public static void UnResolveSubject(IInteractivitySubject interactivitySubject)
{
if (IsResolved(interactivitySubject) == false)
{
return;
}
if (IsSpecified(interactivitySubject) == false)
{
interactivitySubject.SubjectStore = null;
return;
}
interactivitySubject.SubjectKind &= SubjectKind.Unspecified;
switch (interactivitySubject.SubjectKind)
{
case SubjectKind.Explicit:
if (interactivitySubject.SubjectStore is BindingProxyBase bindingProxy)
{
interactivitySubject.SubjectStore = bindingProxy.Binding;
bindingProxy.Dispose();
}
break;
case SubjectKind.Name:
interactivitySubject.SubjectStore = GetSubjectName(interactivitySubject);
break;
}
}
private static DependencyObject UnwrapResolved(IInteractivitySubject interactivitySubject)
{
if (interactivitySubject.SubjectStore is BindingProxyBase bindingProxyBase)
{
return(bindingProxyBase.Value as DependencyObject);
}
return((DependencyObject)interactivitySubject.SubjectStore);
}
public static void SetSubjectName(IInteractivitySubject interactivitySubject, string value)
{
if (ReferenceEquals(interactivitySubject.SubjectStore, value))
{
return;
}
UnResolveSubject(interactivitySubject);
interactivitySubject.SubjectStore = value;
interactivitySubject.SubjectKind = SubjectKind.Name;
}
public static void SetExplicitSubject(IInteractivitySubject interactivitySubject, object value)
{
if (ReferenceEquals(interactivitySubject.SubjectStore, value))
{
return;
}
UnResolveSubject(interactivitySubject);
interactivitySubject.SubjectStore = value;
interactivitySubject.SubjectKind = SubjectKind.Explicit;
}
public static string GetSubjectName(IInteractivitySubject interactivitySubject)
{
var subjectKind = interactivitySubject.SubjectKind;
subjectKind &= SubjectKind.Unspecified;
if (subjectKind == SubjectKind.Unspecified || subjectKind != SubjectKind.Name)
{
return(null);
}
// Unwrap if resolved through Binding
return((interactivitySubject.SubjectStore as BindingProxyBase)?.Binding.ElementName ?? (string)interactivitySubject.SubjectStore);
}
public static object GetExplicitSubject(IInteractivitySubject interactivitySubject)
{
var subjectKind = interactivitySubject.SubjectKind;
subjectKind &= SubjectKind.Unspecified;
if (subjectKind == SubjectKind.Unspecified || subjectKind != SubjectKind.Explicit)
{
return(null);
}
// Unwrap if resolved through Binding
return((interactivitySubject.SubjectStore as BindingProxyBase)?.Binding ?? interactivitySubject.SubjectStore);
}
private static DependencyObject InstallBinding(IInteractivitySubject interactivitySubject, NativeBinding binding)
{
var interactivityTarget = interactivitySubject.GetInteractivityObject().InteractivityTarget;
if (interactivityTarget == null)
{
return(null);
}
var subjectBindingProxy = new SubjectBindingProxy(binding, interactivitySubject);
interactivitySubject.SubjectStore = subjectBindingProxy;
interactivitySubject.SubjectKind |= SubjectKind.Resolved;
return(subjectBindingProxy.Value as DependencyObject);
}
public static void CopyFrom(IInteractivitySubject target, IInteractivitySubject source)
{
var sourceSubjectKind = source.SubjectKind & SubjectKind.Unspecified;
if (sourceSubjectKind == 0)
{
sourceSubjectKind = SubjectKind.Unspecified;
}
switch (sourceSubjectKind)
{
case SubjectKind.Name:
SetSubjectName(target, GetSubjectName(source));
break;
case SubjectKind.Explicit:
SetExplicitSubject(target, GetExplicitSubject(source));
break;
}
}
public static DependencyObject ResolveSubject(IInteractivitySubject interactivitySubject)
{
if (IsResolved(interactivitySubject))
{
return(UnwrapResolved(interactivitySubject));
}
var interactivityObject = interactivitySubject.GetInteractivityObject();
if (interactivityObject.IsLoaded == false)
{
return(null);
}
var interactivityRoot = interactivityObject.Root;
// TODO Setters should apply values on Interactivity root only, however Triggers could interact with other controls on Page. Need to check setters behavior in future.
if (interactivityRoot is StyleRoot && interactivityObject is SetterBase)
{
return(interactivityRoot.InteractivityTarget);
}
var subjectKind = interactivitySubject.SubjectKind;
subjectKind &= SubjectKind.Unspecified;
var interactivityTarget = interactivityObject.InteractivityTarget;
var subject = interactivitySubject.SubjectStore;
// Explicit
if (subjectKind == SubjectKind.Explicit)
{
var binding = subject as NativeBinding;
if (subject is BindingBaseExtension bindingBase)
{
binding = bindingBase.GetBinding(interactivityTarget, null);
}
if (binding != null)
{
return(InstallBinding(interactivitySubject, binding));
}
interactivitySubject.SubjectKind |= SubjectKind.Resolved;
return(subject as DependencyObject);
}
// Name
if (subjectKind == SubjectKind.Name)
{
return(InstallBinding(interactivitySubject, new NativeBinding {
ElementName = (string)subject, BindsDirectlyToSource = true
}));
}
// InteractivityTarget
if (interactivityTarget == null)
{
return(null);
}
interactivitySubject.SubjectStore = interactivityTarget;
interactivitySubject.SubjectKind = SubjectKind.Resolved;
return(interactivityTarget);
}
public static bool IsSpecified(IInteractivitySubject interactivitySubject)
{
return((interactivitySubject.SubjectKind & SubjectKind.Unspecified) != SubjectKind.Unspecified);
}
public static bool IsResolved(IInteractivitySubject interactivitySubject)
{
return((interactivitySubject.SubjectKind & SubjectKind.Resolved) != 0);
}
public static InteractivityObject GetInteractivityObject(this IInteractivitySubject interactivitySubject)
{
return((InteractivityObject)interactivitySubject);
}
public SubjectBindingProxy(NativeBinding binding, IInteractivitySubject interactivitySubject) : base(binding, interactivitySubject.GetInteractivityObject().InteractivityTarget)
{
_interactivityObject = interactivitySubject;
}
