public string Edit(string prompt, string initial)
{
_editThread = Thread.CurrentThread;
_searching = 0;
C.CancelKeyPress += InterruptEdit;
_done = false;
_history.CursorToEnd();
_maxRendered = 0;
Prompt = prompt;
_shownPrompt = prompt;
InitText(initial);
_history.Append(initial);
do
{
try
{
EditLoop();
}
catch (ThreadAbortException)
{
_searching = 0;
Thread.ResetAbort();
SimpleConsole.Wl();
SetPrompt(prompt);
SetText("");
}
} while (!_done);
SimpleConsole.Wl();
C.CancelKeyPress -= InterruptEdit;
if (_text == null)
{
_history.Close();
return(null);
}
var result = _text.ToString();
if (result != "")
{
_history.Accept(result);
}
else
{
_history.RemoveLast();
}
return(result);
}
private void CmdDeleteChar()
{
// If there is no input, this behaves like EOF
if (_text.Length == 0)
{
_done = true;
_text = null;
SimpleConsole.Wl();
return;
}
if (_cursor == _text.Length)
{
return;
}
_text.Remove(_cursor, 1);
ComputeRendered();
RenderAfter(_cursor);
}
private void Render()
{
SimpleConsole.W(_shownPrompt);
SimpleConsole.W(_renderedText.ToString());
var max = Math.Max(_renderedText.Length + _shownPrompt.Length, _maxRendered);
for (var i = _renderedText.Length + _shownPrompt.Length; i < _maxRendered; i++)
{
C.Write(' ');
}
_maxRendered = _shownPrompt.Length + _renderedText.Length;
// Write one more to ensure that we always wrap around properly if we are at the
// end of a line.
C.Write(' ');
UpdateHomeRow(max);
}
private void CmdTabOrComplete()
{
var complete = false;
if (AutoCompleteEvent != null)
{
if (TabAtStartCompletes)
{
complete = true;
}
else
{
for (var i = 0; i < _cursor; i++)
{
if (char.IsWhiteSpace(_text[i]))
{
continue;
}
complete = true;
break;
}
}
if (complete)
{
var completion = AutoCompleteEvent(_text.ToString(), _cursor);
var completions = completion.Result;
if (completions == null)
{
return;
}
var ncompletions = completions.Length;
if (ncompletions == 0)
{
return;
}
if (completions.Length == 1)
{
InsertTextAtCursor(completions[0]);
}
else
{
var last = -1;
for (var p = 0; p < completions[0].Length; p++)
{
var c = completions[0][p];
for (var i = 1; i < ncompletions; i++)
{
if ((completions[i].Length - 1) < p)
{
goto mismatch;
}
if (completions[i][p] != c)
{
goto mismatch;
}
}
last = p;
}
mismatch:
if (last != -1)
{
InsertTextAtCursor(completions[0].Substring(0, last + 1));
}
SimpleConsole.Wl();
foreach (string s in completions)
{
SimpleConsole.W(completion.Prefix);
SimpleConsole.W(s);
C.Write(' ');
}
SimpleConsole.Wl();
Render();
ForceCursor(_cursor);
}
}
else
{
HandleChar('\t');
}
}
else
{
HandleChar('\t');
}
}