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      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*, RefPtr<JSC::Structure> > JSDOMStructureMap;
     42     typedef HashMap<const JSC::ClassInfo*, JSC::JSObject*> JSDOMConstructorMap;
     43 
     44     class JSDOMGlobalObject : public JSC::JSGlobalObject {
     45         typedef JSC::JSGlobalObject Base;
     46     protected:
     47         struct JSDOMGlobalObjectData;
     48 
     49         JSDOMGlobalObject(NonNullPassRefPtr<JSC::Structure>, JSDOMGlobalObjectData*, JSC::JSObject* thisValue);
     50 
     51     public:
     52         JSDOMStructureMap& structures() { return d()->structures; }
     53         JSDOMConstructorMap& constructors() const { return d()->constructors; }
     54 
     55         virtual ScriptExecutionContext* scriptExecutionContext() const = 0;
     56 
     57         // Make binding code generation easier.
     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 markChildren(JSC::MarkStack&);
     67 
     68         DOMWrapperWorld* world() { return d()->m_world.get(); }
     69 
     70         virtual const JSC::ClassInfo* classInfo() const { return &s_info; }
     71         static const JSC::ClassInfo s_info;
     72 
     73     protected:
     74         struct JSDOMGlobalObjectData : public JSC::JSGlobalObject::JSGlobalObjectData {
     75             JSDOMGlobalObjectData(DOMWrapperWorld* world, Destructor destructor = destroyJSDOMGlobalObjectData)
     76                 : JSGlobalObjectData(destructor)
     77                 , evt(0)
     78                 , m_world(world)
     79                 , m_injectedScript(0)
     80             {
     81             }
     82 
     83             JSDOMStructureMap structures;
     84             JSDOMConstructorMap constructors;
     85 
     86             Event* evt;
     87             RefPtr<DOMWrapperWorld> m_world;
     88             JSObject* m_injectedScript;
     89         };
     90 
     91     private:
     92         static void destroyJSDOMGlobalObjectData(void*);
     93 
     94         JSDOMGlobalObjectData* d() const { return static_cast<JSDOMGlobalObjectData*>(JSC::JSVariableObject::d); }
     95     };
     96 
     97     template<class ConstructorClass>
     98     inline JSC::JSObject* getDOMConstructor(JSC::ExecState* exec, const JSDOMGlobalObject* globalObject)
     99     {
    100         if (JSC::JSObject* constructor = globalObject->constructors().get(&ConstructorClass::s_info))
    101             return constructor;
    102         JSC::JSObject* constructor = new (exec) ConstructorClass(exec, const_cast<JSDOMGlobalObject*>(globalObject));
    103         ASSERT(!globalObject->constructors().contains(&ConstructorClass::s_info));
    104         globalObject->constructors().set(&ConstructorClass::s_info, constructor);
    105         return constructor;
    106     }
    107 
    108     JSDOMGlobalObject* toJSDOMGlobalObject(Document*, JSC::ExecState*);
    109     JSDOMGlobalObject* toJSDOMGlobalObject(ScriptExecutionContext*, JSC::ExecState*);
    110 
    111     JSDOMGlobalObject* toJSDOMGlobalObject(Document*, DOMWrapperWorld*);
    112     JSDOMGlobalObject* toJSDOMGlobalObject(ScriptExecutionContext*, DOMWrapperWorld*);
    113 
    114 } // namespace WebCore
    115 
    116 #endif // JSDOMGlobalObject_h
    117