1 /* 2 * Copyright (C) 1999-2000 Harri Porten (porten (at) kde.org) 3 * Copyright (C) 2007, 2008 Apple Inc. All rights reserved. 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Lesser General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Lesser General Public License for more details. 14 * 15 * You should have received a copy of the GNU Lesser General Public 16 * License along with this library; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 * 19 */ 20 21 #ifndef StringObjectThatMasqueradesAsUndefined_h 22 #define StringObjectThatMasqueradesAsUndefined_h 23 24 #include "JSGlobalObject.h" 25 #include "StringObject.h" 26 #include "UString.h" 27 28 namespace JSC { 29 30 // WebCore uses this to make style.filter undetectable 31 class StringObjectThatMasqueradesAsUndefined : public StringObject { 32 public: 33 static StringObjectThatMasqueradesAsUndefined* create(ExecState* exec, const UString& string) 34 { 35 return new (exec) StringObjectThatMasqueradesAsUndefined(exec, 36 createStructure(exec->globalData(), exec->lexicalGlobalObject()->stringPrototype()), string); 37 } 38 39 private: 40 StringObjectThatMasqueradesAsUndefined(ExecState* exec, Structure* structure, const UString& string) 41 : StringObject(exec, structure, string) 42 { 43 } 44 45 static Structure* createStructure(JSGlobalData& globalData, JSValue proto) 46 { 47 return Structure::create(globalData, proto, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount, &s_info); 48 } 49 50 static const unsigned StructureFlags = OverridesGetOwnPropertySlot | MasqueradesAsUndefined | OverridesGetPropertyNames | StringObject::StructureFlags; 51 52 virtual bool toBoolean(ExecState*) const { return false; } 53 }; 54 55 } // namespace JSC 56 57 #endif // StringObjectThatMasqueradesAsUndefined_h 58
