public virtual void KeyDown(VimKeyEventArgs args)
{
bool handled = true;
if (_keyInputEvaluation == null) {
_keyInputEvaluation = new VimKeyInputEvaluation(this.Host);
}
IVimAction action = null;
string status_char = "";
VimKeyInputEvaluation.KeyEvalState eval_state = _keyInputEvaluation.Evaluate(args.KeyInput, out action, out status_char);
if (eval_state == VimKeyInputEvaluation.KeyEvalState.InProcess) {
Debug.Assert(status_char != null);
if (status_char == VimKeyInputEvaluation.Status_Char_Backspace) {
if (_statusText.Length > 0) {
_statusText = _statusText.Substring(0, _statusText.Length - 1);
}
else {
Debug.Assert(false);
}
}
else {
_statusText += status_char;
}
this.Host.UpdateStatus(_statusText);
}
else if (eval_state == VimKeyInputEvaluation.KeyEvalState.Success) {
if (action != null) {
// TODO live with some actions unimplemented
if (action is IVimMotion) {
(action as IVimMotion).Move(this.Host);
}
else if (action is IVimEdititon) {
this.DoEdition(action as IVimEdititon);
}
else {
Debug.Assert(false);
}
}
this.ResetKeyValuationStatus();
}
else if (eval_state == VimKeyInputEvaluation.KeyEvalState.Escape) {
this.ResetKeyValuationStatus();
}
else if (eval_state == VimKeyInputEvaluation.KeyEvalState.Error) {
if (this.IsSpecialKeyInput(args.KeyInput.Value)) {
handled = false;
}
this.ResetKeyValuationStatus();
}
else {
Debug.Assert(false);
this.ResetKeyValuationStatus();
}
args.Handled = handled;
}
private void ResetKeyValuationStatus()
{
_keyInputEvaluation = null;
_statusText = "";
this.Host.UpdateStatus(_statusText);
}
