1 /*

     2  *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)

     3  *  Copyright (C) 2003, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.

     4  *  Copyright (C) 2007 Cameron Zwarich (cwzwarich@uwaterloo.ca)

     5  *  Copyright (C) 2007 Maks Orlovich

     6  *

     7  *  This library is free software; you can redistribute it and/or

     8  *  modify it under the terms of the GNU Library General Public

     9  *  License as published by the Free Software Foundation; either

    10  *  version 2 of the License, or (at your option) any later version.

    11  *

    12  *  This library is distributed in the hope that it will be useful,

    13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of

    14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    15  *  Library General Public License for more details.

    16  *

    17  *  You should have received a copy of the GNU Library General Public License

    18  *  along with this library; see the file COPYING.LIB.  If not, write to

    19  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

    20  *  Boston, MA 02110-1301, USA.

    21  *

    22  */

    23 

    24 #ifndef JSFunction_h

    25 #define JSFunction_h

    26 

    27 #include "JSObjectWithGlobalObject.h"

    28 

    29 namespace JSC {

    30 

    31     class ExecutableBase;

    32     class FunctionExecutable;

    33     class FunctionPrototype;

    34     class JSActivation;

    35     class JSGlobalObject;

    36     class NativeExecutable;

    37 

    38     EncodedJSValue JSC_HOST_CALL callHostFunctionAsConstructor(ExecState*);

    39 

    40     class JSFunction : public JSObjectWithGlobalObject {

    41         friend class JIT;

    42         friend class JSGlobalData;

    43 

    44         typedef JSObjectWithGlobalObject Base;

    45 

    46     public:

    47         JSFunction(ExecState*, JSGlobalObject*, NonNullPassRefPtr<Structure>, int length, const Identifier&, NativeFunction);

    48 #if ENABLE(JIT)

    49         JSFunction(ExecState*, JSGlobalObject*, NonNullPassRefPtr<Structure>, int length, const Identifier&, PassRefPtr<NativeExecutable>);

    50 #endif

    51         JSFunction(ExecState*, NonNullPassRefPtr<FunctionExecutable>, ScopeChainNode*);

    52         virtual ~JSFunction();

    53 

    54         const UString& name(ExecState*);

    55         const UString displayName(ExecState*);

    56         const UString calculatedDisplayName(ExecState*);

    57 

    58         ScopeChain& scope()

    59         {

    60             ASSERT(!isHostFunctionNonInline());

    61             return m_scopeChain;

    62         }

    63         void setScope(const ScopeChain& scopeChain)

    64         {

    65             ASSERT(!isHostFunctionNonInline());

    66             m_scopeChain = scopeChain;

    67         }

    68 

    69         ExecutableBase* executable() const { return m_executable.get(); }

    70 

    71         // To call either of these methods include Executable.h

    72         inline bool isHostFunction() const;

    73         FunctionExecutable* jsExecutable() const;

    74 

    75         static JS_EXPORTDATA const ClassInfo info;

    76 

    77         static PassRefPtr<Structure> createStructure(JSValue prototype) 

    78         { 

    79             return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount); 

    80         }

    81 

    82         NativeFunction nativeFunction();

    83 

    84         virtual ConstructType getConstructData(ConstructData&);

    85         virtual CallType getCallData(CallData&);

    86 

    87     protected:

    88         const static unsigned StructureFlags = OverridesGetOwnPropertySlot | ImplementsHasInstance | OverridesMarkChildren | OverridesGetPropertyNames | JSObject::StructureFlags;

    89 

    90     private:

    91         JSFunction(NonNullPassRefPtr<Structure>);

    92 

    93         bool isHostFunctionNonInline() const;

    94 

    95         virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);

    96         virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);

    97         virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties);

    98         virtual void put(ExecState*, const Identifier& propertyName, JSValue, PutPropertySlot&);

    99         virtual bool deleteProperty(ExecState*, const Identifier& propertyName);

   100 

   101         virtual void markChildren(MarkStack&);

   102 

   103         virtual const ClassInfo* classInfo() const { return &info; }

   104 

   105         static JSValue argumentsGetter(ExecState*, JSValue, const Identifier&);

   106         static JSValue callerGetter(ExecState*, JSValue, const Identifier&);

   107         static JSValue lengthGetter(ExecState*, JSValue, const Identifier&);

   108 

   109         RefPtr<ExecutableBase> m_executable;

   110         ScopeChain m_scopeChain;

   111     };

   112 

   113     JSFunction* asFunction(JSValue);

   114 

   115     inline JSFunction* asFunction(JSValue value)

   116     {

   117         ASSERT(asObject(value)->inherits(&JSFunction::info));

   118         return static_cast<JSFunction*>(asObject(value));

   119     }

   120 

   121 } // namespace JSC

   122 

   123 #endif // JSFunction_h