// GrabKeyboard grabs the entire keyboard.
// Returns whether GrabStatus is successful and an error if one is reported by
// XGB. It is possible to not get an error and the grab to be unsuccessful.
// The purpose of 'win' is that after a grab is successful, ALL Key*Events will
// be sent to that window. Make sure you have a callback attached :-)
func GrabKeyboard(xu *xgbutil.XUtil, win xproto.Window) error {
reply, err := xproto.GrabKeyboard(xu.Conn(), false, win, 0,
xproto.GrabModeAsync, xproto.GrabModeAsync).Reply()
if err != nil {
return fmt.Errorf("GrabKeyboard: Error grabbing keyboard on "+
"window '%x': %s", win, err)
}
switch reply.Status {
case xproto.GrabStatusSuccess:
// all is well
case xproto.GrabStatusAlreadyGrabbed:
return fmt.Errorf("GrabKeyboard: Could not grab keyboard. " +
"Status: AlreadyGrabbed.")
case xproto.GrabStatusInvalidTime:
return fmt.Errorf("GrabKeyboard: Could not grab keyboard. " +
"Status: InvalidTime.")
case xproto.GrabStatusNotViewable:
return fmt.Errorf("GrabKeyboard: Could not grab keyboard. " +
"Status: NotViewable.")
case xproto.GrabStatusFrozen:
return fmt.Errorf("GrabKeyboard: Could not grab keyboard. " +
"Status: Frozen.")
}
return nil
}
// Lock grabs the keyboard and pointer locking the X11 display
func Lock(X *xgb.Conn) error {
screen := xproto.Setup(X).DefaultScreen(X)
passEventsToOwner := false
kbCookie := xproto.GrabKeyboard(X, passEventsToOwner, screen.Root, xproto.TimeCurrentTime, xproto.GrabModeAsync, xproto.GrabModeAsync)
kbReply, err := kbCookie.Reply()
if err != nil {
return err
}
if kbReply.Status != xproto.GrabStatusSuccess {
return fmt.Errorf("GrabKeyboard status %v", grabStatus(kbReply.Status))
}
ptrCookie := xproto.GrabPointer(X, passEventsToOwner, screen.Root, 0, xproto.GrabModeAsync, xproto.GrabModeAsync, xproto.AtomNone, xproto.AtomNone, xproto.TimeCurrentTime)
ptrReply, err := ptrCookie.Reply()
if err != nil {
xproto.UngrabKeyboard(X, xproto.TimeCurrentTime)
return err
}
if ptrReply.Status != xproto.GrabStatusSuccess {
return fmt.Errorf("GrabPointer status %v", grabStatus(kbReply.Status))
}
return nil
}