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(bool& requiresDynamicChecks) 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