2 * Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
3 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
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.
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.
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
22 #include "FunctionConstructor.h"
25 #include "ExceptionHelpers.h"
26 #include "FunctionPrototype.h"
27 #include "JSFunction.h"
28 #include "JSGlobalObject.h"
33 #include "UStringBuilder.h"
34 #include "UStringConcatenate.h"
38 ASSERT_CLASS_FITS_IN_CELL(FunctionConstructor);
40 const ClassInfo FunctionConstructor::s_info = { "Function", &Base::s_info, 0, 0, CREATE_METHOD_TABLE(FunctionConstructor) };
42 FunctionConstructor::FunctionConstructor(JSGlobalObject* globalObject, Structure* structure)
43 : InternalFunction(globalObject, structure)
47 void FunctionConstructor::finishCreation(ExecState* exec, FunctionPrototype* functionPrototype)
49 Base::finishCreation(exec->globalData(), Identifier(exec, functionPrototype->classInfo()->className));
50 putDirectWithoutTransition(exec->globalData(), exec->propertyNames().prototype, functionPrototype, DontEnum | DontDelete | ReadOnly);
52 // Number of arguments for constructor
53 putDirectWithoutTransition(exec->globalData(), exec->propertyNames().length, jsNumber(1), ReadOnly | DontDelete | DontEnum);
56 static EncodedJSValue JSC_HOST_CALL constructWithFunctionConstructor(ExecState* exec)
59 return JSValue::encode(constructFunction(exec, asInternalFunction(exec->callee())->globalObject(), args));
62 ConstructType FunctionConstructor::getConstructData(JSCell*, ConstructData& constructData)
64 constructData.native.function = constructWithFunctionConstructor;
65 return ConstructTypeHost;
68 static EncodedJSValue JSC_HOST_CALL callFunctionConstructor(ExecState* exec)
71 return JSValue::encode(constructFunction(exec, asInternalFunction(exec->callee())->globalObject(), args));
74 // ECMA 15.3.1 The Function Constructor Called as a Function
75 CallType FunctionConstructor::getCallData(JSCell*, CallData& callData)
77 callData.native.function = callFunctionConstructor;
81 // ECMA 15.3.2 The Function Constructor
82 JSObject* constructFunction(ExecState* exec, JSGlobalObject* globalObject, const ArgList& args, const Identifier& functionName, const UString& sourceURL, const TextPosition& position)
84 if (!globalObject->evalEnabled())
85 return throwError(exec, createEvalError(exec, "Function constructor is disabled"));
86 return constructFunctionSkippingEvalEnabledCheck(exec, globalObject, args, functionName, sourceURL, position);
89 JSObject* constructFunctionSkippingEvalEnabledCheck(ExecState* exec, JSGlobalObject* globalObject, const ArgList& args, const Identifier& functionName, const UString& sourceURL, const TextPosition& position)
91 // Functions need to have a space following the opening { due to for web compatibility
92 // see https://bugs.webkit.org/show_bug.cgi?id=24350
93 // We also need \n before the closing } to handle // comments at the end of the last line
96 program = "(function() { \n})";
97 else if (args.size() == 1)
98 program = makeUString("(function() { ", args.at(0).toString(exec), "\n})");
100 UStringBuilder builder;
101 builder.append("(function(");
102 builder.append(args.at(0).toString(exec));
103 for (size_t i = 1; i < args.size() - 1; i++) {
105 builder.append(args.at(i).toString(exec));
107 builder.append(") { ");
108 builder.append(args.at(args.size() - 1).toString(exec));
109 builder.append("\n})");
110 program = builder.toUString();
113 JSGlobalData& globalData = globalObject->globalData();
114 SourceCode source = makeSource(program, sourceURL, position);
115 JSObject* exception = 0;
116 FunctionExecutable* function = FunctionExecutable::fromGlobalCode(functionName, exec, exec->dynamicGlobalObject()->debugger(), source, &exception);
119 return throwError(exec, exception);
122 ScopeChainNode* scopeChain = ScopeChainNode::create(exec, 0, globalObject, &globalData, globalObject, exec->globalThisValue());
123 return JSFunction::create(exec, function, scopeChain);
126 // ECMA 15.3.2 The Function Constructor
127 JSObject* constructFunction(ExecState* exec, JSGlobalObject* globalObject, const ArgList& args)
129 return constructFunction(exec, globalObject, args, Identifier(exec, "anonymous"), UString(), TextPosition::minimumPosition());