public bool Handle(KeyEventArgs args, ILister lister)
{
var key = args.Key == Key.System ? args.SystemKey : args.Key;
var modifierKeys = args.KeyboardDevice.Modifiers;
KexBinding binding = null;
var groupName = lister?.GetType().Name;
var listerCommands = _bindings.Where(b => b.Group == groupName || string.IsNullOrEmpty(b.Group));
if (key.IsModifier())
{
return(true);
}
if (_firstKey != null)
{
binding = GetDoubleBinding(listerCommands, key, modifierKeys, out binding);
if (binding == null)
{
args.Handled = true;
return(true);
}
}
else
{
if (_workspace.CommanderMode)
{
binding = _bindings.FirstOrDefault(b => b.Group == CommanderGroup && b.Key == key && b.Modifier == modifierKeys);
}
if (binding == null)
{
binding = listerCommands.FirstOrDefault(b =>
(b.Key == key && b.Modifier == modifierKeys && !(b is KexDoubleBinding)) ||
(b.Key == key && b.Modifier == modifierKeys));
}
if (binding is KexDoubleBinding)
{
_firstKey = key;
_firstModifier = modifierKeys;
_workspace.NotificationHost.AddInfo("Press second key to perform action");
args.Handled = true;
return(true);
}
}
if (binding != null)
{
if (binding.Command == null)
{
binding.Command = _workspace.CommandRepository.GetCommandByName(binding.CommandName);
}
try
{
switch (binding.CommandName)
{
//Simulated Cursor Down/up brings better Focus/Scrolling/Grouping Handling
case nameof(MoveCursorDownCommand):
{
args.Handled = true;
var newArgs = new KeyEventArgs(Keyboard.PrimaryDevice, Keyboard.PrimaryDevice.ActiveSource ?? throw new InvalidOperationException(), 0, Key.Down)
{
RoutedEvent = Keyboard.KeyDownEvent
};
InputManager.Current.ProcessInput(newArgs);
EnsureFocus();
return(true);
}
case nameof(MoveCursorUpCommand):
{
args.Handled = true;
var newArgs = new KeyEventArgs(Keyboard.PrimaryDevice, Keyboard.PrimaryDevice.ActiveSource ?? throw new InvalidOperationException(), 0, Key.Up)
{
RoutedEvent = Keyboard.KeyDownEvent
};
InputManager.Current.ProcessInput(newArgs);
EnsureFocus();
return(true);
}
}
var commandArgs = new CommandArgument(lister, binding.CommandArguments);
_workspace.CommandRepository.Execute(binding.Command, commandArgs);
args.Handled = true;
return(true);
}
catch (Exception ex)
{
_workspace.NotificationHost.AddError(ex.Message, ex);
}
}
args.Handled = false;
return(false);
}
private KexBinding GetDoubleBinding(IEnumerable <KexBinding> listerCommands, Key key, ModifierKeys modifierKeys, out KexBinding binding)
{
_workspace.NotificationHost.ClearCurrentMessage();
binding = listerCommands.OfType <KexDoubleBinding>().FirstOrDefault(b =>
b.Key == _firstKey && b.Modifier == _firstModifier &&
b.SecondKey == key && b.SecondModifier == modifierKeys
);
if (binding == null)
{
_workspace.NotificationHost.AddInfo($"Binding {_firstKey}-{key} not found");
}
_firstKey = null;
_firstModifier = null;
return(binding);
}