runtime/GetterSetter.h

   1 /*
   2  *  Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
   3  *  Copyright (C) 2001 Peter Kelly (pmk@post.com)
   4  *  Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
   5  *
   6  *  This library is free software; you can redistribute it and/or
   7  *  modify it under the terms of the GNU Library General Public
   8  *  License as published by the Free Software Foundation; either
   9  *  version 2 of the License, or (at your option) any later version.
  10  *
  11  *  This library is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  *  Library General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU Library General Public License
  17  *  along with this library; see the file COPYING.LIB.  If not, write to
  18  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  *  Boston, MA 02110-1301, USA.
  20  *
  21  */
  22
  23 #ifndef GetterSetter_h
  24 #define GetterSetter_h
  25
  26 #include "JSCell.h"
  27
  28 namespace JSC {
  29
  30     class JSObject;
  31
  32     // This is an internal value object which stores getter and setter functions
  33     // for a property.
  34     class GetterSetter : public JSCell {
  35     public:
  36         GetterSetter()
  37             : JSCell(0)
  38             , m_getter(0)
  39             , m_setter(0)
  40         {
  41         }
  42
  43         virtual void mark();
  44
  45         JSObject* getter() const { return m_getter; }
  46         void setGetter(JSObject* getter) { m_getter = getter; }
  47         JSObject* setter() const { return m_setter; }
  48         void setSetter(JSObject* setter) { m_setter = setter; }
  49
  50     private:
  51         virtual bool isGetterSetter() const;
  52
  53         virtual JSValuePtr toPrimitive(ExecState*, PreferredPrimitiveType) const;
  54         virtual bool getPrimitiveNumber(ExecState*, double& number, JSValuePtr& value);
  55         virtual bool toBoolean(ExecState*) const;
  56         virtual double toNumber(ExecState*) const;
  57         virtual UString toString(ExecState*) const;
  58         virtual JSObject* toObject(ExecState*) const;
  59
  60         JSObject* m_getter;
  61         JSObject* m_setter;
  62     };
  63
  64     GetterSetter* asGetterSetter(JSValuePtr);
  65
  66     inline GetterSetter* asGetterSetter(JSValuePtr value)
  67     {
  68         ASSERT(asCell(value)->isGetterSetter());
  69         return static_cast<GetterSetter*>(asCell(value));
  70     }
  71
  72
  73 } // namespace JSC
  74
  75 #endif // GetterSetter_h