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 <heap/Weak.h>
27 #include <runtime/WeakGCMap.h>
28 #include <wtf/Forward.h>
29
30 namespace WebCore {
31
32 class CSSValue;
33 class JSDOMWrapper;
34 class ScriptController;
35
36 typedef HashMap<void*, JSC::Weak<JSDOMWrapper> > DOMObjectWrapperMap;
37 typedef HashMap<StringImpl*, JSC::Weak<JSC::JSString> > JSStringCache;
38
39 class JSDOMWrapperOwner : public JSC::WeakHandleOwner {
40 public:
41 JSDOMWrapperOwner(DOMWrapperWorld*);
42 virtual void finalize(JSC::Handle<JSC::Unknown>, void* context);
43
44 private:
45 DOMWrapperWorld* m_world;
46 };
47
JSDOMWrapperOwner(DOMWrapperWorld * world)48 inline JSDOMWrapperOwner::JSDOMWrapperOwner(DOMWrapperWorld* world)
49 : m_world(world)
50 {
51 }
52
53 class JSStringOwner : public JSC::WeakHandleOwner {
54 public:
55 JSStringOwner(DOMWrapperWorld*);
56 virtual void finalize(JSC::Handle<JSC::Unknown>, void* context);
57
58 private:
59 DOMWrapperWorld* m_world;
60 };
61
JSStringOwner(DOMWrapperWorld * world)62 inline JSStringOwner::JSStringOwner(DOMWrapperWorld* world)
63 : m_world(world)
64 {
65 }
66
67 class DOMWrapperWorld : public RefCounted<DOMWrapperWorld> {
68 public:
69 static PassRefPtr<DOMWrapperWorld> create(JSC::JSGlobalData* globalData, bool isNormal = false)
70 {
71 return adoptRef(new DOMWrapperWorld(globalData, isNormal));
72 }
73 ~DOMWrapperWorld();
74
75 // Free as much memory held onto by this world as possible.
76 void clearWrappers();
77
didCreateWindowShell(ScriptController * scriptController)78 void didCreateWindowShell(ScriptController* scriptController) { m_scriptControllersWithWindowShells.add(scriptController); }
didDestroyWindowShell(ScriptController * scriptController)79 void didDestroyWindowShell(ScriptController* scriptController) { m_scriptControllersWithWindowShells.remove(scriptController); }
80
81 // FIXME: can we make this private?
82 DOMObjectWrapperMap m_wrappers;
83 JSStringCache m_stringCache;
84 HashMap<CSSValue*, void*> m_cssValueRoots;
85
isNormal()86 bool isNormal() const { return m_isNormal; }
87
globalData()88 JSC::JSGlobalData* globalData() const { return m_globalData; }
defaultWrapperOwner()89 JSDOMWrapperOwner* defaultWrapperOwner() { return &m_defaultWrapperOwner; }
stringWrapperOwner()90 JSStringOwner* stringWrapperOwner() { return &m_stringWrapperOwner; }
91
92 protected:
93 DOMWrapperWorld(JSC::JSGlobalData*, bool isNormal);
94
95 private:
96 JSC::JSGlobalData* m_globalData;
97 HashSet<ScriptController*> m_scriptControllersWithWindowShells;
98 bool m_isNormal;
99 JSDOMWrapperOwner m_defaultWrapperOwner;
100 JSStringOwner m_stringWrapperOwner;
101 };
102
103 DOMWrapperWorld* normalWorld(JSC::JSGlobalData&);
104 DOMWrapperWorld* mainThreadNormalWorld();
debuggerWorld()105 inline DOMWrapperWorld* debuggerWorld() { return mainThreadNormalWorld(); }
pluginWorld()106 inline DOMWrapperWorld* pluginWorld() { return mainThreadNormalWorld(); }
107
currentWorld(JSC::ExecState * exec)108 inline DOMWrapperWorld* currentWorld(JSC::ExecState* exec)
109 {
110 return static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->world();
111 }
112
113 } // namespace WebCore
114
115 #endif // DOMWrapperWorld_h
116