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Merge pull request #2474 from JustAMan/simplify-sorting

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Simplify AlphanumericComparer, reduce code duplication
This commit is contained in:
Bond-009
2020-03-02 12:28:31 +01:00
committed by GitHub
parent 13d30a0a79 376bbb40bd
commit 1c21248e2e
4 changed files with 22 additions and 165 deletions
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99
Emby.Server.Implementations/Sorting/AlphanumComparator.cs
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@@ -1,99 +0,0 @@
using System.Collections.Generic;
using System.Text;
using MediaBrowser.Controller.Sorting;
namespace Emby.Server.Implementations.Sorting
{
public class AlphanumComparator : IComparer<string>
{
public static int CompareValues(string s1, string s2)
{
if (s1 == null || s2 == null)
{
return 0;
}
int thisMarker = 0, thisNumericChunk = 0;
int thatMarker = 0, thatNumericChunk = 0;
while ((thisMarker < s1.Length) || (thatMarker < s2.Length))
{
if (thisMarker >= s1.Length)
{
return -1;
}
else if (thatMarker >= s2.Length)
{
return 1;
}
char thisCh = s1[thisMarker];
char thatCh = s2[thatMarker];
var thisChunk = new StringBuilder();
var thatChunk = new StringBuilder();
while ((thisMarker < s1.Length) && (thisChunk.Length == 0 || SortHelper.InChunk(thisCh, thisChunk[0])))
{
thisChunk.Append(thisCh);
thisMarker++;
if (thisMarker < s1.Length)
{
thisCh = s1[thisMarker];
}
}
while ((thatMarker < s2.Length) && (thatChunk.Length == 0 || SortHelper.InChunk(thatCh, thatChunk[0])))
{
thatChunk.Append(thatCh);
thatMarker++;
if (thatMarker < s2.Length)
{
thatCh = s2[thatMarker];
}
}
int result = 0;
// If both chunks contain numeric characters, sort them numerically
if (char.IsDigit(thisChunk[0]) && char.IsDigit(thatChunk[0]))
{
if (!int.TryParse(thisChunk.ToString(), out thisNumericChunk))
{
return 0;
}
if (!int.TryParse(thatChunk.ToString(), out thatNumericChunk))
{
return 0;
}
if (thisNumericChunk < thatNumericChunk)
{
result = -1;
}
if (thisNumericChunk > thatNumericChunk)
{
result = 1;
}
}
else
{
result = thisChunk.ToString().CompareTo(thatChunk.ToString());
}
if (result != 0)
{
return result;
}
}
return 0;
}
public int Compare(string x, string y)
{
return CompareValues(x, y);
}
}
}