/// <summary>
///
/// Updates <see cref="_desktopConfigurations"/> with <see cref="IVirtualDesktopConfiguration"/>s
/// corresponding to <see cref="IVirtualDesktop"/>s within <paramref name="after"/>.
///
/// <see cref="IVirtualDesktop"/>s with no matched <see cref="IVirtualDesktopConfiguration"/> will be bound
/// to one created by <see cref="IConfigurationFactory.ConfigurationFor(IVirtualDesktop)"/>.
///
/// <see cref="IVirtualDesktopConfiguration"/>s with no matched <see cref="IVirtualDesktop"/> will be bound
/// to <see langword="null"/> (i.e. unbound).
///
/// </summary>
/// <param name="before"></param>
/// <param name="after"></param>
private void UpdateDesktopConfigurations(IEnumerable <IVirtualDesktop> before, IEnumerable <IVirtualDesktop> after)
{
var pairs = _desktopConfigurations
.DefaultIfEmpty()
.Join(
after.DefaultIfEmpty(),
configuration => configuration.Guid, desktop => desktop.Guid,
(configuration, desktop) =>
new
{
Desktop = desktop,
Configuration =
configuration
// when desktop does not have matching configuration, one is created.
?? _configurationFactory.ConfigurationFor(desktop)
})
.ToArray();
foreach (var pair in pairs)
{
// should NOT overwrite configuration values
// when pair.Desktop is null (did not match an enabled desktop)
// the configuration becomes unbound.
pair.Configuration.BindToTarget(pair.Desktop, _configurationFactory);
}
DesktopConfigurations = pairs.Select(pair => pair.Configuration);
}
private static void MapConfigurationToVirtualDesktop(
IEnumerable <IVirtualDesktop> desktops,
IList <IVirtualDesktopConfiguration> configurations,
IConfigurationFactory configurationFactory)
{
foreach (var desktop in desktops)
{
var matchingConfiguration = configurations.FirstOrDefault(
configuration =>
configuration.IsConfigurationFor(desktop));
if (matchingConfiguration != null)
{
// should NOT overwrite configuration values
matchingConfiguration.BindToTarget(desktop, configurationFactory);
}
else
{
configurations.Add(configurationFactory.ConfigurationFor(desktop));
}
}
}