//cursorDown moves the cursor down one position. When reaching the bottom, windows the text
func (c *CUI) cursorDown(g *gocui.Gui, v *gocui.View) error {
if v != nil {
cx, cy := v.Cursor()
if err := v.SetCursor(cx, cy+1); err != nil {
ox, oy := v.Origin()
if err := v.SetOrigin(ox, oy+1); err != nil {
return err
}
}
}
return nil
}
//cursorUp moves the cursor up one position. When reaching the top, windows the text
func (c *CUI) cursorUp(g *gocui.Gui, v *gocui.View) error {
if v != nil {
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
}
}
}
return nil
}
//getCursorListPos returns the position of selection in the given view
func (c *CUI) getCursorListPos(g *gocui.Gui, v *gocui.View) (y int) {
_, oy := v.Origin()
_, cy := v.Cursor()
y = oy + cy
return
}