/*

 * Copyright (C) 2010 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 "NPJSObjectMap.h"

#include "NPRuntimeUtilities.h"

#include "PluginView.h"

#include <WebCore/Frame.h>

#include <WebCore/IdentifierRep.h>

#include <JavaScriptCore/JSObject.h>

#include <JavaScriptCore/Protect.h>

#include <WebKit/npruntime.h>

#include <wtf/Noncopyable.h>

using namespace JSC;

using namespace WebCore;

namespace WebKit {

class NPJSObject : public NPObject, Noncopyable {

public:

    static NPJSObject* create(NPJSObjectMap* objectMap, JSObject* jsObject);

private:

    NPJSObject()

        : m_objectMap(0)

    {

    }

    ~NPJSObject()

    {

        // Remove ourselves from the map.

        ASSERT(m_objectMap->m_objects.contains(m_jsObject.get()));

        m_objectMap->m_objects.remove(m_jsObject.get());

    }

    static bool isNPJSObject(NPObject*);

    static NPJSObject* toNPJSObject(NPObject* npObject)

    {

        ASSERT(isNPJSObject(npObject));

        return static_cast<NPJSObject*>(npObject);

    }

    void initialize(NPJSObjectMap*, JSObject* jsObject);

    bool hasProperty(NPIdentifier);

    bool getProperty(NPIdentifier, NPVariant* result);

    static NPClass* npClass();

    static NPObject* NP_Allocate(NPP, NPClass*);

    static void NP_Deallocate(NPObject*);

    static bool NP_HasProperty(NPObject* npobj, NPIdentifier name);

    static bool NP_GetProperty(NPObject* npobj, NPIdentifier name, NPVariant* result);

    NPJSObjectMap* m_objectMap;

    ProtectedPtr<JSObject> m_jsObject;

};

NPJSObject* NPJSObject::create(NPJSObjectMap* objectMap, JSObject* jsObject)

{

    NPJSObject* npJSObject = toNPJSObject(createNPObject(0, npClass()));

    npJSObject->initialize(objectMap, jsObject);

    return npJSObject;

}

bool NPJSObject::isNPJSObject(NPObject* npObject)

{

    return npObject->_class == npClass();

}

void NPJSObject::initialize(NPJSObjectMap* objectMap, JSObject* jsObject)

{

    ASSERT(!m_objectMap);

    ASSERT(!m_jsObject);

    m_objectMap = objectMap;

    m_jsObject = jsObject;

}

static Identifier identifierFromIdentifierRep(ExecState* exec, IdentifierRep* identifierRep)

{

    ASSERT(identifierRep->isString());

    const char* string = identifierRep->string();

    int length = strlen(string);

    return Identifier(exec, String::fromUTF8WithLatin1Fallback(string, length).impl());

}

bool NPJSObject::hasProperty(NPIdentifier identifier)

{

    IdentifierRep* identifierRep = static_cast<IdentifierRep*>(identifier);

    Frame* frame = m_objectMap->m_pluginView->frame();

    if (!frame)

        return false;

    bool result;

    ExecState* exec = frame->script()->globalObject(pluginWorld())->globalExec();

    if (identifierRep->isString())

        result = m_jsObject->hasProperty(exec, identifierFromIdentifierRep(exec, identifierRep));

    else

        result = m_jsObject->hasProperty(exec, identifierRep->number());

    exec->clearException();

    return result;

}

bool NPJSObject::getProperty(NPIdentifier identifier, NPVariant* result)

{

    // FIXME: Implement.

    return false;

}

NPClass* NPJSObject::npClass()

{

    static NPClass npClass = {

        NP_CLASS_STRUCT_VERSION,

        NP_Allocate,

        NP_Deallocate,

        0, 

        0,

        0,

        0,

        NP_HasProperty,

        NP_GetProperty,

        0,

        0,

        0,

        0

    };

    return &npClass;

}

NPObject* NPJSObject::NP_Allocate(NPP npp, NPClass* npClass)

{

    ASSERT_UNUSED(npp, !npp);

    return new NPJSObject;

}

void NPJSObject::NP_Deallocate(NPObject* npObject)

{

    NPJSObject* npJSObject = toNPJSObject(npObject);

    delete npJSObject;

}

bool NPJSObject::NP_HasProperty(NPObject* npObject, NPIdentifier propertyName)

{

    return toNPJSObject(npObject)->hasProperty(propertyName);

}

bool NPJSObject::NP_GetProperty(NPObject* npObject, NPIdentifier propertyName, NPVariant* result)

{

    return toNPJSObject(npObject)->getProperty(propertyName, result);

}

NPJSObjectMap::NPJSObjectMap(PluginView* pluginView)

    : m_pluginView(pluginView)

{

}

NPObject* NPJSObjectMap::getOrCreateObject(JSObject* jsObject)

{

    // First, check if we already know about this object.

    if (NPJSObject* npJSObject = m_objects.get(jsObject)) {

        retainNPObject(npJSObject);

        return npJSObject;

    }

    NPJSObject* npJSObject = NPJSObject::create(this, jsObject);

    m_objects.set(jsObject, npJSObject);

    return npJSObject;

}

void NPJSObjectMap::invalidate()

{

    Vector<NPJSObject*> npJSObjects;

    copyValuesToVector(m_objects, npJSObjects);

    // Deallocate all the object wrappers so we won't leak any JavaScript objects.

    for (size_t i = 0; i < npJSObjects.size(); ++i)

        deallocateNPObject(npJSObjects[i]);

    // We shouldn't have any objects left now.

    ASSERT(m_objects.isEmpty());

}

} // namespace WebKit