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Root/src/Media/MediaQueue.cs

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#region License
/* FNA - XNA4 Reimplementation for Desktop Platforms
 * Copyright 2009-2016 Ethan Lee and the MonoGame Team
 *
 * Released under the Microsoft Public License.
 * See LICENSE for details.
 */
#endregion
 
#region Using Statements
using System;
using System.Collections.Generic;
#endregion
 
namespace Microsoft.Xna.Framework.Media
{
    public sealed class MediaQueue
    {
        #region Public Properties
 
        public Song ActiveSong
        {
            get
            {
                if (songs.Count == 0 || ActiveSongIndex < 0)
                {
                    return null;
                }
 
                return songs[ActiveSongIndex];
            }
        }
 
        public int ActiveSongIndex
        {
            get;
            set;
        }
 
        public int Count
        {
            get
            {
                return songs.Count;
            }
        }
 
        public Song this[int index]
        {
            get
            {
                return songs[index];
            }
        }
 
        #endregion
 
        #region Internal Properties
 
        internal IEnumerable<Song> Songs
        {
            get
            {
                return songs;
            }
        }
 
        internal Song GetNextSong(int direction, bool shuffle)
        {
            if (shuffle)
            {
                ActiveSongIndex = random.Next(songs.Count);
            }
            else
            {
                ActiveSongIndex = (int) MathHelper.Clamp(
                    ActiveSongIndex + direction,
                    0,
                    songs.Count - 1
                );
            }
 
            return songs[ActiveSongIndex];
        }
 
        #endregion
 
        #region Private Variables
 
        private List<Song> songs = new List<Song>();
        private Random random = new Random();
 
        #endregion
 
        #region Public Constructor
 
        public MediaQueue()
        {
            ActiveSongIndex = -1;
        }
 
        #endregion
 
        #region Internal Methods
 
        internal void Add(Song song)
        {
            songs.Add(song);
        }
 
        internal void Clear()
        {
            Song song;
            while (songs.Count > 0)
            {
                song = songs[0];
                song.Stop();
                songs.Remove(song);
            }
        }
 
        internal void SetVolume(float volume)
        {
            int count = songs.Count;
            for (int i = 0; i < count; i += 1)
            {
                songs[i].Volume = volume;
            }
        }
 
        internal void Stop()
        {
            int count = songs.Count;
            for (int i = 0; i < count; i += 1)
            {
                songs[i].Stop();
            }
        }
 
        #endregion
 
    }
}

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