1 /*
2  * Copyright (C) 2008 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 COMPUTER, INC. ``AS IS'' AND ANY
14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24  *
25  */
26 
27 #ifndef JSDOMGlobalObject_h
28 #define JSDOMGlobalObject_h
29 
30 #include <runtime/JSGlobalObject.h>
31 
32 namespace WebCore {
33 
34     class Document;
35     class Event;
36     class DOMWrapperWorld;
37     class JSLazyEventListener;
38     class JSEventListener;
39     class ScriptExecutionContext;
40 
41     typedef HashMap<const JSC::ClassInfo*, JSC::WriteBarrier<JSC::Structure> > JSDOMStructureMap;
42     typedef HashMap<const JSC::ClassInfo*, JSC::WriteBarrier<JSC::JSObject> > JSDOMConstructorMap;
43 
44     class JSDOMGlobalObject : public JSC::JSGlobalObject {
45         typedef JSC::JSGlobalObject Base;
46     protected:
47         struct JSDOMGlobalObjectData;
48 
49         JSDOMGlobalObject(JSC::JSGlobalData&, JSC::Structure*, PassRefPtr<DOMWrapperWorld>, JSC::JSObject* thisValue);
50 
51     public:
structures()52         JSDOMStructureMap& structures() { return m_structures; }
constructors()53         JSDOMConstructorMap& constructors() { return m_constructors; }
54 
55         virtual ScriptExecutionContext* scriptExecutionContext() const = 0;
56 
57         // Make binding code generation easier.
globalObject()58         JSDOMGlobalObject* globalObject() { return this; }
59 
60         void setCurrentEvent(Event*);
61         Event* currentEvent() const;
62 
63         void setInjectedScript(JSObject*);
64         JSObject* injectedScript() const;
65 
66         virtual void visitChildren(JSC::SlotVisitor&);
67 
world()68         DOMWrapperWorld* world() { return m_world.get(); }
69 
70         static const JSC::ClassInfo s_info;
71 
createStructure(JSC::JSGlobalData & globalData,JSC::JSValue prototype)72         static JSC::Structure* createStructure(JSC::JSGlobalData& globalData, JSC::JSValue prototype)
73         {
74             return JSC::Structure::create(globalData, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), AnonymousSlotCount, &s_info);
75         }
76 
77     protected:
78         JSDOMStructureMap m_structures;
79         JSDOMConstructorMap m_constructors;
80 
81         Event* m_currentEvent;
82         RefPtr<DOMWrapperWorld> m_world;
83         JSC::WriteBarrier<JSObject> m_injectedScript;
84     };
85 
86     template<class ConstructorClass>
getDOMConstructor(JSC::ExecState * exec,const JSDOMGlobalObject * globalObject)87     inline JSC::JSObject* getDOMConstructor(JSC::ExecState* exec, const JSDOMGlobalObject* globalObject)
88     {
89         if (JSC::JSObject* constructor = const_cast<JSDOMGlobalObject*>(globalObject)->constructors().get(&ConstructorClass::s_info).get())
90             return constructor;
91         JSC::JSObject* constructor = new (exec) ConstructorClass(exec, ConstructorClass::createStructure(exec->globalData(), globalObject->objectPrototype()), const_cast<JSDOMGlobalObject*>(globalObject));
92         ASSERT(!const_cast<JSDOMGlobalObject*>(globalObject)->constructors().contains(&ConstructorClass::s_info));
93         JSC::WriteBarrier<JSC::JSObject> temp;
94         const_cast<JSDOMGlobalObject*>(globalObject)->constructors().add(&ConstructorClass::s_info, temp).first->second.set(exec->globalData(), globalObject, constructor);
95         return constructor;
96     }
97 
98     JSDOMGlobalObject* toJSDOMGlobalObject(Document*, JSC::ExecState*);
99     JSDOMGlobalObject* toJSDOMGlobalObject(ScriptExecutionContext*, JSC::ExecState*);
100 
101     JSDOMGlobalObject* toJSDOMGlobalObject(Document*, DOMWrapperWorld*);
102     JSDOMGlobalObject* toJSDOMGlobalObject(ScriptExecutionContext*, DOMWrapperWorld*);
103 
104 } // namespace WebCore
105 
106 #endif // JSDOMGlobalObject_h
107