kjs Library API Documentation

bool_object.cpp

00001 // -*- c-basic-offset: 2 -*-
00002 /*
00003  *  This file is part of the KDE libraries
00004  *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
00005  *  Copyright (C) 2003 Apple Computer, Inc.
00006  *
00007  *  This library is free software; you can redistribute it and/or
00008  *  modify it under the terms of the GNU Lesser General Public
00009  *  License as published by the Free Software Foundation; either
00010  *  version 2 of the License, or (at your option) any later version.
00011  *
00012  *  This library is distributed in the hope that it will be useful,
00013  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  *  Lesser General Public License for more details.
00016  *
00017  *  You should have received a copy of the GNU Lesser General Public
00018  *  License along with this library; if not, write to the Free Software
00019  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00020  *
00021  */
00022 
00023 #include "value.h"
00024 #include "object.h"
00025 #include "types.h"
00026 #include "interpreter.h"
00027 #include "operations.h"
00028 #include "bool_object.h"
00029 #include "error_object.h"
00030 #include "lookup.h"
00031 
00032 #include <assert.h>
00033 
00034 using namespace KJS;
00035 
00036 // ------------------------------ BooleanInstanceImp ---------------------------
00037 
00038 const ClassInfo BooleanInstanceImp::info = {"Boolean", 0, 0, 0};
00039 
00040 BooleanInstanceImp::BooleanInstanceImp(ObjectImp *proto)
00041   : ObjectImp(proto)
00042 {
00043 }
00044 
00045 // ------------------------------ BooleanPrototypeImp --------------------------
00046 
00047 // ECMA 15.6.4
00048 
00049 BooleanPrototypeImp::BooleanPrototypeImp(ExecState *exec,
00050                                          ObjectPrototypeImp *objectProto,
00051                                          FunctionPrototypeImp *funcProto)
00052   : BooleanInstanceImp(objectProto)
00053 {
00054   Value protect(this);
00055   // The constructor will be added later by InterpreterImp::InterpreterImp()
00056 
00057   putDirect(toStringPropertyName,
00058         new BooleanProtoFuncImp(exec,funcProto,BooleanProtoFuncImp::ToString,0,toStringPropertyName), DontEnum);
00059   putDirect(valueOfPropertyName,
00060         new BooleanProtoFuncImp(exec,funcProto,BooleanProtoFuncImp::ValueOf,0,valueOfPropertyName),  DontEnum);
00061   setInternalValue(Boolean(false));
00062 }
00063 
00064 
00065 // ------------------------------ BooleanProtoFuncImp --------------------------
00066 
00067 BooleanProtoFuncImp::BooleanProtoFuncImp(ExecState * /*exec*/, FunctionPrototypeImp *funcProto,
00068                                          int i, int len, const Identifier &_ident)
00069   : InternalFunctionImp(funcProto), id(i)
00070 {
00071   Value protect(this);
00072   putDirect(lengthPropertyName, len, DontDelete|ReadOnly|DontEnum);
00073   ident = _ident;
00074 }
00075 
00076 
00077 bool BooleanProtoFuncImp::implementsCall() const
00078 {
00079   return true;
00080 }
00081 
00082 
00083 // ECMA 15.6.4.2 + 15.6.4.3
00084 Value BooleanProtoFuncImp::call(ExecState *exec, Object &thisObj, const List &/*args*/)
00085 {
00086   // no generic function. "this" has to be a Boolean object
00087   KJS_CHECK_THIS( BooleanInstanceImp, thisObj );
00088 
00089   // execute "toString()" or "valueOf()", respectively
00090 
00091   Value v = thisObj.internalValue();
00092   assert(v.isValid());
00093 
00094   if (id == ToString)
00095     return String(v.toString(exec));
00096   else
00097     return Boolean(v.toBoolean(exec)); /* TODO: optimize for bool case */
00098 }
00099 
00100 // ------------------------------ BooleanObjectImp -----------------------------
00101 
00102 
00103 BooleanObjectImp::BooleanObjectImp(ExecState * /*exec*/, FunctionPrototypeImp *funcProto,
00104                                    BooleanPrototypeImp *booleanProto)
00105   : InternalFunctionImp(funcProto)
00106 {
00107   Value protect(this);
00108   putDirect(prototypePropertyName, booleanProto,DontEnum|DontDelete|ReadOnly);
00109 
00110   // no. of arguments for constructor
00111   putDirect(lengthPropertyName, NumberImp::one(), ReadOnly|DontDelete|DontEnum);
00112 }
00113 
00114 
00115 bool BooleanObjectImp::implementsConstruct() const
00116 {
00117   return true;
00118 }
00119 
00120 // ECMA 15.6.2
00121 Object BooleanObjectImp::construct(ExecState *exec, const List &args)
00122 {
00123   Object obj(new BooleanInstanceImp(exec->interpreter()->builtinBooleanPrototype().imp()));
00124 
00125   Boolean b;
00126   if (args.size() > 0)
00127     b = args.begin()->dispatchToBoolean(exec);
00128   else
00129     b = Boolean(false);
00130 
00131   obj.setInternalValue(b);
00132 
00133   return obj;
00134 }
00135 
00136 bool BooleanObjectImp::implementsCall() const
00137 {
00138   return true;
00139 }
00140 
00141 // ECMA 15.6.1
00142 Value BooleanObjectImp::call(ExecState *exec, Object &/*thisObj*/, const List &args)
00143 {
00144   if (args.isEmpty())
00145     return Boolean(false);
00146   else
00147     return Boolean(args[0].toBoolean(exec)); /* TODO: optimize for bool case */
00148 }
00149 
KDE Logo
This file is part of the documentation for kjs Library Version 3.4.0.
Documentation copyright © 1996-2004 the KDE developers.
Generated on Fri Jul 21 13:14:13 2006 by doxygen 1.4.0 written by Dimitri van Heesch, © 1997-2003