using System;
using System.Windows.Input;
using System.Windows.Markup;

namespace Caliburn.MarkupExtensions
{
    public class GestureExtension : MarkupExtension
    {
        private Key _key = Key.None;
        private ModifierKeys _modifiers = ModifierKeys.None;
        private MouseAction _mouseAction = MouseAction.None;

        public Key Key
        {
            get { return _key; }
            set { _key = value; }
        }

        public ModifierKeys Modifiers
        {
            get { return _modifiers; }
            set { _modifiers = value; }
        }

        public MouseAction MouseAction
        {
            get { return _mouseAction; }
            set { _mouseAction = value; }
        }

        public override object ProvideValue(IServiceProvider serviceProvider)
        {
            if(_key != Key.None)
                return new KeyGesture(_key, _modifiers);
            else return new MouseGesture(_mouseAction, _modifiers);
        }
    }
}