void CComponentManager::Script_RegisterComponentType(void* cbdata, int iid, std::string cname, CScriptVal ctor)
{
CComponentManager* componentManager = static_cast<CComponentManager*> (cbdata);
// Find the C++ component that wraps the interface
int cidWrapper = componentManager->GetScriptWrapper(iid);
if (cidWrapper == CID__Invalid)
{
componentManager->m_ScriptInterface.ReportError("Invalid interface id");
return;
}
const ComponentType& ctWrapper = componentManager->m_ComponentTypesById[cidWrapper];
bool mustReloadComponents = false; // for hotloading
ComponentTypeId cid = componentManager->LookupCID(cname);
if (cid == CID__Invalid)
{
// Allocate a new cid number
cid = componentManager->m_NextScriptComponentTypeId++;
componentManager->m_ComponentTypeIdsByName[cname] = cid;
}
else
{
// Component type is already loaded, so do hotloading:
if (!componentManager->m_CurrentlyHotloading)
{
componentManager->m_ScriptInterface.ReportError("Registering component type with already-registered name"); // TODO: report the actual name
return;
}
const ComponentType& ctPrevious = componentManager->m_ComponentTypesById[cid];
// We can only replace scripted component types, not native ones
if (ctPrevious.type != CT_Script)
{
componentManager->m_ScriptInterface.ReportError("Hotloading script component type with same name as native component");
return;
}
// We don't support changing the IID of a component type (it would require fiddling
// around with m_ComponentsByInterface and being careful to guarantee uniqueness per entity)
if (ctPrevious.iid != iid)
{
// ...though it only matters if any components exist with this type
if (!componentManager->m_ComponentsByTypeId[cid].empty())
{
componentManager->m_ScriptInterface.ReportError("Hotloading script component type mustn't change interface ID");
return;
}
}
// Remove the old component type's message subscriptions
std::map<MessageTypeId, std::vector<ComponentTypeId> >::iterator it;
for (it = componentManager->m_LocalMessageSubscriptions.begin(); it != componentManager->m_LocalMessageSubscriptions.end(); ++it)
{
std::vector<ComponentTypeId>& types = it->second;
std::vector<ComponentTypeId>::iterator ctit = find(types.begin(), types.end(), cid);
if (ctit != types.end())
types.erase(ctit);
}
for (it = componentManager->m_GlobalMessageSubscriptions.begin(); it != componentManager->m_GlobalMessageSubscriptions.end(); ++it)
{
std::vector<ComponentTypeId>& types = it->second;
std::vector<ComponentTypeId>::iterator ctit = find(types.begin(), types.end(), cid);
if (ctit != types.end())
types.erase(ctit);
}
mustReloadComponents = true;
}
std::string schema = "<empty/>";
{
CScriptValRooted prototype;
if (componentManager->m_ScriptInterface.GetProperty(ctor.get(), "prototype", prototype) &&
componentManager->m_ScriptInterface.HasProperty(prototype.get(), "Schema"))
{
componentManager->m_ScriptInterface.GetProperty(prototype.get(), "Schema", schema);
}
}
// Construct a new ComponentType, using the wrapper's alloc functions
ComponentType ct = {
CT_Script,
iid,
ctWrapper.alloc,
ctWrapper.dealloc,
cname,
schema,
CScriptValRooted(componentManager->m_ScriptInterface.GetContext(), ctor)
};
componentManager->m_ComponentTypesById[cid] = ct;
componentManager->m_CurrentComponent = cid; // needed by Subscribe
// Find all the ctor prototype's On* methods, and subscribe to the appropriate messages:
CScriptVal proto;
if (!componentManager->m_ScriptInterface.GetProperty(ctor.get(), "prototype", proto))
return; // error
std::vector<std::string> methods;
if (!componentManager->m_ScriptInterface.EnumeratePropertyNamesWithPrefix(proto.get(), "On", methods))
return; // error
for (std::vector<std::string>::const_iterator it = methods.begin(); it != methods.end(); ++it)
{
std::string name = (*it).substr(2); // strip the "On" prefix
// Handle "OnGlobalFoo" functions specially
bool isGlobal = false;
if (name.substr(0, 6) == "Global")
{
isGlobal = true;
name = name.substr(6);
}
std::map<std::string, MessageTypeId>::const_iterator mit = componentManager->m_MessageTypeIdsByName.find(name);
if (mit == componentManager->m_MessageTypeIdsByName.end())
{
std::string msg = "Registered component has unrecognised '" + *it + "' message handler method";
componentManager->m_ScriptInterface.ReportError(msg.c_str());
return;
}
if (isGlobal)
componentManager->SubscribeGloballyToMessageType(mit->second);
else
componentManager->SubscribeToMessageType(mit->second);
}
componentManager->m_CurrentComponent = CID__Invalid;
if (mustReloadComponents)
{
// For every script component with this cid, we need to switch its
// prototype from the old constructor's prototype property to the new one's
const std::map<entity_id_t, IComponent*>& comps = componentManager->m_ComponentsByTypeId[cid];
std::map<entity_id_t, IComponent*>::const_iterator eit = comps.begin();
for (; eit != comps.end(); ++eit)
{
jsval instance = eit->second->GetJSInstance();
if (!JSVAL_IS_NULL(instance))
componentManager->m_ScriptInterface.SetPrototype(instance, proto.get());
}
}
}
void CComponentManager::Script_RegisterComponentType_Common(ScriptInterface::CxPrivate* pCxPrivate, int iid, const std::string& cname, JS::HandleValue ctor, bool reRegister, bool systemComponent)
{
CComponentManager* componentManager = static_cast<CComponentManager*> (pCxPrivate->pCBData);
