// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.Collections;
using System.ComponentModel;
 
namespace System.Drawing.Printing;
 
public partial class PrinterSettings
{
    /// <summary>
    ///  Collection of <see cref="PaperSize"/> objects.
    /// </summary>
    public class PaperSizeCollection : ICollection
    {
        private PaperSize[] _array;
 
        /// <summary>
        ///  Initializes a new instance of the <see cref='PaperSizeCollection'/> class.
        /// </summary>
        public PaperSizeCollection(PaperSize[] array) => _array = array;
 
        /// <summary>
        ///  Gets a value indicating the number of paper sizes.
        /// </summary>
        public int Count => _array.Length;
 
        /// <summary>
        ///  Retrieves the <see cref="PaperSize"/> with the specified index.
        /// </summary>
        public virtual PaperSize this[int index] => _array[index];
 
        public IEnumerator GetEnumerator() => new ArrayEnumerator(_array, Count);
 
        int ICollection.Count => Count;
 
        bool ICollection.IsSynchronized => false;
 
        object ICollection.SyncRoot => this;
 
        void ICollection.CopyTo(Array array, int index) => Array.Copy(_array, index, array, 0, _array.Length);
 
        public void CopyTo(PaperSize[] paperSizes, int index) => Array.Copy(_array, index, paperSizes, 0, _array.Length);
 
        IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
 
        [EditorBrowsable(EditorBrowsableState.Never)]
        public int Add(PaperSize paperSize)
        {
            PaperSize[] newArray = new PaperSize[Count + 1];
            ((ICollection)this).CopyTo(newArray, 0);
            newArray[Count] = paperSize;
            _array = newArray;
            return Count;
        }
    }
}