protected override MvxBasePresentationAttribute GetAttributeForViewModel(Type viewModelType)
{
IList <MvxBasePresentationAttribute> attributes;
if (ViewModelToPresentationAttributeMap.TryGetValue(viewModelType, out attributes))
{
MvxBasePresentationAttribute attribute = null;
if (attributes.Count > 1)
{
var fragmentAttributes = attributes.OfType <MvxFragmentPresentationAttribute>();
// check if fragment can be displayed as child fragment first
foreach (var item in fragmentAttributes.Where(att => att.FragmentHostViewType != null))
{
var fragment = GetFragmentByViewType(item.FragmentHostViewType);
// if the fragment exists, and is on top, then use the current attribute
if (fragment != null && fragment.IsVisible && fragment.View.FindViewById(item.FragmentContentId) != null)
{
attribute = item;
break;
}
}
// if attribute is still null, check if fragment can be displayed in current activity
if (attribute == null)
{
var currentActivityHostViewModelType = GetCurrentActivityViewModelType();
foreach (var item in fragmentAttributes.Where(att => att.ActivityHostViewModelType != null))
{
if (CurrentActivity.FindViewById(item.FragmentContentId) != null && item.ActivityHostViewModelType == currentActivityHostViewModelType)
{
attribute = item;
break;
}
}
}
}
if (attribute == null)
{
attribute = attributes.FirstOrDefault();
}
return(GetOverridePresentationAttribute(attribute.ViewType) ?? attribute);
}
return(CreateAttributeForViewModel(viewModelType));
}
protected override MvxBasePresentationAttribute GetAttributeForViewModel(Type viewModelType)
{
IList <MvxBasePresentationAttribute> attributes;
if (ViewModelToPresentationAttributeMap.TryGetValue(viewModelType, out attributes))
{
MvxBasePresentationAttribute attribute = null;
if (attributes.Count > 1)
{
var fragmentAttributes = attributes.OfType <MvxFragmentPresentationAttribute>();
// check if fragment can be displayed as child fragment first
foreach (var item in fragmentAttributes.Where(att => att.FragmentHostViewType != null))
{
var fragment = GetFragmentByViewType(item.FragmentHostViewType);
// if the fragment exists, and is on top, then use the current attribute
if (fragment != null && fragment.IsVisible && fragment.View.FindViewById(item.FragmentContentId) != null)
{
attribute = item;
break;
}
}
// if attribute is still null, check if fragment can be displayed in current activity
if (attribute == null)
{
var currentActivityHostViewModelType = GetCurrentActivityViewModelType();
foreach (var item in fragmentAttributes.Where(att => att.ActivityHostViewModelType != null))
{
if (CurrentActivity.FindViewById(item.FragmentContentId) != null && item.ActivityHostViewModelType == currentActivityHostViewModelType)
{
attribute = item;
break;
}
}
}
}
if (attribute == null)
{
attribute = attributes.FirstOrDefault();
}
if (attribute.ViewType?.GetInterfaces().OfType <IMvxOverridePresentationAttribute>().FirstOrDefault() is IMvxOverridePresentationAttribute view)
{
var presentationAttribute = view.PresentationAttribute();
if (presentationAttribute != null)
{
return(presentationAttribute);
}
}
return(attribute);
}
var viewType = ViewsContainer.GetViewType(viewModelType);
if (viewType.IsSubclassOf(typeof(DialogFragment)))
{
MvxTrace.Trace($"PresentationAttribute not found for {viewModelType.Name}. " +
$"Assuming DialogFragment presentation");
return(new MvxDialogFragmentPresentationAttribute());
}
if (viewType.IsSubclassOf(typeof(Fragment)))
{
MvxTrace.Trace($"PresentationAttribute not found for {viewModelType.Name}. " +
$"Assuming Fragment presentation");
return(new MvxFragmentPresentationAttribute(GetCurrentActivityViewModelType(), Android.Resource.Id.Content));
}
MvxTrace.Trace($"PresentationAttribute not found for {viewModelType.Name}. " +
$"Assuming Activity presentation");
return(new MvxActivityPresentationAttribute()
{
ViewModelType = viewModelType
});
}
