Make --accept-nth compatible with --select-1

Fix #4287

src/core.go

@@ -476,8 +476,17 @@ func Run(opts *Options) (int, error) {
 									if len(opts.Expect) > 0 {
 										opts.Printer("")
 									}
+									transformer := func(item *Item) string {
+										return item.AsString(opts.Ansi)
+									}
+									if opts.AcceptNth != nil {
+										fn := opts.AcceptNth(opts.Delimiter)
+										transformer = func(item *Item) string {
+											return item.acceptNth(opts.Ansi, opts.Delimiter, fn)
+										}
+									}
 									for i := 0; i < count; i++ {
-										opts.Printer(val.Get(i).item.AsString(opts.Ansi))
+										opts.Printer(transformer(val.Get(i).item))
 									}
 									if count == 0 {
 										exitCode = ExitNoMatch

src/item.go

@@ -51,3 +51,9 @@ func (item *Item) AsString(stripAnsi bool) string {
 	}
 	return item.text.ToString()
 }
+
+func (item *Item) acceptNth(stripAnsi bool, delimiter Delimiter, transformer func([]Token, int32) string) string {
+	tokens := Tokenize(item.AsString(stripAnsi), delimiter)
+	transformed := transformer(tokens, item.Index())
+	return StripLastDelimiter(transformed, delimiter)
+}

src/terminal.go

@@ -1575,9 +1575,7 @@ func (t *Terminal) output() bool {
 	}
 	if t.acceptNth != nil {
 		transform = func(item *Item) string {
-			tokens := Tokenize(item.AsString(t.ansi), t.delimiter)
-			transformed := t.acceptNth(tokens, item.Index())
-			return StripLastDelimiter(transformed, t.delimiter)
+			return item.acceptNth(t.ansi, t.delimiter, t.acceptNth)
 		}
 	}
 	found := len(t.selected) > 0