func (engine *Engine) AddMessageListener(callback MessageCallback) int64 {
listener := &MessageListener{
Id: engine.messageListenerId,
Callback: callback,
}
engine.messageListenerId += 1
needAppend := true
for i, listener := range engine.messageListeners {
if listener == nil {
engine.messageListeners[i] = listener
needAppend = false
break
}
}
if needAppend {
engine.messageListeners = append(engine.messageListeners, listener)
}
engine.messageListenerNum += 1
if engine.messageListenerNum == 1 {
C.V8_EnableMessageListener(engine.self, unsafe.Pointer(engine), 1)
}
return listener.Id
}
func (engine *Engine) RemoveMessageListener(id int64) {
for i, listener := range engine.messageListeners {
if listener != nil && listener.Id == id {
engine.messageListeners[i] = nil
engine.messageListenerNum -= 1
break
}
}
if engine.messageListenerNum == 0 {
C.V8_EnableMessageListener(engine.self, unsafe.Pointer(engine), 0)
}
}
func (engine *Engine) AddMessageListener(callback MessageCallback) int64 {
listener := &messageListener{
Id: engine.messageListenerId,
Callback: callback,
}
if engine.lastMessageListener == nil {
engine.firstMessageListener = listener
engine.lastMessageListener = listener
C.V8_EnableMessageListener(engine.self, unsafe.Pointer(engine), 1)
} else {
engine.lastMessageListener.Next = listener
engine.lastMessageListener = listener
}
return listener.Id
}
func (engine *Engine) RemoveMessageListener(id int64) {
var p *messageListener
for i := engine.firstMessageListener; i != nil; p, i = i, i.Next {
if i.Id == id {
if p == nil {
engine.firstMessageListener = i.Next
} else {
p.Next = i.Next
}
if i == engine.lastMessageListener {
engine.lastMessageListener = p
}
break
}
}
if engine.firstMessageListener == nil {
C.V8_EnableMessageListener(engine.self, unsafe.Pointer(engine), 0)
}
}