//
// SelectAllSelection.cs
//
// Author:
//   Gabriel Burt <gburt@novell.com>
//
// Copyright (C) 2008 Novell, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System;

using Hyena.Collections;

namespace Banshee.Collection
{
    public class SelectAllSelection : Selection
    {
        public SelectAllSelection () : base ()
        {
        }

        protected override void OnChanged ()
        {
            if (Count == 0 || base.AllSelected) {
                Clear (false);
                QuietSelect (0);
            }

            base.OnChanged ();
        }

        public override void SelectAll ()
        {
            Clear (false);
            Select (0);
        }

        public override bool AllSelected {
            get {
                if (Contains (0)) {
                    return true;
                }

                // Same as base.AllSelected except range can start at 1 or 0
                if (RangeCollection.RangeCount == 1) {
                    RangeCollection.Range range = RangeCollection.Ranges[0];
                    return range.Start <= 1 && range.End == MaxIndex;
                }

                return false;
            }
        }
    }
}
