public static bool ReadOrCancel <T>(this ReadcharConfiguration <T> configuration, IConsole console, out T result)
{
if (configuration.Options.Count == 0)
{
throw new System.ArgumentException("Configuration must support at least one option.");
}
var start = console.GetCursorPosition();
console.Write(configuration.Prompt);
System.ConsoleKeyInfo input;
do
{
input = console.ReadKey(true);
if (input.Key == System.ConsoleKey.Escape)
{
console.WriteLine();
result = default;
return(false);
}
} while (!configuration.Options.TryGetValue(input.KeyChar, out result));
console.WriteLine();
return(true);
}
public static ReadcharConfiguration <T> WithPrompt <T>(this ReadcharConfiguration <T> composer, ConsoleString prompt)
{
return(new ReadcharConfiguration <T>
(
prompt: prompt,
options: composer.Options
));
}
public static ReadcharConfiguration <T> WithOption <T>(this ReadcharConfiguration <T> composer, char character, T value)
{
return(new ReadcharConfiguration <T>
(
prompt: composer.Prompt,
options: composer.Options.SetItem(character, value)
));
}
public static T Read <T>(this ReadcharConfiguration <T> configuration, IConsole console)
{
if (configuration.Options.Count == 0)
{
throw new System.ArgumentException("Configuration must support at least one option.");
}
var start = console.GetCursorPosition();
console.Write(configuration.Prompt);
System.ConsoleKeyInfo input;
T value;
do
{
input = console.ReadKey(true);
} while (!configuration.Options.TryGetValue(input.KeyChar, out value));
console.WriteLine();
return(value);
}
public static ReadcharConfiguration <T> WithoutPrompt <T>(this ReadcharConfiguration <T> composer) => composer.WithPrompt(ConsoleString.Empty);