/*

 * Copyright (C) 2009 Apple Inc. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1.  Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer.

 * 2.  Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY

 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON

 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "config.h"

#include "WebKitDLL.h"

#include "WebScriptWorld.h"

#include <JavaScriptCore/APICast.h>

#include <WebCore/JSDOMBinding.h>

#include <WebCore/ScriptController.h>

using namespace WebCore;

typedef HashMap<DOMWrapperWorld*, WebScriptWorld*> WorldMap;

static WorldMap& allWorlds()

{

    static WorldMap& map = *new WorldMap;

    return map;

}

inline WebScriptWorld::WebScriptWorld(PassRefPtr<DOMWrapperWorld> world)

    : m_refCount(0)

    , m_world(world)

{

    ASSERT_ARG(world, m_world);

    ASSERT_ARG(world, !allWorlds().contains(m_world.get()));

    allWorlds().add(m_world.get(), this);

    ++gClassCount;

    gClassNameCount.add("WebScriptWorld");

}

WebScriptWorld::~WebScriptWorld()

{

    ASSERT(allWorlds().contains(m_world.get()));

    allWorlds().remove(m_world.get());

    --gClassCount;

    gClassNameCount.remove("WebScriptWorld");

}

WebScriptWorld* WebScriptWorld::standardWorld()

{

    static WebScriptWorld* standardWorld = createInstance(mainThreadNormalWorld()).releaseRef();

    return standardWorld;

}

COMPtr<WebScriptWorld> WebScriptWorld::createInstance()

{

    return createInstance(ScriptController::createWorld());

}

COMPtr<WebScriptWorld> WebScriptWorld::createInstance(PassRefPtr<DOMWrapperWorld> world)

{

    return new WebScriptWorld(world);

}

COMPtr<WebScriptWorld> WebScriptWorld::findOrCreateWorld(DOMWrapperWorld* world)

{

    if (world == mainThreadNormalWorld())

        return standardWorld();

    if (WebScriptWorld* existingWorld = allWorlds().get(world))

        return existingWorld;

    return createInstance(world);

}

ULONG WebScriptWorld::AddRef()

{

    return ++m_refCount;

}

ULONG WebScriptWorld::Release()

{

    ULONG newRefCount = --m_refCount;

    if (!newRefCount)

        delete this;

    return newRefCount;

}

HRESULT WebScriptWorld::QueryInterface(REFIID riid, void** ppvObject)

{

    if (!ppvObject)

        return E_POINTER;

    *ppvObject = 0;

    if (IsEqualIID(riid, __uuidof(WebScriptWorld)))

        *ppvObject = this;

    else if (IsEqualIID(riid, __uuidof(IWebScriptWorld)))

        *ppvObject = static_cast<IWebScriptWorld*>(this);

    else if (IsEqualIID(riid, IID_IUnknown))

        *ppvObject = static_cast<IUnknown*>(this);

    else

        return E_NOINTERFACE;

    AddRef();

    return S_OK;

}

HRESULT WebScriptWorld::standardWorld(IWebScriptWorld** outWorld)

{

    if (!outWorld)

        return E_POINTER;

    *outWorld = standardWorld();

    (*outWorld)->AddRef();

    return S_OK;

}

HRESULT WebScriptWorld::scriptWorldForGlobalContext(JSGlobalContextRef context, IWebScriptWorld** outWorld)

{

    if (!outWorld)

        return E_POINTER;

    return findOrCreateWorld(currentWorld(toJS(context))).copyRefTo(outWorld);

}

HRESULT WebScriptWorld::unregisterWorld()

{

    m_world->unregisterWorld();

    return S_OK;

}