/// <summary>
/// Removes an AutoPlay handler registration from the current system.
/// </summary>
/// <param name="autoPlay">The AutoPlay handler information to be removed.</param>
/// <param name="machineWide">Remove the handler machine-wide instead of just for the current user.</param>
/// <param name="accessPoint">Indicates that the handler should was the default handler for all <see cref="Store.Model.Capabilities.AutoPlay.Events"/>.</param>
/// <exception cref="IOException">A problem occurs while writing to the filesystem or registry.</exception>
/// <exception cref="UnauthorizedAccessException">Write access to the filesystem or registry is not permitted.</exception>
/// <exception cref="InvalidDataException">The data in <paramref name="autoPlay"/> is invalid.</exception>
public static void Unregister([NotNull] Store.Model.Capabilities.AutoPlay autoPlay, bool machineWide, bool accessPoint = false)
{
#region Sanity checks
if (autoPlay == null)
{
throw new ArgumentNullException(nameof(autoPlay));
}
#endregion
if (string.IsNullOrEmpty(autoPlay.ID))
{
throw new InvalidDataException("Missing ID");
}
var hive = machineWide ? Registry.LocalMachine : Registry.CurrentUser;
if (accessPoint)
{
// TODO: Restore previous default
}
// Remove appropriate purpose flag and check if there are others
bool otherFlags;
using (var handlerKey = hive.OpenSubKey(RegKeyHandlers + @"\" + FileType.RegKeyPrefix + autoPlay.ID, writable: true))
{
if (handlerKey == null)
{
otherFlags = false;
}
else
{
handlerKey.DeleteValue(accessPoint ? FileType.PurposeFlagAccessPoint : FileType.PurposeFlagCapability, throwOnMissingValue: false);
otherFlags = handlerKey.GetValueNames().Any(name => name.StartsWith(FileType.PurposeFlagPrefix));
}
}
// Delete handler key and ProgID if there are no other references
if (!otherFlags)
{
foreach (var autoPlayEvent in autoPlay.Events.Except(x => string.IsNullOrEmpty(x.Name)))
{
using (var eventKey = hive.OpenSubKey(RegKeyAssocs + @"\" + autoPlayEvent.Name, writable: true))
{
eventKey?.DeleteValue(FileType.RegKeyPrefix + autoPlay.ID, throwOnMissingValue: false);
}
}
hive.DeleteSubKey(RegKeyHandlers + @"\" + FileType.RegKeyPrefix + autoPlay.ID, throwOnMissingSubKey: false);
try
{
hive.DeleteSubKeyTree(FileType.RegKeyClasses + @"\" + FileType.RegKeyPrefix + ".AutoPlay" + autoPlay.ID);
}
#region Error handling
catch (ArgumentException)
{
// Ignore missing registry keys
}
#endregion
}
}
/// <summary>
/// Adds an AutoPlay handler registration to the current system.
/// </summary>
/// <param name="target">The application being integrated.</param>
/// <param name="autoPlay">The AutoPlay handler information to be applied.</param>
/// <param name="machineWide">Register the handler machine-wide instead of just for the current user.</param>
/// <param name="handler">A callback object used when the the user is to be informed about the progress of long-running operations such as downloads.</param>
/// <param name="accessPoint">Indicates that the handler should become the default handler for all <see cref="Store.Model.Capabilities.AutoPlay.Events"/>.</param>
/// <exception cref="OperationCanceledException">The user canceled the task.</exception>
/// <exception cref="IOException">A problem occurs while writing to the filesystem or registry.</exception>
/// <exception cref="WebException">A problem occured while downloading additional data (such as icons).</exception>
/// <exception cref="UnauthorizedAccessException">Write access to the filesystem or registry is not permitted.</exception>
/// <exception cref="InvalidDataException">The data in <paramref name="autoPlay"/> is invalid.</exception>
public static void Register(FeedTarget target, [NotNull] Store.Model.Capabilities.AutoPlay autoPlay, bool machineWide, [NotNull] ITaskHandler handler, bool accessPoint = false)
{
#region Sanity checks
if (autoPlay == null)
{
throw new ArgumentNullException(nameof(autoPlay));
}
if (handler == null)
{
throw new ArgumentNullException(nameof(handler));
}
#endregion
if (string.IsNullOrEmpty(autoPlay.ID))
{
throw new InvalidDataException("Missing ID");
}
if (autoPlay.Verb == null)
{
throw new InvalidDataException("Missing verb");
}
if (string.IsNullOrEmpty(autoPlay.Verb.Name))
{
throw new InvalidDataException("Missing verb name");
}
if (string.IsNullOrEmpty(autoPlay.Provider))
{
throw new InvalidDataException("Missing provider");
}
var hive = machineWide ? Registry.LocalMachine : Registry.CurrentUser;
using (var commandKey = hive.CreateSubKeyChecked(FileType.RegKeyClasses + @"\" + FileType.RegKeyPrefix + ".AutoPlay" + autoPlay.ID + @"\shell\" + autoPlay.Verb.Name + @"\command"))
commandKey.SetValue("", FileType.GetLaunchCommandLine(target, autoPlay.Verb, machineWide, handler));
using (var handlerKey = hive.CreateSubKeyChecked(RegKeyHandlers + @"\" + FileType.RegKeyPrefix + autoPlay.ID))
{
// Add flag to remember whether created for capability or access point
handlerKey.SetValue(accessPoint ? FileType.PurposeFlagAccessPoint : FileType.PurposeFlagCapability, "");
handlerKey.SetValue(RegValueProgID, FileType.RegKeyPrefix + ".AutoPlay" + autoPlay.ID);
handlerKey.SetValue(RegValueVerb, autoPlay.Verb.Name);
handlerKey.SetValue(RegValueProvider, autoPlay.Provider);
handlerKey.SetValue(RegValueDescription, autoPlay.Descriptions.GetBestLanguage(CultureInfo.CurrentUICulture) ?? autoPlay.Verb.Name);
var icon = autoPlay.GetIcon(Icon.MimeTypeIco) ?? target.Feed.GetIcon(Icon.MimeTypeIco, autoPlay.Verb.Command);
if (icon != null)
{
handlerKey.SetValue(RegValueIcon, IconProvider.GetIconPath(icon, handler, machineWide) + ",0");
}
}
foreach (var autoPlayEvent in autoPlay.Events.Except(x => string.IsNullOrEmpty(x.Name)))
{
using (var eventKey = hive.CreateSubKeyChecked(RegKeyAssocs + @"\" + autoPlayEvent.Name))
eventKey.SetValue(FileType.RegKeyPrefix + autoPlay.ID, "");
if (accessPoint)
{
using (var chosenEventKey = hive.CreateSubKeyChecked(RegKeyChosenAssocs + @"\" + autoPlayEvent.Name))
chosenEventKey.SetValue("", FileType.RegKeyPrefix + autoPlay.ID);
}
}
}
