Fix scroll bug (#13)

cui/scroll.go

@@ -1,30 +1,16 @@
 package cui
 
 import (
-	"strings"
-
 	"github.com/jroimartin/gocui"
 )
 
 func scroll(g *gocui.Gui, v *gocui.View, direction int) error {
 	if v != nil {
-		_, y := v.Size()
 		ox, oy := v.Origin()
-		cx, cy := v.Cursor()
-
-		if err := v.SetCursor(cx, cy-1); err != nil && oy > 0 {
-			if err := v.SetOrigin(ox, oy-1); err != nil {
-				return err
-			}
-		}
-		// If we're nearing a boundary
-		if oy+direction > strings.Count(v.ViewBuffer(), "\n")+y-direction {
-			v.Autoscroll = true
-		} else {
-			v.Autoscroll = false
-			v.SetOrigin(ox, oy+direction)
+		if oy+direction >= len(v.BufferLines())-1 {
 			return nil
 		}
+		v.SetOrigin(ox, oy+direction)
 	}
 	return nil
 }