Method HookEvent

core/EventManager.cpp:168–260

#endif

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

	/* If we aren't listening to this event... */
	if (!gameevents->FindListener(this, name))
	{
		/* Then add ourselves */
		if (!gameevents->AddListener(this, name, true))
		{
			/* If event doesn't exist... */
			return EventHookErr_InvalidEvent;
		}
	}

	/* If a hook structure does not exist... */
	if (!m_EventHooks.retrieve(name, &pHook))
	{
		EventHookList *pHookList;
		IPlugin *plugin = scripts->FindPluginByContext(pFunction->GetParentContext());

		/* Check plugin for an existing EventHook list */
		if (!plugin->GetProperty("EventHooks", (void **)&pHookList))
		{
			pHookList = new EventHookList();
			plugin->SetProperty("EventHooks", pHookList);
		}

		/* Create new GameEventHook structure */
		pHook = new EventHook();

		if (mode == EventHookMode_Pre)
		{
			/* Create forward for a pre hook */
			pHook->pPreHook = forwardsys->CreateForwardEx(NULL, ET_Hook, 3, GAMEEVENT_PARAMS);
			/* Add to forward list */
			pHook->pPreHook->AddFunction(pFunction);
		} else {
			/* Create forward for a post hook */
			pHook->pPostHook = forwardsys->CreateForwardEx(NULL, ET_Ignore, 3, GAMEEVENT_PARAMS);
			/* Should we copy data from a pre hook to the post hook? */
			pHook->postCopy = (mode == EventHookMode_Post);
			/* Add to forward list */
			pHook->pPostHook->AddFunction(pFunction);
		}

		/* Cache the name for post hooks */
		pHook->name = name;

		/* Increase reference count */
		pHook->refCount++;

		/* Add hook structure to hook lists */
		pHookList->push_back(pHook);
		m_EventHooks.insert(name, pHook);

		return EventHookErr_Okay;
	}