private void CommandTextBox_OnKeyDown(object sender, KeyEventArgs e)
{
if (e.Key == Key.Enter)
{
MyContext.ExecuteCommand(CommandTextBox.Text.Trim());
PreviousCommands.Add(CommandTextBox.Text.Trim());
CommandTextBox.Text = "";
PrevCommandIndex = PreviousCommands.Count;
e.Handled = true;
}
else if (e.Key == Key.Up)
{
if (PrevCommandIndex > 0)
{
PrevCommandIndex--;
CommandTextBox.Text = PreviousCommands[PrevCommandIndex];
CommandTextBox.SelectionStart = CommandTextBox.Text.Length;
}
}
else if (e.Key == Key.Down)
{
if (PrevCommandIndex < PreviousCommands.Count - 1)
{
PrevCommandIndex++;
CommandTextBox.Text = PreviousCommands[PrevCommandIndex];
CommandTextBox.SelectionStart = CommandTextBox.Text.Length;
}
else
{
CommandTextBox.Text = "";
PrevCommandIndex = PreviousCommands.Count;
}
}
}
public static string ReadHintedLine <T, TResult>(IEnumerable <T> hintSource, Func <T, TResult> hintField, string inputRegex = ".*", ConsoleColor hintColor = ConsoleColor.DarkGray, string linePrefix = "")
{
ConsoleKeyInfo input;
var suggestion = string.Empty;
var userInput = string.Empty;
var readLine = string.Empty;
var characterIndex = 0;
if (!string.IsNullOrWhiteSpace(linePrefix))
{
Console.Write(linePrefix);
}
while (ConsoleKey.Enter != (input = Console.ReadKey()).Key)
{
if (input.Key == ConsoleKey.UpArrow)
{
if (PreviousCommandIndex > 0)
{
PreviousCommandIndex--;
userInput = PreviousCommands[PreviousCommandIndex];
characterIndex = userInput.Length;
}
}
else if (input.Key == ConsoleKey.DownArrow)
{
if (PreviousCommandIndex < PreviousCommands.Count - 1)
{
PreviousCommandIndex++;
userInput = PreviousCommands[PreviousCommandIndex];
characterIndex = userInput.Length;
}
else
{
PreviousCommandIndex = PreviousCommands.Count;
userInput = "";
characterIndex = userInput.Length;
}
}
else if (input.Key == ConsoleKey.LeftArrow)
{
if (characterIndex > 0)
{
characterIndex--;
}
}
else if (input.Key == ConsoleKey.RightArrow)
{
if (characterIndex < userInput.Length)
{
characterIndex++;
}
}
else if (input.Key == ConsoleKey.Home)
{
characterIndex = 0;
}
else if (input.Key == ConsoleKey.End)
{
characterIndex = userInput.Length;
}
else if (input.Key == ConsoleKey.L && input.Modifiers == ConsoleModifiers.Control)
{
return("clear();");
}
else if (input.Key == ConsoleKey.Escape)
{
userInput = "";
characterIndex = userInput.Length;
}
else if (input.Key == ConsoleKey.Backspace)
{
if (characterIndex > 0)
{
userInput = userInput.Any() ? userInput.Remove(characterIndex - 1, 1) : string.Empty;
characterIndex--;
}
}
else if (input.Key == ConsoleKey.Tab)
{
userInput = suggestion ?? userInput;
characterIndex = userInput.Length;
}
else if (input != null && Regex.IsMatch(input.KeyChar.ToString(), inputRegex))
{
if (!string.IsNullOrWhiteSpace(input.KeyChar.ToString()) || input.Key == ConsoleKey.Spacebar)
{
if (userInput.Length == characterIndex)
{
userInput += input.KeyChar.ToString();
}
else
{
userInput = userInput.Insert(characterIndex, input.KeyChar.ToString());
}
characterIndex++;
}
}
suggestion = hintSource.Select(item => hintField(item).ToString())
.FirstOrDefault(item => item.Length > userInput.Length && item.Substring(0, userInput.Length) == userInput);
readLine = userInput;
ClearCurrentConsoleLine(linePrefix);
Console.Write(userInput);
var originalColor = Console.ForegroundColor;
Console.ForegroundColor = hintColor;
if (userInput.Any() && !string.IsNullOrWhiteSpace(suggestion))
{
Console.Write(suggestion.Substring(userInput.Length, suggestion.Length - userInput.Length));
}
Console.ForegroundColor = originalColor;
Console.SetCursorPosition(linePrefix.Length + characterIndex, Console.CursorTop);
}
ClearCurrentConsoleLine(linePrefix);
Console.WriteLine(readLine);
if (!string.IsNullOrWhiteSpace(readLine))
{
PreviousCommands.Add(readLine);
}
PreviousCommandIndex = PreviousCommands.Count;
return(readLine);
}