1/*
2 *  Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
3 *  Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Apple Inc. All rights reserved.
4 *  Copyright (C) 2007 Samuel Weinig <sam@webkit.org>
5 *  Copyright (C) 2009 Google, Inc. All rights reserved.
6 *
7 *  This library is free software; you can redistribute it and/or
8 *  modify it under the terms of the GNU Lesser General Public
9 *  License as published by the Free Software Foundation; either
10 *  version 2 of the License, or (at your option) any later version.
11 *
12 *  This library is distributed in the hope that it will be useful,
13 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
14 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 *  Lesser General Public License for more details.
16 *
17 *  You should have received a copy of the GNU Lesser General Public
18 *  License along with this library; if not, write to the Free Software
19 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
20 */
21
22#ifndef DOMWrapperWorld_h
23#define DOMWrapperWorld_h
24
25#include "JSDOMGlobalObject.h"
26#include <runtime/WeakGCMap.h>
27#include <wtf/Forward.h>
28
29namespace WebCore {
30
31class CSSValue;
32class JSDOMWrapper;
33class ScriptController;
34
35typedef HashMap<void*, JSC::Weak<JSDOMWrapper> > DOMObjectWrapperMap;
36typedef JSC::WeakGCMap<StringImpl*, JSC::JSString, PtrHash<StringImpl*> > JSStringCache;
37
38class DOMWrapperWorld : public RefCounted<DOMWrapperWorld> {
39public:
40    static PassRefPtr<DOMWrapperWorld> create(JSC::VM* vm, bool isNormal = false)
41    {
42        return adoptRef(new DOMWrapperWorld(vm, isNormal));
43    }
44    ~DOMWrapperWorld();
45
46    // Free as much memory held onto by this world as possible.
47    void clearWrappers();
48
49    void didCreateWindowShell(ScriptController* scriptController) { m_scriptControllersWithWindowShells.add(scriptController); }
50    void didDestroyWindowShell(ScriptController* scriptController) { m_scriptControllersWithWindowShells.remove(scriptController); }
51
52    // FIXME: can we make this private?
53    DOMObjectWrapperMap m_wrappers;
54    JSStringCache m_stringCache;
55    HashMap<CSSValue*, void*> m_cssValueRoots;
56
57    bool isNormal() const { return m_isNormal; }
58
59    JSC::VM* vm() const { return m_vm; }
60
61protected:
62    DOMWrapperWorld(JSC::VM*, bool isNormal);
63
64private:
65    JSC::VM* m_vm;
66    HashSet<ScriptController*> m_scriptControllersWithWindowShells;
67    bool m_isNormal;
68};
69
70DOMWrapperWorld* normalWorld(JSC::VM&);
71DOMWrapperWorld* mainThreadNormalWorld();
72inline DOMWrapperWorld* debuggerWorld() { return mainThreadNormalWorld(); }
73inline DOMWrapperWorld* pluginWorld() { return mainThreadNormalWorld(); }
74
75inline DOMWrapperWorld* currentWorld(JSC::ExecState* exec)
76{
77    return JSC::jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->world();
78}
79
80} // namespace WebCore
81
82#endif // DOMWrapperWorld_h
83