API/JSCallbackFunction.cpp

   1 // -*- mode: c++; c-basic-offset: 4 -*-
   2 /*
   3  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include "config.h"
  28 #include <wtf/Platform.h>
  29 #include "JSCallbackFunction.h"
  30
  31 #include "APICast.h"
  32 #include "function.h"
  33 #include "function_object.h"
  34 #include <kjs/JSGlobalObject.h>
  35 #include <wtf/Vector.h>
  36
  37 namespace KJS {
  38
  39 const ClassInfo JSCallbackFunction::info = { "CallbackFunction", &InternalFunctionImp::info, 0};
  40
  41 JSCallbackFunction::JSCallbackFunction(ExecState* exec, JSObjectCallAsFunctionCallback callback, const Identifier& name)
  42     : InternalFunctionImp(exec->lexicalGlobalObject()->functionPrototype(), name)
  43     , m_callback(callback)
  44 {
  45 }
  46
  47 // InternalFunctionImp mish-mashes constructor and function behavior -- we should
  48 // refactor the code so this override isn't necessary
  49 bool JSCallbackFunction::implementsHasInstance() const {
  50     return false;
  51 }
  52
  53 JSValue* JSCallbackFunction::callAsFunction(ExecState* exec, JSObject* thisObj, const List &args)
  54 {
  55     JSContextRef execRef = toRef(exec);
  56     JSObjectRef thisRef = toRef(this);
  57     JSObjectRef thisObjRef = toRef(thisObj);
  58
  59     int argumentCount = static_cast<int>(args.size());
  60     Vector<JSValueRef, 16> arguments(argumentCount);
  61     for (int i = 0; i < argumentCount; i++)
  62         arguments[i] = toRef(args[i]);
  63
  64     JSLock::DropAllLocks dropAllLocks;
  65     return toJS(m_callback(execRef, thisRef, thisObjRef, argumentCount, arguments.data(), toRef(exec->exceptionSlot())));
  66 }
  67
  68 } // namespace KJS