Method UnhookEvent

core/EventManager.cpp:262–325

}

EventHookError EventManager::UnhookEvent(const char *name, IPluginFunction *pFunction, EventHookMode mode)
{
	EventHook *pHook;
	IChangeableForward **pEventForward;

	/* If hook does not exist at all */
	if (!m_EventHooks.retrieve(name, &pHook))
	{
		return EventHookErr_NotActive;
	}

	/* One forward to rule them all */
	if (mode == EventHookMode_Pre)
	{
		pEventForward = &pHook->pPreHook;
	} else {
		pEventForward = &pHook->pPostHook;
	}

	/* Remove function from forward's list */
	if (*pEventForward == NULL || !(*pEventForward)->RemoveFunction(pFunction))
	{
		return EventHookErr_InvalidCallback;
	}

	/* If forward's list contains 0 functions now, free it */
	if ((*pEventForward)->GetFunctionCount() == 0)
	{
		forwardsys->ReleaseForward(*pEventForward);
		*pEventForward = NULL;
	}

	/* Decrement reference count */
	if (--pHook->refCount == 0)
	{
		/* If reference count is now 0, free hook structure */

		EventHookList *pHookList;
		IPlugin *plugin = scripts->FindPluginByContext(pFunction->GetParentContext());

		/* Get plugin's event hook list */
		if (!plugin->GetProperty("EventHooks", (void**)&pHookList))
		{
			return EventHookErr_NotActive;
		}

		/* Make sure the event was actually being hooked */
		if (pHookList->find(pHook) == pHookList->end())
		{
			return EventHookErr_NotActive;
		}

		/* Remove current structure from plugin's list */
		pHookList->remove(pHook);

		/* Delete entry in trie */
		m_EventHooks.remove(name);