From 8e20d2e931b273b54ef369c9b75021ab04118e04 Mon Sep 17 00:00:00 2001 From: Vasily Date: Thu, 27 Feb 2020 14:51:34 +0300 Subject: [PATCH] Simplify AlphanumericComparer, reduce code duplication --- MediaBrowser.Controller/Entities/BaseItem.cs | 8 +- .../Sorting/AlphanumComparator.cs | 32 +++-- .../Sorting/SortExtensions.cs | 122 +----------------- MediaBrowser.Controller/Sorting/SortHelper.cs | 25 ---- 4 files changed, 22 insertions(+), 165 deletions(-) rename {Emby.Server.Implementations => MediaBrowser.Controller}/Sorting/AlphanumComparator.cs (73%) delete mode 100644 MediaBrowser.Controller/Sorting/SortHelper.cs diff --git a/MediaBrowser.Controller/Entities/BaseItem.cs b/MediaBrowser.Controller/Entities/BaseItem.cs index 353c675cb3..09cdfc9eaf 100644 --- a/MediaBrowser.Controller/Entities/BaseItem.cs +++ b/MediaBrowser.Controller/Entities/BaseItem.cs @@ -387,15 +387,12 @@ namespace MediaBrowser.Controller.Entities while (thisMarker < s1.Length) { - if (thisMarker >= s1.Length) - { - break; - } char thisCh = s1[thisMarker]; var thisChunk = new StringBuilder(); + bool isNumeric = char.IsDigit(thisCh); - while ((thisMarker < s1.Length) && (thisChunk.Length == 0 || SortHelper.InChunk(thisCh, thisChunk[0]))) + while ((thisMarker < s1.Length) && (char.IsDigit(thisCh) == isNumeric)) { thisChunk.Append(thisCh); thisMarker++; @@ -406,7 +403,6 @@ namespace MediaBrowser.Controller.Entities } } - var isNumeric = thisChunk.Length > 0 && char.IsDigit(thisChunk[0]); list.Add(new Tuple(thisChunk, isNumeric)); } diff --git a/Emby.Server.Implementations/Sorting/AlphanumComparator.cs b/MediaBrowser.Controller/Sorting/AlphanumComparator.cs similarity index 73% rename from Emby.Server.Implementations/Sorting/AlphanumComparator.cs rename to MediaBrowser.Controller/Sorting/AlphanumComparator.cs index 2e00c24d75..ad1eaf7bf7 100644 --- a/Emby.Server.Implementations/Sorting/AlphanumComparator.cs +++ b/MediaBrowser.Controller/Sorting/AlphanumComparator.cs @@ -2,7 +2,7 @@ using System.Collections.Generic; using System.Text; using MediaBrowser.Controller.Sorting; -namespace Emby.Server.Implementations.Sorting +namespace MediaBrowser.Controller.Sorting { public class AlphanumComparator : IComparer { @@ -31,8 +31,9 @@ namespace Emby.Server.Implementations.Sorting var thisChunk = new StringBuilder(); var thatChunk = new StringBuilder(); + bool thisNumeric = char.IsDigit(thisCh), thatNumeric = char.IsDigit(thatCh); - while ((thisMarker < s1.Length) && (thisChunk.Length == 0 || SortHelper.InChunk(thisCh, thisChunk[0]))) + while ((thisMarker < s1.Length) && (char.IsDigit(thisCh) == thisNumeric)) { thisChunk.Append(thisCh); thisMarker++; @@ -43,7 +44,7 @@ namespace Emby.Server.Implementations.Sorting } } - while ((thatMarker < s2.Length) && (thatChunk.Length == 0 || SortHelper.InChunk(thatCh, thatChunk[0]))) + while ((thatMarker < s2.Length) && (char.IsDigit(thatCh) == thatNumeric)) { thatChunk.Append(thatCh); thatMarker++; @@ -54,38 +55,35 @@ namespace Emby.Server.Implementations.Sorting } } - int result = 0; + // If both chunks contain numeric characters, sort them numerically - if (char.IsDigit(thisChunk[0]) && char.IsDigit(thatChunk[0])) + if (thisNumeric && thatNumeric) { - if (!int.TryParse(thisChunk.ToString(), out thisNumericChunk)) - { - return 0; - } - if (!int.TryParse(thatChunk.ToString(), out thatNumericChunk)) + if (!int.TryParse(thisChunk.ToString(), out thisNumericChunk) + || !int.TryParse(thatChunk.ToString(), out thatNumericChunk)) { return 0; } if (thisNumericChunk < thatNumericChunk) { - result = -1; + return -1; } if (thisNumericChunk > thatNumericChunk) { - result = 1; + return 1; } } else { - result = thisChunk.ToString().CompareTo(thatChunk.ToString()); + int result = thisChunk.ToString().CompareTo(thatChunk.ToString()); + if (result != 0) + { + return result; + } } - if (result != 0) - { - return result; - } } return 0; diff --git a/MediaBrowser.Controller/Sorting/SortExtensions.cs b/MediaBrowser.Controller/Sorting/SortExtensions.cs index 111f4f17fc..bc98c58f0c 100644 --- a/MediaBrowser.Controller/Sorting/SortExtensions.cs +++ b/MediaBrowser.Controller/Sorting/SortExtensions.cs @@ -7,137 +7,25 @@ namespace MediaBrowser.Controller.Sorting { public static class SortExtensions { + private static IComparer _comparer = new AlphanumComparator(); public static IEnumerable OrderByString(this IEnumerable list, Func getName) { - return list.OrderBy(getName, new AlphanumComparator()); + return list.OrderBy(getName, _comparer); } public static IEnumerable OrderByStringDescending(this IEnumerable list, Func getName) { - return list.OrderByDescending(getName, new AlphanumComparator()); + return list.OrderByDescending(getName, _comparer); } public static IOrderedEnumerable ThenByString(this IOrderedEnumerable list, Func getName) { - return list.ThenBy(getName, new AlphanumComparator()); + return list.ThenBy(getName, _comparer); } public static IOrderedEnumerable ThenByStringDescending(this IOrderedEnumerable list, Func getName) { - return list.ThenByDescending(getName, new AlphanumComparator()); - } - - private class AlphanumComparator : IComparer - { - private enum ChunkType { Alphanumeric, Numeric }; - - private static bool InChunk(char ch, char otherCh) - { - var type = ChunkType.Alphanumeric; - - if (char.IsDigit(otherCh)) - { - type = ChunkType.Numeric; - } - - if ((type == ChunkType.Alphanumeric && char.IsDigit(ch)) - || (type == ChunkType.Numeric && !char.IsDigit(ch))) - { - return false; - } - - return true; - } - - 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 || InChunk(thisCh, thisChunk[0]))) - { - thisChunk.Append(thisCh); - thisMarker++; - - if (thisMarker < s1.Length) - { - thisCh = s1[thisMarker]; - } - } - - while ((thatMarker < s2.Length) && (thatChunk.Length == 0 || 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); - } + return list.ThenByDescending(getName, _comparer); } } } diff --git a/MediaBrowser.Controller/Sorting/SortHelper.cs b/MediaBrowser.Controller/Sorting/SortHelper.cs deleted file mode 100644 index 05981d9757..0000000000 --- a/MediaBrowser.Controller/Sorting/SortHelper.cs +++ /dev/null @@ -1,25 +0,0 @@ -namespace MediaBrowser.Controller.Sorting -{ - public static class SortHelper - { - private enum ChunkType { Alphanumeric, Numeric }; - - public static bool InChunk(char ch, char otherCh) - { - var type = ChunkType.Alphanumeric; - - if (char.IsDigit(otherCh)) - { - type = ChunkType.Numeric; - } - - if ((type == ChunkType.Alphanumeric && char.IsDigit(ch)) - || (type == ChunkType.Numeric && !char.IsDigit(ch))) - { - return false; - } - - return true; - } - } -}