QuickLook/QuickLook.Plugin/QuickLook.Plugin.VideoViewer/Converters.cs

// Copyright © 2017 Paddy Xu
// 
// This file is part of QuickLook program.
// 
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

using System;
using System.Globalization;
using System.Windows;
using System.Windows.Data;

namespace QuickLook.Plugin.VideoViewer
{
    public sealed class DecimalToTimeSpanConverter : DependencyObject, IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value == null)
                return "00:00:00";

            var time = TimeSpan.FromSeconds((double) (decimal) value);

            return time.ToString(@"hh\:mm\:ss");
        }

        object IValueConverter.ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

    public sealed class DoubleToTimeSpanConverter : DependencyObject, IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value == null)
                return "00:00:00";

            var time = TimeSpan.FromSeconds((double) value);

            return time.ToString(@"hh\:mm\:ss");
        }

        object IValueConverter.ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

    public sealed class BooleanToVisibilityHiddenConverter : DependencyObject, IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value == null)
                return Visibility.Hidden;

            var v = (bool) value;

            return v ? Visibility.Hidden : Visibility.Visible;
        }

        object IValueConverter.ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

    public class TimeSpanToSecondsConverter : IValueConverter
    {
        public object Convert(object value, Type targetType,
            object parameter, CultureInfo culture)
        {
            if (value is TimeSpan) return ((TimeSpan) value).TotalSeconds;
            if (value is Duration)
                return ((Duration) value).HasTimeSpan ? ((Duration) value).TimeSpan.TotalSeconds : 0d;

            return 0d;
        }

        public object ConvertBack(object value, Type targetType,
            object parameter, CultureInfo culture)
        {
            var result = TimeSpan.FromTicks((long) Math.Round(TimeSpan.TicksPerSecond * (double) value, 0));
            // Do the conversion from visibility to bool
            if (targetType == typeof(TimeSpan)) return result;
            if (targetType == typeof(Duration)) return new Duration(result);

            return Activator.CreateInstance(targetType);
        }
    }
}