axmol/cocos/scripting/js-bindings/manual/component/CCComponentJS.cpp

/****************************************************************************
 Copyright (c) 2015 Chukong Technologies Inc.
 
 http://www.cocos2d-x.org
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
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 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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 ****************************************************************************/

#include "jsapi.h"
#include "mozilla/Maybe.h"
#include "CCComponentJS.h"
#include "base/CCScriptSupport.h"
#include "ScriptingCore.h"
#include "cocos2d_specifics.hpp"
#include "js_manual_conversions.h"

NS_CC_BEGIN

const std::string ComponentJS::ON_ENTER = "onEnter";
const std::string ComponentJS::ON_EXIT = "onExit";
const std::string ComponentJS::UPDATE = "update";

ComponentJS* ComponentJS::create(const std::string& scriptFileName)
{
    CC_ASSERT(!scriptFileName.empty());
    
    auto componentJS = new(std::nothrow) ComponentJS(scriptFileName);
    if (componentJS)
    {
        componentJS->autorelease();
    }
    
    return componentJS;
}

ComponentJS::ComponentJS(const std::string& scriptFileName)
: _scriptFileName(scriptFileName)
, _jsObj(nullptr)
{
    ScriptingCore* engine = ScriptingCore::getInstance();
    JSContext* cx = engine->getGlobalContext();
    // Require script
    JS::RootedValue classValue(cx);
    _succeedLoadingScript = engine->requireScript(_scriptFileName.c_str(), &classValue);
    
    if (_succeedLoadingScript)
    {
        JS::RootedObject classObj(cx, classValue.toObjectOrNull());
        const JSClass* theClass = JS_GetClass(classObj);
        JS::RootedValue protoValue(cx);
        JS_GetProperty(cx, classObj, "prototype", &protoValue);
        
        mozilla::Maybe<JS::PersistentRootedObject> *jsObj = new mozilla::Maybe<JS::PersistentRootedObject>();
        
        js_type_class_t *typeClass = js_get_type_from_native<cocos2d::ComponentJS>(this);
        JS::RootedObject proto(cx, protoValue.toObjectOrNull());
        JS::RootedObject parent(cx, typeClass->proto.ref());
        jsObj->construct(cx);
        JS::RootedObject obj(cx, JS_NewObject(cx, theClass, proto, parent));
        jsObj->ref() = obj;
        
        // link the native object with the javascript object
        jsb_new_proxy(this, jsObj->ref());
        
        _jsObj = jsObj;
    }
}

ComponentJS::~ComponentJS()
{
    mozilla::Maybe<JS::PersistentRootedObject>* jsObj = static_cast<mozilla::Maybe<JS::PersistentRootedObject>*>(_jsObj);
    if (jsObj && !jsObj->empty())
    {
        // Remove proxy
        js_proxy_t* proxy = jsb_get_js_proxy(jsObj->ref());
        if (proxy)
            jsb_remove_proxy(proxy);
    }
    // Delete rooted object
    if (jsObj != nullptr)
    {
        delete jsObj;
    }
}

void* ComponentJS::getScriptObject() const
{
    mozilla::Maybe<JS::PersistentRootedObject>* jsObj = static_cast<mozilla::Maybe<JS::PersistentRootedObject>*>(_jsObj);
    if (jsObj && !jsObj->empty())
    {
        return jsObj->ref().get();
    }
    else
    {
        return nullptr;
    }
}

void ComponentJS::update(float delta)
{
    if (_succeedLoadingScript)
    {
        mozilla::Maybe<JS::PersistentRootedObject>* jsObj = static_cast<mozilla::Maybe<JS::PersistentRootedObject>*>(_jsObj);
        jsval dataVal = DOUBLE_TO_JSVAL(delta);
        JS::RootedValue retval(ScriptingCore::getInstance()->getGlobalContext());
        ScriptingCore::getInstance()->executeFunctionWithOwner(OBJECT_TO_JSVAL(jsObj->ref().get()), ComponentJS::UPDATE.c_str(), 1, &dataVal, &retval);
    }
}

void ComponentJS::onEnter()
{
    if (_succeedLoadingScript)
    {
        mozilla::Maybe<JS::PersistentRootedObject>* jsObj = static_cast<mozilla::Maybe<JS::PersistentRootedObject>*>(_jsObj);
        jsval dataVal = INT_TO_JSVAL(1);
        JS::RootedValue retval(ScriptingCore::getInstance()->getGlobalContext());
        ScriptingCore::getInstance()->executeFunctionWithOwner(OBJECT_TO_JSVAL(jsObj->ref().get()), ComponentJS::ON_ENTER.c_str(), 1, &dataVal, &retval);
    }
}

void ComponentJS::onExit()
{
    if (_succeedLoadingScript)
    {
        mozilla::Maybe<JS::PersistentRootedObject>* jsObj = static_cast<mozilla::Maybe<JS::PersistentRootedObject>*>(_jsObj);
        jsval dataVal = INT_TO_JSVAL(1);
        JS::RootedValue retval(ScriptingCore::getInstance()->getGlobalContext());
        ScriptingCore::getInstance()->executeFunctionWithOwner(OBJECT_TO_JSVAL(jsObj->ref().get()), ComponentJS::ON_EXIT.c_str(), 1, &dataVal, &retval);
    }
}

NS_CC_END