public static InteractionBuffer IsValid(IFacetHolder facetHolder, InteractionContext ic, InteractionBuffer buf) {
IFacet[] facets = facetHolder.GetFacets(FacetFilters.IsA(typeof (IValidatingInteractionAdvisor)));
foreach (IValidatingInteractionAdvisor advisor in facets) {
buf.Append(advisor.Invalidates(ic));
}
return buf;
}
private static InteractionBuffer IsUsable(IFacetHolder facetHolder, InteractionContext ic, InteractionBuffer buf) {
IFacet[] facets = facetHolder.GetFacets(FacetFilters.IsA(typeof (IDisablingInteractionAdvisor)));
foreach (IDisablingInteractionAdvisor advisor in facets) {
buf.Append(advisor.Disables(ic));
}
return buf;
}
public static bool IsVisible(IFacetHolder facetHolder, InteractionContext ic) {
var buf = new InteractionBuffer();
IFacet[] facets = facetHolder.GetFacets(FacetFilters.IsA(typeof (IHidingInteractionAdvisor)));
foreach (IHidingInteractionAdvisor advisor in facets) {
buf.Append(advisor.Hides(ic));
}
return IsVisible(buf);
}
public static bool IsVisibleWhenPersistent(IFacetHolder facetHolder, InteractionContext ic) {
var buf = new InteractionBuffer();
IFacet[] facets = facetHolder.GetFacets(FacetFilters.IsA(typeof (IHidingInteractionAdvisor)));
foreach (IHidingInteractionAdvisor advisor in facets) {
if (advisor is IHiddenFacet) {
if (((IHiddenFacet) advisor).Value == When.OncePersisted) {
continue;
}
}
buf.Append(advisor.Hides(ic));
}
return IsVisible(buf);
}