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      1 /*
      2  * Copyright (C) 2008, 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. ``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 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 #ifndef JSStaticScopeObject_h
     27 #define JSStaticScopeObject_h
     28 
     29 #include "JSVariableObject.h"
     30 
     31 namespace JSC{
     32 
     33     class JSStaticScopeObject : public JSVariableObject {
     34     protected:
     35         using JSVariableObject::JSVariableObjectData;
     36         struct JSStaticScopeObjectData : public JSVariableObjectData {
     37             JSStaticScopeObjectData()
     38                 : JSVariableObjectData(&symbolTable, &registerStore + 1)
     39             {
     40             }
     41             SymbolTable symbolTable;
     42             Register registerStore;
     43         };
     44 
     45     public:
     46         JSStaticScopeObject(ExecState* exec, const Identifier& ident, JSValue value, unsigned attributes)
     47             : JSVariableObject(exec->globalData().staticScopeStructure, new JSStaticScopeObjectData())
     48         {
     49             d()->registerStore = value;
     50             symbolTable().add(ident.ustring().rep(), SymbolTableEntry(-1, attributes));
     51         }
     52         virtual ~JSStaticScopeObject();
     53         virtual void markChildren(MarkStack&);
     54         bool isDynamicScope() const;
     55         virtual JSObject* toThisObject(ExecState*) const;
     56         virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
     57         virtual void put(ExecState*, const Identifier&, JSValue, PutPropertySlot&);
     58         void putWithAttributes(ExecState*, const Identifier&, JSValue, unsigned attributes);
     59 
     60         static PassRefPtr<Structure> createStructure(JSValue proto) { return Structure::create(proto, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount); }
     61 
     62     protected:
     63         static const unsigned StructureFlags = OverridesGetOwnPropertySlot | NeedsThisConversion | OverridesMarkChildren | OverridesGetPropertyNames | JSVariableObject::StructureFlags;
     64 
     65     private:
     66         JSStaticScopeObjectData* d() { return static_cast<JSStaticScopeObjectData*>(JSVariableObject::d); }
     67     };
     68 
     69 }
     70 
     71 #endif // JSStaticScopeObject_h
     72