public static bool ReadOrCancel <T>(this ReadlineConfiguration <T> configuration, IConsole console, out T result)
{
var start = console.GetCursorPosition();
console.Write(configuration.Prompt);
var reader = new ConsoleReader(console)
{
Text = configuration.Default
};
var cancelled = false;
Message <T> msg;
do
{
if (!reader.ReadLineOrCancel(out var input))
{
result = default;
cancelled = true;
break;
}
var arrayInput = typeof(T).IsArray ? Command.SimulateParse(input) : new[] { input };
msg = configuration.Parser.Parse(arrayInput);
msg = configuration.Validator.Validate(msg);
if (msg.IsError)
{
ShowError(console, reader, msg.Content);
result = default;
}
else
{
result = msg.Value;
}
} while (msg.IsError);
ApplyCleanup
(
prompt: configuration.Prompt,
console: console,
start: start,
reader: reader,
cleanup: cancelled ? configuration.Cleanup.Cancel : configuration.Cleanup.Success
);
return(!cancelled);
}
public static string ReadLine(this ConsoleReader reader)
{
while (true)
{
var info = reader.Console.ReadKey(true);
if (info.Key == ConsoleKey.Enter)
{
return(reader.Text);
}
else
{
reader.HandleKey(info);
}
}
}
private static void ShowError(IConsole console, ConsoleReader reader, ConsoleString msg)
{
var text = reader.Text;
reader.Text = "";
var red = Color.NoColor.WithForeground("red");
var message = new ConsoleString(msg.Select(s => new ConsoleStringSegment(s.Content, s.HasColor ? s.Color : red)));
console.TemporaryShift(c => c.Write(message));
console.TemporaryShift(c => c.ReadKey(true));
console.TemporaryShift(c => c.Write(new string(' ', message.Length)));
reader.Text = text;
}
public static bool ReadLineOrCancel(this ConsoleReader reader, out string value)
{
while (true)
{
var info = reader.Console.ReadKey(true);
if (info.Key == ConsoleKey.Enter)
{
value = reader.Text;
return(true);
}
else if (info.Key == ConsoleKey.Escape)
{
value = default;
return(false);
}
else
{
reader.HandleKey(info);
}
}
}
public static T Read <T>(this ReadlineConfiguration <T> configuration, IConsole console)
{
var start = console.GetCursorPosition();
console.Write(configuration.Prompt);
var reader = new ConsoleReader(console)
{
Text = configuration.Default
};
Message <T> msg;
do
{
var input = reader.ReadLine();
var arrayInput = typeof(T).IsArray ? Command.SimulateParse(input) : new[] { input };
msg = configuration.Parser.Parse(arrayInput);
msg = configuration.Validator.Validate(msg);
if (msg.IsError)
{
ShowError(console, reader, msg.Content);
}
} while (msg.IsError);
ApplyCleanup
(
prompt: configuration.Prompt,
console: console,
start: start,
reader: reader,
cleanup: configuration.Cleanup.Success
);
return(msg.Value);
}
private static void ApplyCleanup(ConsoleString prompt, IConsole console, ConsolePoint start, ConsoleReader reader, ReadlineCleanup cleanup)
{
switch (cleanup)
{
case ReadlineCleanup.None:
console.WriteLine();
break;
case ReadlineCleanup.RemovePrompt:
var text = reader.Text;
reader.Text = string.Empty;
console.SetCursorPosition(start);
console.Write(new string(' ', prompt.Length));
console.SetCursorPosition(start);
console.WriteLine(text);
break;
case ReadlineCleanup.RemoveAll:
reader.Text = string.Empty;
console.SetCursorPosition(start);
console.Write(new string(' ', prompt.Length));
console.SetCursorPosition(start);
break;
}
}
