/// <inheritdoc />
public ICardContextLayer RequestLayer(ICardContextLayer layer, SearchMode mode)
{
if (layers.Count == 0)
{
throw new Exception("CardContextStack.requestLayer(): no layers defined in the stack");
}
switch (mode)
{
case SearchMode.Bottom:
return(layers[layers.Count - 1]);
case SearchMode.Next:
return(layers.Following(l => l.LayerId == layer.LayerId));
case SearchMode.Previous:
return(layers.Preceding(l => l.LayerId == layer.LayerId));
case SearchMode.Top:
return(layers[0]);
default:
throw new NotSupportedException(String.Format("CardContextStack.requestLayer(): Seek mode '{0}' unknown", mode));
}
}
/// <summary>
/// Encapsulates an <see cref="ICardContextLayer"/> and add <see cref="ICardContextLayerObservable"/> behaviour.
/// </summary>
/// <param name="layer">Card context to encapsulate.</param>
/// <returns></returns>
public static ICardContextLayerObservable ToObservableLayer(this ICardContextLayer layer)
{
var layerObservable = layer as ICardContextLayerObservable;
return(layerObservable ?? new CardContextLayerObservable(layer));
}
/// <inheritdoc />
public ICardContextLayer RequestLayer(ICardContextLayer layer, SearchMode mode)
{
var stack = (ICardContextStack)context;
return(stack.RequestLayer(layer, mode));
}
/// <inheritdoc />
public void ReleaseLayer(ICardContextLayer layer)
{
var stack = (ICardContextStack)context;
stack.ReleaseLayer(layer);
}
/// <inheritdoc />
public void AddLayer(ICardContextLayer layer)
{
var stack = (ICardContextStack)context;
stack.AddLayer(layer);
}
/// <inheritdoc />
public void ReleaseLayer(ICardContextLayer layer)
{
layers.Remove(layer);
}
/// <inheritdoc />
public void AddLayer(ICardContextLayer layer)
{
layers.Add(layer);
layer.SetStack(this);
}
/// <summary>
/// Initializes a new instance.
/// </summary>
/// <param name="contextLayer"><b>ICardContext</b> instance to wrap.</param>
public CardContextLayerObservable(ICardContextLayer contextLayer)
: base(contextLayer)
{
}
