formula-engine/FormulaEngine/Scriptable.cpp at master · apoch/formula-engine · GitHub

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#include "Pch.h"

#include "Interfaces.h"
#include "Formula.h"
#include "Actions.h"
#include "TokenPool.h"
#include "PropertyBag.h"
#include "EventHandler.h"
#include "Scriptable.h"

#include "EngineBind.h"


Scriptable::Scriptable(Scriptable && other)
	: m_scopes(std::move(other.m_scopes)),
	  m_listMemberships(std::move(other.m_listMemberships)),
	  m_bindings(std::move(other.m_bindings))
{
	m_eventHandlers = other.m_eventHandlers;
	other.m_eventHandlers = nullptr;
}

Scriptable::~Scriptable() {
	for(auto & membership : m_listMemberships)
		membership.owner->ListRemoveEntry(membership.token, *this);

	for(auto & pair : m_bindings)
		delete pair.second;

	if(m_eventHandlers)
		m_eventHandlers->DecRef();
}


void Scriptable::AddBinding(unsigned bindingToken) {
	assert(m_bindings.find(bindingToken) == m_bindings.end());

	m_bindings[bindingToken] = nullptr;
}


void Scriptable::BindAll(IEngineBinder * binder, ScriptWorld * world) {
	for(auto & pair : m_bindings) {
		if(pair.second == nullptr) {
			pair.second = binder->CreateBinding(this, world, pair.first);
		}
	}
}

IEngineBinding * Scriptable::GetBinding(unsigned token) {
	auto iter = m_bindings.find(token);
	if(iter == m_bindings.end())
		return nullptr;

	return iter->second;
}

const IEngineBinding * Scriptable::GetBinding(unsigned token) const {
	auto iter = m_bindings.find(token);
	if(iter == m_bindings.end())
		return nullptr;

	return iter->second;
}


Scriptable * Scriptable::Instantiate() const {
	Scriptable * clone = new Scriptable;
	clone->m_eventHandlers = m_eventHandlers;
	clone->m_scopes.InstantiateFrom(m_scopes);
	clone->m_bindings = m_bindings;

	if(m_eventHandlers)
		m_eventHandlers->IncRef();

	BindingPropertyBag bag(clone);
	clone->m_scopes.SetBindings(bag);

	return clone;
}


void Scriptable::OnListMembershipAdded(unsigned listToken, IListContainer * owner) const {
	Membership membership;
	membership.owner = owner;
	membership.token = listToken;
	m_listMemberships.push_back(membership);
}

void Scriptable::OnListMembershipRemoved(unsigned listToken, IListContainer * owner) const {
	for(auto iter = m_listMemberships.begin(); iter != m_listMemberships.end(); ) {
		if(iter->owner == owner && iter->token == listToken)
			iter = m_listMemberships.erase(iter);
		else
			++iter;
	}
}


Result Scriptable::ResolveBinding(const IFormulaContext & context, unsigned scope, unsigned token) const {
	ref(context);

	const IEngineBinding * binding = nullptr;

	if(scope) {
		binding = GetBinding(scope);
	}
	else {
		for(auto iter : m_bindings) {
			if(iter.second->HasPropertyBinding(token)) {
				binding = iter.second;
				break;
			}
		}
	}

	Result ret;

	if (!binding) {
		ret.code = RESULT_CODE_MISSING_DEFINITION;
		return ret;
	}

	ret.code = RESULT_CODE_OK;

	unsigned arity = binding->GetPropertyBinding(token, &ret.payload.txt.token);
	if (arity == 1) {
		ret.type = RESULT_TYPE_TOKEN;
		return ret;
	}

	arity = binding->GetPropertyBinding(token, &ret.payload.num.value, &ret.payload.num.value2);
	if(arity == 0)
		ret.code = RESULT_CODE_MISSING_DEFINITION;
	else if(arity == 1)
		ret.type = RESULT_TYPE_SCALAR;
	else if(arity == 2)
		ret.type = RESULT_TYPE_VECTOR2;
	else
		ret.code = RESULT_CODE_TYPE_ERROR;

	return ret;
}