sort images in a 'natural sort' way

go.mod

@@ -18,6 +18,7 @@ require (
 	github.com/evilsocket/islazy v1.11.0 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
+	github.com/maruel/natural v1.1.1 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/ncruces/go-strftime v0.1.9 // indirect
 	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 // indirect

go.sum

@@ -22,6 +22,8 @@ github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/hashicorp/golang-lru/v2 v2.0.7 h1:a+bsQ5rvGLjzHuww6tVxozPZFVghXaHOwFs4luLUK2k=
 github.com/hashicorp/golang-lru/v2 v2.0.7/go.mod h1:QeFd9opnmA6QUJc5vARoKUSoFhyfM2/ZepoAG6RGpeM=
+github.com/maruel/natural v1.1.1 h1:Hja7XhhmvEFhcByqDoHz9QZbkWey+COd9xWfCfn1ioo=
+github.com/maruel/natural v1.1.1/go.mod h1:v+Rfd79xlw1AgVBjbO0BEQmptqb5HvL/k9GRHB7ZKEg=
 github.com/matryer/is v1.4.1 h1:55ehd8zaGABKLXQUe2awZ99BD/PTc2ls+KV/dXphgEQ=
 github.com/matryer/is v1.4.1/go.mod h1:8I/i5uYgLzgsgEloJE1U6xx5HkBQpAZvepWuujKwMRU=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=

main.go

@@ -7,12 +7,14 @@ import (
 	"log"
 	"os"
 	"path/filepath"
+	"slices"
 	"strconv"
 	"strings"
 
 	"git.yetaga.in/alazyreader/why/filetypes"
 	"github.com/dblezek/tga"
 	"github.com/disintegration/imaging"
+	"github.com/maruel/natural"
 	"golang.org/x/image/webp"
 	tk "modernc.org/tk9.0"
 )
@@ -92,14 +94,20 @@ func newBrowse(file string) {
 		return
 	}
 	directoryState.images = []string{}
-	i := 0
 	for _, v := range dirfiles {
 		if filetypes.IsImage(v) {
 			directoryState.images = append(directoryState.images, v.Name())
-			if filepath.Join(directoryState.dir, v.Name()) == file {
-				directoryState.i = i
-			}
-			i++
+		}
+	}
+	slices.SortFunc(directoryState.images, func(a, b string) int {
+		if natural.Less(a, b) {
+			return -1
+		}
+		return 1
+	})
+	for i, v := range directoryState.images {
+		if v == file {
+			directoryState.i = i
 		}
 	}
 	updateImage(file)