internal void MarkDoneIfYield()
{
if (ProcessState == KeyProcessState.Yield)
{
ProcessState = KeyProcessState.Done;
Console.WriteLine($"${Name}@Yield->@Done");
}
}
internal KeyProcessState Climb(KeyEvent eventType, IKeyEventArgs iargs,
TrieNode <ICombination, KeyEventCommand> candidateNode, bool downInChord)
{
var args = iargs as KeyEventArgsExt;
Debug.Assert(args != null, nameof(args) + " != null");
if (args.NoFurtherProcess)
{
return(ProcessState = KeyProcessState.NoFurtherProcess);
}
// no match
// Chord_downOrUp? or
if (candidateNode == null)
{
if (eventType == KeyEvent.Down)
{
if (_treeWalker.IsOnRoot)
{
// AnyKeyNotInRoot_down_or_up: *A_down *A_up is not registered in root
_lastKeyDownNodeForAllUp = null;
return(ProcessState = KeyProcessState.Yield);
}
// KeyInChord_down:C+D, A+B A_down
if (downInChord)
{
return(ProcessState = KeyProcessState.Continue); // waiting for trigger key
}
Reset();
return(ProcessState = KeyProcessState.Reprocess); // to process combination chord up
}
// allUp design goal:
// 1. could register allUp event
// 2. navigate when A+B+C_up event not triggered because of chord_up before trigger_up
if (_lastKeyDownNodeForAllUp != null &&
_lastKeyDownNodeForAllUp.Key.IsAnyKey(args.KeyCode))
{
if (args.KeyboardState.AreAllUp(_lastKeyDownNodeForAllUp.Key.AllKeys))
{
candidateNode = _lastKeyDownNodeForAllUp;
eventType = KeyEvent.AllUp;
}
else
{
return(ProcessState = KeyProcessState.Continue);
}
}
else
{
if (_treeWalker.IsOnRoot)
{
// AnyKeyNotInRoot_down_or_up: *A_down *A_up is not registered in root
_lastKeyDownNodeForAllUp = null;
return(ProcessState = KeyProcessState.Yield);
}
// on path, up
if (_treeWalker.ChildrenCount == 0)
{
// NoChild & NotOnRoot:
// KeyInChord_up : A+B when A_up.
// other keyup: A+B and B mapto C??
Reset();
return(ProcessState = KeyProcessState.Reprocess); // Chord_up would be processed on root
}
// HaveChild & KeyInChord_up: A+B, C when A_up continue wait C
if (_treeWalker.CurrentNode.Key.Chord.Contains(args.KeyCode))
{
Console.WriteLine(
" would never been here:treeWalker.CurrentNode.Key.Chord.Contains(args.KeyCode)");
Debugger.Break();
return(ProcessState = KeyProcessState.Continue);
}
//HaveChild & KeyNotInChord_up: B+D, F when C_up.
Reset();
return(ProcessState = KeyProcessState.Reprocess);
}
}
args.KeyEvent = eventType;
var lastDownHit = "";
if (_lastKeyDownNodeForAllUp != null)
{
lastDownHit = $"\t↓@{_lastKeyDownNodeForAllUp}";
}
Console.WriteLine($"${Name}{lastDownHit}");
// matched
var actionList = candidateNode.Values() as KeyActionList <KeyEventCommand>;
Debug.Assert(actionList != null, nameof(actionList) + " != null");
// execute
#if !DEBUG
try
{
#endif
var oneExecuted = false;
foreach (var keyCommand in actionList[eventType])
{
if (keyCommand.CanExecute != null && !keyCommand.CanExecute(args))
{
Console.WriteLine($"\t/!{eventType}\t{keyCommand.Id}\t{keyCommand.Description}");
continue;
}
oneExecuted = true;
var exe = keyCommand.Execute;
var isAsync = exe?.Method.GetCustomAttribute(typeof(AsyncStateMachineAttribute)) != null;
Console.WriteLine(
$"\t!{eventType}{(isAsync ? "_async" : "")}\t{keyCommand.Id}\t{keyCommand.Description}");
exe?.Invoke(args);
}
if (!oneExecuted && actionList[eventType].Any())
{
Console.WriteLine($"All event of type:{eventType} not executable!");
if (eventType == KeyEvent.Up &&
_lastKeyDownNodeForAllUp != null &&
_lastKeyDownNodeForAllUp.Key.Chord.Contains(args.KeyCode))
{
return(ProcessState = KeyProcessState.Continue);
}
Reset();
return(ProcessState = KeyProcessState.Yield); // all not executable, state of the eventType disabled
}
#if !DEBUG
}
catch (Exception e)
{
MessageBox.Show(e.ToString());
}
#endif
if (args.PathToGo != null && !args.PathToGo.SequenceEqual(candidateNode.KeyPath)) // goto state by requiring
{
if (!_treeWalker.TryGoToState(args.PathToGo, out var state))
{
Console.WriteLine($"Couldn't go to state {state}");
}
_lastKeyDownNodeForAllUp = null;
return(ProcessState = KeyProcessState.Continue);
}
switch (eventType)
{
case KeyEvent.Up:
{
// only navigate on up/AllUp event
_treeWalker.GoToChild(candidateNode);
if (candidateNode.ChildrenCount == 0)
{
if (actionList[KeyEvent.AllUp].Any())
{
// wait for chord up
return(ProcessState = KeyProcessState.Continue);
}
Notify?.CloseKeysTip(Name);
Reset();
return(ProcessState = KeyProcessState.Done);
}
Notify?.ShowKeysTip(Name, _treeWalker.CurrentNode.Tip);
return(ProcessState = KeyProcessState.Continue);
}
case KeyEvent.AllUp:
_lastKeyDownNodeForAllUp = null;
// navigate on AllUp event only when not navigated by up
// A+B then B_up then A_up would not execute if clause
if (_treeWalker.CurrentNode.Equals(candidateNode))
{
return(ProcessState);
}
_treeWalker.GoToChild(candidateNode);
if (candidateNode.ChildrenCount == 0)
{
Reset();
Notify?.CloseKeysTip(Name);
return(ProcessState = KeyProcessState.Done);
}
else
{
Notify?.ShowKeysTip(Name, _treeWalker.CurrentNode.Tip);
return(ProcessState = KeyProcessState.Continue);
}
case KeyEvent.Down:
_lastKeyDownNodeForAllUp = candidateNode;
return(ProcessState = KeyProcessState.Continue);
default:
throw new Exception($"KeyEvent: {eventType} not supported");
}
}