Add index option to change-tab

This allows selection of a tab using its index. It attempts to parse the
given argument as a number, if it fails then it uses it as a name.

Also supports relative indexes using prefixed + or -.

1 files changed, 23 insertions, 4 deletions

diff --git a/commands/ct.go b/commands/ct.go
index 19fb63a..4e66331 100644
--- a/commands/ct.go
+++ b/commands/ct.go
@@ -3,6 +3,7 @@ package commands
 import (
 	"errors"
 	"fmt"
+	"strconv"
 	"strings"
 
 	"git.sr.ht/~sircmpwn/aerc/widgets"
@@ -35,16 +36,34 @@ func (_ ChangeTab) Execute(aerc *widgets.Aerc, args []string) error {
 	if len(args) != 2 {
 		return errors.New(fmt.Sprintf("Usage: %s <tab>", args[0]))
 	}
-
 	if args[1] == "-" {
 		ok := aerc.SelectPreviousTab()
 		if !ok {
 			return errors.New("No previous tab to return to")
 		}
 	} else {
-		ok := aerc.SelectTab(args[1])
-		if !ok {
-			return errors.New("No tab with that name")
+		n, err := strconv.Atoi(args[1])
+		if err == nil {
+			if strings.HasPrefix(args[1], "+") {
+				for ; n > 0; n-- {
+					aerc.NextTab()
+				}
+			} else if strings.HasPrefix(args[1], "-") {
+				for ; n < 0; n++ {
+					aerc.PrevTab()
+				}
+			} else {
+				ok := aerc.SelectTabIndex(n)
+				if !ok {
+					return errors.New(
+						"No tab with that index")
+				}
+			}
+		} else {
+			ok := aerc.SelectTab(args[1])
+			if !ok {
+				return errors.New("No tab with that name")
+			}
 		}
 	}
 	return nil