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cchat-gtk/internal/ui/primitives/actions/stateful.go

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package actions
import (
"log"
"strings"
"github.com/gotk3/gotk3/glib"
)
// Stateful is a stateful action group, which would allow additional methods
// that would otherwise be impossible to do with a simple Action Map.
type Stateful struct {
glib.IActionGroup
group *glib.SimpleActionGroup
labels []string // labels
}
func NewStateful() *Stateful {
group := glib.SimpleActionGroupNew()
return &Stateful{
IActionGroup: group,
group: group,
}
}
func (s *Stateful) Reset() {
for _, label := range s.labels {
s.group.RemoveAction(ActionName(label))
}
s.labels = nil
}
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// Len returns the number of menu entries.
func (s *Stateful) Len() int {
return len(s.labels)
}
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func (s *Stateful) AddAction(label string, call func()) {
sa := glib.SimpleActionNew(ActionName(label), nil)
sa.Connect("activate", call)
s.labels = append(s.labels, label)
s.group.AddAction(sa)
}
func (s *Stateful) LookupAction(label string) *glib.Action {
for _, l := range s.labels {
if l == label {
return s.group.LookupAction(ActionName(label))
}
}
return nil
}
func (s *Stateful) RemoveAction(label string) {
for i, l := range s.labels {
if l == label {
s.labels = append(s.labels[:i], s.labels[:i+1]...)
s.group.RemoveAction(ActionName(label))
return
}
}
}
// ActionName converts the label name into the action name.
func ActionName(label string) (actionName string) {
actionName = strings.Replace(label, " ", "-", -1)
if !glib.ActionNameIsValid(actionName) {
log.Panicf("Label makes for invalid action name %q\n", actionName)
}
return
}