Implement :next-message n%

commands/next-message.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"strconv"
+	"strings"
 
 	"git.sr.ht/~sircmpwn/aerc2/widgets"
 )
@@ -14,7 +15,7 @@ func init() {
 }
 
 func nextPrevMessageUsage(cmd string) error {
-	return errors.New(fmt.Sprintf("Usage: %s [n]", cmd))
+	return errors.New(fmt.Sprintf("Usage: %s [<n>[%]]", cmd))
 }
 
 func NextPrevMessage(aerc *widgets.Aerc, args []string) error {
@@ -24,14 +25,22 @@ func NextPrevMessage(aerc *widgets.Aerc, args []string) error {
 	var (
 		n   int = 1
 		err error
+		pct bool
 	)
 	if len(args) > 1 {
+		if strings.HasSuffix(args[1], "%") {
+			pct = true
+			args[1] = args[1][:len(args[1])-1]
+		}
 		n, err = strconv.Atoi(args[1])
 		if err != nil {
 			return nextPrevMessageUsage(args[0])
 		}
 	}
 	acct := aerc.SelectedAccount()
+	if pct {
+		n = int(float64(acct.Messages().Height()) * (float64(n) / 100.0))
+	}
 	for ; n > 0; n-- {
 		if args[0] == "prev-message" {
 			acct.Messages().Prev()

widgets/msglist.go

@@ -13,6 +13,7 @@ import (
 type MessageList struct {
 	conf         *config.AercConfig
 	logger       *log.Logger
+	height       int
 	onInvalidate func(d ui.Drawable)
 	selected     int
 	spinner      *Spinner
@@ -45,6 +46,7 @@ func (ml *MessageList) Invalidate() {
 }
 
 func (ml *MessageList) Draw(ctx *ui.Context) {
+	ml.height = ctx.Height()
 	ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', tcell.StyleDefault)
 
 	if ml.store == nil {
@@ -91,6 +93,10 @@ func (ml *MessageList) Draw(ctx *ui.Context) {
 	}
 }
 
+func (ml *MessageList) Height() int {
+	return ml.height
+}
+
 func (ml *MessageList) SetStore(store *lib.MessageStore) {
 	ml.store = store
 	if store != nil {