Implement basic tab completion support

Tab completion currently only works on commands. Contextual completion
will be added in the future.

1 files changed, 14 insertions, 5 deletions

diff --git a/commands/next-tab.go b/commands/next-tab.go
index fb5b6645..aa6e1dc1 100644
--- a/commands/next-tab.go
+++ b/commands/next-tab.go
@@ -8,16 +8,21 @@ import (
 	"git.sr.ht/~sircmpwn/aerc/widgets"
 )
 
+type NextPrevTab struct{}
+
 func init() {
-	register("next-tab", NextPrevTab)
-	register("prev-tab", NextPrevTab)
+	register(NextPrevTab{})
 }
 
-func nextPrevTabUsage(cmd string) error {
-	return errors.New(fmt.Sprintf("Usage: %s [n]", cmd))
+func (_ NextPrevTab) Aliases() []string {
+	return []string{"next-tab", "prev-tab"}
+}
+
+func (_ NextPrevTab) Complete(aerc *widgets.Aerc, args []string) []string {
+	return nil
 }
 
-func NextPrevTab(aerc *widgets.Aerc, args []string) error {
+func (_ NextPrevTab) Execute(aerc *widgets.Aerc, args []string) error {
 	if len(args) > 2 {
 		return nextPrevTabUsage(args[0])
 	}
@@ -40,3 +45,7 @@ func NextPrevTab(aerc *widgets.Aerc, args []string) error {
 	}
 	return nil
 }
+
+func nextPrevTabUsage(cmd string) error {
+	return errors.New(fmt.Sprintf("Usage: %s [n]", cmd))
+}