91 lines
1.8 KiB
C#
91 lines
1.8 KiB
C#
#region Copyright & License Information
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/*
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* Copyright (c) The OpenRA Developers and Contributors
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version. For more
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* information, see COPYING.
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*/
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#endregion
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using System.Collections;
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using System.Collections.Generic;
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namespace OpenRA
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{
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public readonly struct CellCoordsRegion : IEnumerable<CPos>
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{
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public struct CellCoordsEnumerator : IEnumerator<CPos>
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{
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readonly CellCoordsRegion r;
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public CellCoordsEnumerator(CellCoordsRegion region)
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: this()
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{
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r = region;
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Reset();
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}
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public bool MoveNext()
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{
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var x = Current.X + 1;
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var y = Current.Y;
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// Check for column overflow.
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if (x > r.BottomRight.X)
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{
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y++;
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x = r.TopLeft.X;
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// Check for row overflow.
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if (y > r.BottomRight.Y)
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return false;
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}
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Current = new CPos(x, y);
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return true;
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}
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public void Reset()
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{
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Current = new CPos(r.TopLeft.X - 1, r.TopLeft.Y);
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}
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public CPos Current { get; private set; }
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readonly object IEnumerator.Current => Current;
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public readonly void Dispose() { }
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}
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public CellCoordsRegion(CPos topLeft, CPos bottomRight)
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{
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TopLeft = topLeft;
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BottomRight = bottomRight;
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}
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public override string ToString()
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{
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return $"{TopLeft}->{BottomRight}";
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}
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public CellCoordsEnumerator GetEnumerator()
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{
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return new CellCoordsEnumerator(this);
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}
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IEnumerator<CPos> IEnumerable<CPos>.GetEnumerator()
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{
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return GetEnumerator();
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}
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IEnumerator IEnumerable.GetEnumerator()
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{
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return GetEnumerator();
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}
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public CPos TopLeft { get; }
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public CPos BottomRight { get; }
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}
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}
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