JSContext* cx = componentManager->m_ScriptInterface.GetContext();
JSAutoRequest rq(cx);
// Find the C++ component that wraps the interface
int cidWrapper = componentManager->GetScriptWrapper(iid);
if (cidWrapper == CID__Invalid)
{
componentManager->m_ScriptInterface.ReportError("Invalid interface id");
return;
}
const ComponentType& ctWrapper = componentManager->m_ComponentTypesById[cidWrapper];
bool mustReloadComponents = false; // for hotloading
ComponentTypeId cid = componentManager->LookupCID(cname);
if (cid == CID__Invalid)
{
if (reRegister)
{
std::string msg("ReRegistering component type that was not registered before '"+cname+"'");
componentManager->m_ScriptInterface.ReportError(msg.c_str());
return;
}
// Allocate a new cid number
cid = componentManager->m_NextScriptComponentTypeId++;
componentManager->m_ComponentTypeIdsByName[cname] = cid;
if (systemComponent)
componentManager->MarkScriptedComponentForSystemEntity(cid);
}
else
{
// Component type is already loaded, so do hotloading:
if (!componentManager->m_CurrentlyHotloading && !reRegister)
{
std::string msg("Registering component type with already-registered name '"+cname+"'");
componentManager->m_ScriptInterface.ReportError(msg.c_str());
return;
}
const ComponentType& ctPrevious = componentManager->m_ComponentTypesById[cid];
// We can only replace scripted component types, not native ones
if (ctPrevious.type != CT_Script)
{
std::string msg("Loading script component type with same name '"+cname+"' as native component");
componentManager->m_ScriptInterface.ReportError(msg.c_str());
return;
}
// We don't support changing the IID of a component type (it would require fiddling
// around with m_ComponentsByInterface and being careful to guarantee uniqueness per entity)
if (ctPrevious.iid != iid)
{
// ...though it only matters if any components exist with this type
if (!componentManager->m_ComponentsByTypeId[cid].empty())
{
componentManager->m_ScriptInterface.ReportError("Hotloading script component type mustn't change interface ID");
return;
}
}
// Remove the old component type's message subscriptions
std::map<MessageTypeId, std::vector<ComponentTypeId> >::iterator it;
for (it = componentManager->m_LocalMessageSubscriptions.begin(); it != componentManager->m_LocalMessageSubscriptions.end(); ++it)
{
std::vector<ComponentTypeId>& types = it->second;
std::vector<ComponentTypeId>::iterator ctit = find(types.begin(), types.end(), cid);
if (ctit != types.end())
types.erase(ctit);
}
for (it = componentManager->m_GlobalMessageSubscriptions.begin(); it != componentManager->m_GlobalMessageSubscriptions.end(); ++it)
{
std::vector<ComponentTypeId>& types = it->second;
std::vector<ComponentTypeId>::iterator ctit = find(types.begin(), types.end(), cid);
if (ctit != types.end())
types.erase(ctit);
}
mustReloadComponents = true;
}
std::string schema = "<empty/>";
{
JS::RootedValue prototype(cx);
if (componentManager->m_ScriptInterface.GetProperty(ctor, "prototype", &prototype) &&
componentManager->m_ScriptInterface.HasProperty(prototype, "Schema"))
{
componentManager->m_ScriptInterface.GetProperty(prototype, "Schema", schema);
}
}
// Construct a new ComponentType, using the wrapper's alloc functions
ComponentType ct(
CT_Script,
iid,
ctWrapper.alloc,
ctWrapper.dealloc,
cname,
schema,
DefPersistentRooted<JS::Value>(cx, ctor)
);
componentManager->m_ComponentTypesById[cid] = std::move(ct);
componentManager->m_CurrentComponent = cid; // needed by Subscribe
// Find all the ctor prototype's On* methods, and subscribe to the appropriate messages:
JS::RootedValue protoVal(cx);
if (!componentManager->m_ScriptInterface.GetProperty(ctor, "prototype", &protoVal))
return; // error
std::vector<std::string> methods;
JS::RootedObject proto(cx);
if (!protoVal.isObjectOrNull())
return; // error
proto = protoVal.toObjectOrNull();
if (!componentManager->m_ScriptInterface.EnumeratePropertyNamesWithPrefix(protoVal, "On", methods))
return; // error
for (std::vector<std::string>::const_iterator it = methods.begin(); it != methods.end(); ++it)
{
std::string name = (*it).substr(2); // strip the "On" prefix
// Handle "OnGlobalFoo" functions specially
bool isGlobal = false;
if (name.substr(0, 6) == "Global")
{
isGlobal = true;
name = name.substr(6);
}
std::map<std::string, MessageTypeId>::const_iterator mit = componentManager->m_MessageTypeIdsByName.find(name);
if (mit == componentManager->m_MessageTypeIdsByName.end())
{
std::string msg("Registered component has unrecognised '" + *it + "' message handler method");
componentManager->m_ScriptInterface.ReportError(msg.c_str());
return;
}
if (isGlobal)
componentManager->SubscribeGloballyToMessageType(mit->second);
else
componentManager->SubscribeToMessageType(mit->second);
}
componentManager->m_CurrentComponent = CID__Invalid;
if (mustReloadComponents)
{
// For every script component with this cid, we need to switch its
// prototype from the old constructor's prototype property to the new one's
const std::map<entity_id_t, IComponent*>& comps = componentManager->m_ComponentsByTypeId[cid];
std::map<entity_id_t, IComponent*>::const_iterator eit = comps.begin();
for (; eit != comps.end(); ++eit)
{
JS::RootedValue instance(cx, eit->second->GetJSInstance());
if (!instance.isNull())
{
componentManager->m_ScriptInterface.SetPrototype(instance, protoVal);
}
}
}
}