runtime/JSStaticScopeObject.h

   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