/// <summary>
/// Will create new instance of <see cref="IDynamicCommandBuilder"/>.
/// </summary>
/// <param name="name">Command name</param>
/// <param name="strategy"><see cref="IDynamicCommandStrategy"/></param>
/// <returns><see cref="IDynamicCommandBuilder"/></returns>
protected IDynamicCommandBuilder CreateBuilder(string name, IDynamicCommandStrategy strategy, IViewModel viewModel)
{
IDynamicCommandBuilder builder = new DynamicCommandBuilder(name, strategy, viewModel);
if (_defaultConfigure != null)
{
builder = _defaultConfigure(builder);
}
return(builder);
}
/// <summary>
/// Creates a new instance of <see cref="DynamicCommandBuilder"/>.
/// </summary>
/// <param name="name">The name of the command.</param>
/// <param name="baseStrategy">The base strategy to use for the command.</param>
/// <param name="viewModel">The <see cref="IViewModel"/> that will own the newly created <see cref="IDynamicCommand"/>.</param>
public DynamicCommandBuilder(string name, IDynamicCommandStrategy baseStrategy, IViewModel viewModel = null)
{
if (string.IsNullOrEmpty(name))
{
throw new ArgumentException($"'{nameof(name)}' cannot be null or empty", nameof(name));
}
Name = name;
ViewModel = viewModel;
BaseStrategy = baseStrategy ?? throw new ArgumentNullException(nameof(baseStrategy));
}
/// <summary>
/// Initializes a new instance of the <see cref="DynamicCommand"/> class.
/// </summary>
/// <param name="name">Command name</param>
/// <param name="strategy"><see cref="IDynamicCommandStrategy"/></param>
public DynamicCommand(string name, IDynamicCommandStrategy strategy)
{
Name = name;
_strategy = strategy ?? throw new ArgumentNullException(nameof(strategy));
_strategy.CanExecuteChanged += OnCanExecuteChanged;
if (_diagnostics.IsEnabled("Created"))
{
_diagnostics.Write("Created", Name);
}
}
private static IDynamicCommandStrategy GetStrategy(IDynamicCommandStrategy baseStrategy, IList <DecoratorCommandStrategy> delegatingStrategies)
{
var strategy = baseStrategy;
// We use 'Reverse' so that the first items in the builder wrap the ones added later on.
foreach (var delegatingStrategy in delegatingStrategies.Reverse())
{
// Stitch up all the delegating strategies together.
delegatingStrategy.InnerStrategy = strategy;
strategy = delegatingStrategy;
}
return(strategy);
}
