private void InterceptorConditionChanged(object sender, TypeEventArgs e)
{
var indexOfChangedType = this.interceptedViewTypes.IndexOf(e.Type);
if (indexOfChangedType >= 0)
{
var frame = this.GetFrame();
var vmType = this.viewModelLocator.GetAssociatedViewModelType(e.Type);
var intercepted = this.InterceptNavigationForward(e.Type, vmType);
if (intercepted)
{
// the navigation should now be intercepted, if the navigation did occur, remove it from stack / go back if it is last page
var inStack = frame.BackStack.FirstOrDefault(p => p.SourcePageType == e.Type);
if (inStack != null)
{
frame.BackStack.Remove(inStack);
}
else if (frame.CurrentSourcePageType == e.Type)
{
frame.GoBack();
}
}
else if (this.BackStackPageTypes.FirstOrDefault(t => t == e.Type) == null)
{
// the navigation should not be intercepted, if navigation didn't occur, insert it into backstack / navigate to it if it's last page
var backTypes = this.BackStackPageTypes.ToList();
for (int i = 0; i < backTypes.Count; i++)
{
if (indexOfChangedType < this.interceptedViewTypes.IndexOf(backTypes[i]))
{
frame.BackStack.Insert(i, new PageStackEntry(e.Type, null, null));
return;
}
}
frame.Navigate(e.Type);
}
}
}
private void AttributeConditionChanged(object sender, TypeEventArgs e)
{
this.ConditionChanged?.Invoke(sender, e);
}
private void AttributeConditionChanged(object sender, TypeEventArgs e)
{
this.ConditionChanged?.Invoke(sender, e);
}
private void InterceptorConditionChanged(object sender, TypeEventArgs e)
{
var indexOfChangedType = this.interceptedViewTypes.IndexOf(e.Type);
if (indexOfChangedType >= 0)
{
var frame = this.GetFrame();
var vmType = this.viewModelLocator.GetAssociatedViewModelType(e.Type);
var intercepted = this.InterceptNavigationForward(e.Type, vmType);
if (intercepted)
{
// the navigation should now be intercepted, if the navigation did occur, remove it from stack / go back if it is last page
var inStack = frame.BackStack.FirstOrDefault(p => p.SourcePageType == e.Type);
if (inStack != null)
{
frame.BackStack.Remove(inStack);
}
else if (frame.CurrentSourcePageType == e.Type)
{
frame.GoBack();
}
}
else if (this.BackStackPageTypes.FirstOrDefault(t => t == e.Type) == null)
{
// the navigation should not be intercepted, if navigation didn't occur, insert it into backstack / navigate to it if it's last page
var backTypes = this.BackStackPageTypes.ToList();
for (int i = 0; i < backTypes.Count; i++)
{
if (indexOfChangedType < this.interceptedViewTypes.IndexOf(backTypes[i]))
{
frame.BackStack.Insert(i, new PageStackEntry(e.Type, null, null));
return;
}
}
frame.Navigate(e.Type);
}
}
}
