commands/msgview: Add next/prev commands

Signed-off-by: Kevin Kuehler <kkuehler@brave.com>

commands/account/next.go

@@ -48,9 +48,11 @@ func NextPrevMessage(aerc *widgets.Aerc, args []string) error {
 	}
 	for ; n > 0; n-- {
 		if args[0] == "prev-message" || args[0] == "prev" {
-			acct.Messages().Prev()
+			acct.Store().Prev()
+			acct.Messages().Scroll()
 		} else {
-			acct.Messages().Next()
+			acct.Store().Next()
+			acct.Messages().Scroll()
 		}
 	}
 	return nil

commands/msgview/next.go

@@ -0,0 +1,36 @@
+package msgview
+
+import (
+	"errors"
+
+	"git.sr.ht/~sircmpwn/aerc/widgets"
+)
+
+func init() {
+	register("next", NextPrevMessage)
+	register("next-message", NextPrevMessage)
+	register("prev", NextPrevMessage)
+	register("prev-message", NextPrevMessage)
+}
+
+func NextPrevMessage(aerc *widgets.Aerc, args []string) error {
+	mv, _ := aerc.SelectedTab().(*widgets.MessageViewer)
+	acct := mv.SelectedAccount()
+	store := mv.Store()
+	if acct == nil {
+		return errors.New("No account selected")
+	}
+	if args[0] == "prev-message" || args[0] == "prev" {
+		store.Prev()
+	} else {
+		store.Next()
+	}
+	nextMsg := store.Selected()
+	if nextMsg == nil {
+		aerc.RemoveTab(mv)
+		return nil
+	}
+	nextMv := widgets.NewMessageViewer(acct, aerc.Config(), store, nextMsg)
+	aerc.ReplaceTab(mv, nextMv, nextMsg.Envelope.Subject)
+	return nil
+}