func ExecMenu(title string, comm types.Communicable, build func(*Menu)) {
pageIndex := 0
pageCount := 1
filter := ""
for {
var menu Menu
menu.title = title
build(&menu)
pageIndex = Bound(pageIndex, 0, pageCount-1)
pageCount = menu.Print(comm, pageIndex, filter)
filter = ""
prompt := ""
if pageCount > 1 {
prompt = fmt.Sprintf("Page %v of %v (<, >, <<, >>)\r\n> ", pageIndex+1, pageCount)
} else {
prompt = "> "
}
input := comm.GetInput(types.Colorize(types.ColorWhite, prompt))
if input == "" {
if menu.exitHandler != nil {
menu.exitHandler()
}
return
}
if input == ">" {
pageIndex++
} else if input == "<" {
pageIndex--
} else if input == ">>" {
pageIndex = pageCount - 1
} else if input == "<<" {
pageIndex = 0
} else if input[0] == '/' {
filter = input[1:]
} else {
action := menu.getAction(input)
if action.handler != nil {
if !action.handler() {
return
}
} else if input != "?" && input != "help" {
comm.WriteLine(types.Colorize(types.ColorRed, "Invalid selection"))
}
}
}
}
func (self *Menu) Print(comm types.Communicable, page int, filter string) int {
border := types.Colorize(types.ColorWhite, "-=-=-")
title := types.Colorize(types.ColorBlue, self.title)
header := fmt.Sprintf("%s %s %s", border, title, border)
if filter != "" {
header = fmt.Sprintf("%s (/%s)", header, filter)
}
comm.WriteLine(header)
options := make([]string, len(self.actions))
for i, action := range self.actions {
index := strings.Index(strings.ToLower(action.text), action.key)
actionText := ""
if index == -1 {
actionText = fmt.Sprintf("%s[%s%s%s]%s%s",
types.ColorDarkBlue,
types.ColorBlue,
strings.ToUpper(action.key),
types.ColorDarkBlue,
types.ColorWhite,
action.text)
} else {
keyLength := len(action.key)
actionText = fmt.Sprintf("%s%s[%s%s%s]%s%s",
action.text[:index],
types.ColorDarkBlue,
types.ColorBlue,
action.text[index:index+keyLength],
types.ColorDarkBlue,
types.ColorWhite,
action.text[index+keyLength:])
}
options[i] = fmt.Sprintf(" %s", actionText)
}
options = Filter(options, filter)
width, height := comm.GetWindowSize()
pages := Paginate(options, width, height/2)
if len(options) == 0 && filter != "" {
comm.WriteLine("No items match your search")
} else {
comm.Write(pages[page])
}
return len(pages)
}