void IShellDescriptorManagerEventHandler.Changed(ShellDescriptor descriptor, string tenant)
{
// deduce and apply state changes involved
var shellState = _stateManager.GetShellState();
foreach (var feature in descriptor.Features) {
var featureName = feature.Name;
var featureState = shellState.Features.SingleOrDefault(f => f.Name == featureName);
if (featureState == null) {
featureState = new ShellFeatureState {
Name = featureName
};
shellState.Features = shellState.Features.Concat(new[] { featureState });
}
if (!featureState.IsInstalled) {
_stateManager.UpdateInstalledState(featureState, ShellFeatureState.State.Rising);
}
if (!featureState.IsEnabled) {
_stateManager.UpdateEnabledState(featureState, ShellFeatureState.State.Rising);
}
}
foreach (var featureState in shellState.Features) {
var featureName = featureState.Name;
if (descriptor.Features.Any(f => f.Name == featureName)) {
continue;
}
if (!featureState.IsDisabled) {
_stateManager.UpdateEnabledState(featureState, ShellFeatureState.State.Falling);
}
}
FireApplyChangesIfNeeded();
}
public void UpdateInstalledState(ShellFeatureState featureState, ShellFeatureState.State value)
{
Logger.Debug("Feature {0} InstallState changed from {1} to {2}",
featureState.Name, featureState.InstallState, value);
var featureStateRecord = FeatureRecord(featureState.Name);
if (featureStateRecord.InstallState != featureState.InstallState) {
Logger.Warning("Feature {0} prior InstallState was {1} when {2} was expected",
featureState.Name, featureStateRecord.InstallState, featureState.InstallState);
}
featureStateRecord.InstallState = value;
featureState.InstallState = value;
}
static bool IsRising(ShellFeatureState state)
{
return state.InstallState == ShellFeatureState.State.Rising ||
state.EnableState == ShellFeatureState.State.Rising;
}
private static bool FeatureShouldBeLoadedForStateChangeNotifications(ShellFeatureState shellFeatureState)
{
return FeatureIsChanging(shellFeatureState) || shellFeatureState.EnableState == ShellFeatureState.State.Up;
}
private static bool FeatureIsChanging(ShellFeatureState shellFeatureState)
{
if (shellFeatureState.EnableState == ShellFeatureState.State.Rising ||
shellFeatureState.EnableState == ShellFeatureState.State.Falling) {
return true;
}
if (shellFeatureState.InstallState == ShellFeatureState.State.Rising ||
shellFeatureState.InstallState == ShellFeatureState.State.Falling) {
return true;
}
return false;
}