/*

 * 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.

 */

#import "WebScriptWorld.h"

#import "WebScriptWorldInternal.h"

#import <WebCore/JSDOMBinding.h>

#import <WebCore/ScriptController.h>

#import <JavaScriptCore/APICast.h>

#import <wtf/RefPtr.h>

using namespace WebCore;

@interface WebScriptWorldPrivate : NSObject {

@public

    RefPtr<DOMWrapperWorld> world;

}

@end

@implementation WebScriptWorldPrivate

@end

typedef HashMap<DOMWrapperWorld*, WebScriptWorld*> WorldMap;

static WorldMap& allWorlds()

{

    static WorldMap& map = *new WorldMap;

    return map;

}

@implementation WebScriptWorld

- (id)initWithWorld:(PassRefPtr<DOMWrapperWorld>)world

{

    ASSERT_ARG(world, world);

    if (!world)

        return nil;

    self = [super init];

    if (!self)

        return nil;

    _private = [[WebScriptWorldPrivate alloc] init];

    _private->world = world;

    ASSERT_ARG(world, !allWorlds().contains(_private->world.get()));

    allWorlds().add(_private->world.get(), self);

    return self;

}

- (id)init

{

    return [self initWithWorld:ScriptController::createWorld()];

}

- (void)unregisterWorld

{

    _private->world->unregisterWorld();

}

- (void)dealloc

{

    ASSERT(allWorlds().contains(_private->world.get()));

    allWorlds().remove(_private->world.get());

    [_private release];

    _private = nil;

    [super dealloc];

}

+ (WebScriptWorld *)standardWorld

{

    static WebScriptWorld *world = [[WebScriptWorld alloc] initWithWorld:mainThreadNormalWorld()];

    return world;

}

+ (WebScriptWorld *)world

{

    return [[[self alloc] init] autorelease];

}

+ (WebScriptWorld *)scriptWorldForGlobalContext:(JSGlobalContextRef)context

{

    return [self findOrCreateWorld:currentWorld(toJS(context))];

}

@end

@implementation WebScriptWorld (WebInternal)

DOMWrapperWorld* core(WebScriptWorld *world)

{

    return world ? world->_private->world.get() : 0;

}

+ (WebScriptWorld *)findOrCreateWorld:(DOMWrapperWorld*) world

{

    ASSERT_ARG(world, world);

    if (world == mainThreadNormalWorld())

        return [self standardWorld];

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

        return existingWorld;

    return [[[self alloc] initWithWorld:world] autorelease];

}

@end