void InvokeChangeActionInStack(StackChangeEvent <T> stackChangeEvent, GroupRequest groupReq, int index = 0)
{
if (index >= m_StatesStack.Count)
{
groupReq.SetDone();
return;
}
var state = m_StatesStack[index];
index++;
var request = new Request();
request.Done += () => InvokeChangeActionInStack(stackChangeEvent, groupReq, index);
groupReq.AddRequest(request);
m_EnumToState[state].ChangeState(stackChangeEvent, request);
}
public void Set(T applicationState, [NotNull] Action onComplete)
{
Assert.IsFalse(IsBusy);
Assert.IsNotNull(onComplete);
if (m_StatesStack.Count == 1 && m_StatesStack[0].Equals(applicationState))
{
onComplete.Invoke();
return;
}
IsBusy = true;
m_OldStackState = ListPool <T> .Get();
m_OldStackState.AddRange(m_StatesStack);
m_NewStackState = ListPool <T> .Get();
m_NewStackState.Add(applicationState);
var removedEvent = StackChangeEvent <T> .GetPooled(StackAction.Removed, m_OldStackState, m_NewStackState);
var addEvent = StackChangeEvent <T> .GetPooled(StackAction.Added, m_OldStackState, m_NewStackState);
var groupReq = new GroupRequest(2);
groupReq.Done += onComplete.Invoke;
var removeReq = new GroupRequest(m_OldStackState.Count);
var addReq = new GroupRequest(m_NewStackState.Count);
removeReq.ProgressChange += _ => InvokeProgressChange(groupReq.Progress, removedEvent);
removeReq.Done += () =>
{
InvokeStateChanged(removedEvent);
StackChangeEvent <T> .Release(removedEvent);
InvokeStateWillChange(addEvent);
InvokeChangeActionInStack(addEvent, addReq);
};
addReq.ProgressChange += _ => InvokeProgressChange(groupReq.Progress, addEvent);
addReq.Done += () =>
{
ListPool <T> .Release(m_OldStackState);
ListPool <T> .Release(m_NewStackState);
m_StatesStack.Clear();
m_StatesStack.Add(applicationState);
InvokeStateChanged(addEvent);
StackChangeEvent <T> .Release(addEvent);
IsBusy = false;
};
groupReq.AddRequest(removeReq);
groupReq.AddRequest(addReq);
InvokeStateWillChange(removedEvent);
InvokeChangeActionInStack(removedEvent, removeReq);
}
public void Pop([NotNull] Action <T> onComplete)
{
Assert.IsFalse(IsBusy);
Assert.IsNotNull(onComplete);
if (m_StatesStack.Count == 0)
{
throw new Exception("States are empty");
}
IsBusy = true;
m_OldStackState = ListPool <T> .Get();
m_OldStackState.AddRange(m_StatesStack);
var applicationState = m_StatesStack.Last();
m_NewStackState = ListPool <T> .Get();
m_NewStackState.AddRange(m_StatesStack);
m_NewStackState.Remove(applicationState);
var removedEvent = StackChangeEvent <T> .GetPooled(StackAction.Removed, m_OldStackState, m_NewStackState);
var resumedEvent = StackChangeEvent <T> .GetPooled(StackAction.Resumed, m_OldStackState, m_NewStackState);
var group = new GroupRequest(2);
group.Done += () => onComplete.Invoke(applicationState);
var removeReq = new Request();
var resumeReq = new Request();
removeReq.ProgressChange += _ => InvokeProgressChange(group.Progress, removedEvent);
removeReq.Done += () =>
{
m_StatesStack.Remove(applicationState);
InvokeStateChanged(removedEvent);
StackChangeEvent <T> .Release(removedEvent);
InvokeStateWillChange(resumedEvent);
if (m_StatesStack.Count > 0)
{
m_EnumToState[m_StatesStack.Last()].ChangeState(resumedEvent, resumeReq);
}
else
{
resumeReq.SetDone();
}
};
resumeReq.ProgressChange += _ => InvokeProgressChange(group.Progress, resumedEvent);
resumeReq.Done += () =>
{
ListPool <T> .Release(m_OldStackState);
ListPool <T> .Release(m_NewStackState);
InvokeStateChanged(resumedEvent);
IsBusy = false;
};
group.AddRequest(removeReq);
group.AddRequest(resumeReq);
InvokeStateWillChange(removedEvent);
m_EnumToState[applicationState].ChangeState(removedEvent, removeReq);
}