using System.Linq;
using System.Windows.Forms;

namespace JD.WinFormExtensions
{
    public static class TextBoxEditionHelper
    {
        public static bool DefaultIsKeyHandled(Keys keyModifiers, Keys keyCode)
        {
            if (keyModifiers == Keys.Control && keyCode.IsIn(Keys.A, Keys.C, Keys.V, Keys.X, Keys.Y, Keys.Z))
            {
                return true;
            }

            return (keyModifiers == Keys.None || keyModifiers == Keys.Shift) && (keyCode < Keys.F1 || keyCode > Keys.F12);
        }

        private static bool IsIn<T>(this T value, params T[] set)
        {
            return set.Contains(value);
        }

        /// <summary>
        /// Which numeric keys are handled on a numeric control.
        /// </summary>
        public static bool DefaultIsNumericKeyHandled(Keys keyModifiers, Keys keyCode)
        {
            bool handled = DefaultIsKeyHandled(keyModifiers, keyCode);

            // Alpha keys are not handled by the numeric up down.
            if (handled && keyModifiers == Keys.None && keyCode >= Keys.A && keyCode <= Keys.Z)
            {
                handled = false;
            }

            return handled;
        }
    }
}