2019-01-13 14:54:44 -05:00
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using System.Collections.Generic;
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2013-12-08 15:47:11 -05:00
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using System.Text;
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2016-03-24 16:27:44 -04:00
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using MediaBrowser.Controller.Sorting;
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2013-12-08 15:47:11 -05:00
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2020-02-27 06:51:34 -05:00
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namespace MediaBrowser.Controller.Sorting
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{
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public class AlphanumComparator : IComparer<string>
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{
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public static int CompareValues(string s1, string s2)
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{
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if (s1 == null || s2 == null)
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{
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return 0;
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}
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2013-12-08 21:24:23 -05:00
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int thisMarker = 0, thisNumericChunk = 0;
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int thatMarker = 0, thatNumericChunk = 0;
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2013-12-08 15:47:11 -05:00
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while ((thisMarker < s1.Length) || (thatMarker < s2.Length))
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{
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if (thisMarker >= s1.Length)
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{
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return -1;
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}
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2013-12-08 21:24:23 -05:00
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else if (thatMarker >= s2.Length)
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{
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return 1;
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}
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char thisCh = s1[thisMarker];
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char thatCh = s2[thatMarker];
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2013-12-08 15:47:11 -05:00
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2019-01-13 15:37:13 -05:00
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var thisChunk = new StringBuilder();
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var thatChunk = new StringBuilder();
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2020-02-27 06:51:34 -05:00
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bool thisNumeric = char.IsDigit(thisCh), thatNumeric = char.IsDigit(thatCh);
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2020-02-27 08:02:18 -05:00
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while (thisMarker < s1.Length && char.IsDigit(thisCh) == thisNumeric)
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2013-12-08 15:47:11 -05:00
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{
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thisChunk.Append(thisCh);
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thisMarker++;
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if (thisMarker < s1.Length)
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{
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thisCh = s1[thisMarker];
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}
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}
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2020-02-27 08:02:18 -05:00
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while (thatMarker < s2.Length && char.IsDigit(thatCh) == thatNumeric)
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2013-12-08 15:47:11 -05:00
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{
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thatChunk.Append(thatCh);
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thatMarker++;
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if (thatMarker < s2.Length)
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{
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thatCh = s2[thatMarker];
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}
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}
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2020-02-27 06:51:34 -05:00
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2013-12-08 15:47:11 -05:00
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// If both chunks contain numeric characters, sort them numerically
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if (thisNumeric && thatNumeric)
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{
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if (!int.TryParse(thisChunk.ToString(), out thisNumericChunk)
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|| !int.TryParse(thatChunk.ToString(), out thatNumericChunk))
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2013-12-26 09:20:04 -05:00
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{
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return 0;
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}
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2013-12-08 15:47:11 -05:00
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if (thisNumericChunk < thatNumericChunk)
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{
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2020-02-27 06:51:34 -05:00
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return -1;
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2013-12-08 15:47:11 -05:00
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}
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if (thisNumericChunk > thatNumericChunk)
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{
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return 1;
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2013-12-08 15:47:11 -05:00
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}
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}
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else
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{
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2020-02-27 06:51:34 -05:00
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int result = thisChunk.ToString().CompareTo(thatChunk.ToString());
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if (result != 0)
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{
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return result;
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}
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2013-12-08 15:47:11 -05:00
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}
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}
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return 0;
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}
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public int Compare(string x, string y)
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{
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return CompareValues(x, y);
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}
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}
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}
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