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1/*
2 * Copyright (C) 2009 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1.  Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2.  Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#import "WebScriptWorld.h"
26
27#import "WebScriptWorldInternal.h"
28#import <WebCore/JSDOMBinding.h>
29#import <WebCore/ScriptController.h>
30#import <JavaScriptCore/APICast.h>
31
32#import <wtf/RefPtr.h>
33
34using namespace WebCore;
35
36@interface WebScriptWorldPrivate : NSObject {
37@public
38    RefPtr<DOMWrapperWorld> world;
39}
40@end
41
42@implementation WebScriptWorldPrivate
43@end
44
45typedef HashMap<DOMWrapperWorld*, WebScriptWorld*> WorldMap;
46static WorldMap& allWorlds()
47{
48    static WorldMap& map = *new WorldMap;
49    return map;
50}
51
52@implementation WebScriptWorld
53
54- (id)initWithWorld:(PassRefPtr<DOMWrapperWorld>)world
55{
56    ASSERT_ARG(world, world);
57    if (!world)
58        return nil;
59
60    self = [super init];
61    if (!self)
62        return nil;
63
64    _private = [[WebScriptWorldPrivate alloc] init];
65    _private->world = world;
66
67    ASSERT_ARG(world, !allWorlds().contains(_private->world.get()));
68    allWorlds().add(_private->world.get(), self);
69
70    return self;
71}
72
73- (id)init
74{
75    return [self initWithWorld:ScriptController::createWorld()];
76}
77
78- (void)unregisterWorld
79{
80    _private->world->clearWrappers();
81}
82
83- (void)dealloc
84{
85    ASSERT(allWorlds().contains(_private->world.get()));
86    allWorlds().remove(_private->world.get());
87
88    [_private release];
89    _private = nil;
90    [super dealloc];
91}
92
93+ (WebScriptWorld *)standardWorld
94{
95    static WebScriptWorld *world = [[WebScriptWorld alloc] initWithWorld:mainThreadNormalWorld()];
96    return world;
97}
98
99+ (WebScriptWorld *)world
100{
101    return [[[self alloc] init] autorelease];
102}
103
104+ (WebScriptWorld *)scriptWorldForGlobalContext:(JSGlobalContextRef)context
105{
106    return [self findOrCreateWorld:currentWorld(toJS(context))];
107}
108
109@end
110
111@implementation WebScriptWorld (WebInternal)
112
113DOMWrapperWorld* core(WebScriptWorld *world)
114{
115    return world ? world->_private->world.get() : 0;
116}
117
118+ (WebScriptWorld *)findOrCreateWorld:(DOMWrapperWorld*) world
119{
120    ASSERT_ARG(world, world);
121
122    if (world == mainThreadNormalWorld())
123        return [self standardWorld];
124
125    if (WebScriptWorld *existingWorld = allWorlds().get(world))
126        return existingWorld;
127
128    return [[[self alloc] initWithWorld:world] autorelease];
129}
130
131@end
132