checks
if (capsKey == null)
{
throw new ArgumentNullException(nameof(capsKey));
}
if (commandMapper == null)
{
throw new ArgumentNullException(nameof(commandMapper));
}
if (capabilities == null)
{
throw new ArgumentNullException(nameof(capabilities));
}
#endregion
using var urlAssocKey = capsKey.OpenSubKey(DesktopIntegration.Windows.AppRegistration.RegSubKeyUrlAssocs);
if (urlAssocKey == null)
{
return;
}
foreach (string protocol in urlAssocKey.GetValueNames())
{
string?progID = urlAssocKey.GetValue(protocol)?.ToString();
if (string.IsNullOrEmpty(progID))
{
continue;
}
using var progIDKey = Registry.ClassesRoot.OpenSubKey(progID);
if (progIDKey == null)
{
continue;
}
var prefix = new KnownProtocolPrefix {
Value = protocol
};
var existing = capabilities.GetCapability <UrlProtocol>(progID);
if (existing == null)
{
var capability = new UrlProtocol
{
ID = progID,
Descriptions = { progIDKey.GetValue("", defaultValue: "")?.ToString() ?? "" },
KnownPrefixes = { prefix }
};
capability.Verbs.AddRange(GetVerbs(progIDKey, commandMapper));
capabilities.Entries.Add(capability);
}
else
{
existing.KnownPrefixes.Add(prefix);
}
}
}
