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      1 /*
      2  * Copyright (C) 2008 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 
     28 #if ENABLE(WORKERS)
     29 
     30 #include "JSWorkerConstructor.h"
     31 
     32 #include "Document.h"
     33 #include "ExceptionCode.h"
     34 #include "JSDOMWindowCustom.h"
     35 #include "JSWorker.h"
     36 #include "Worker.h"
     37 #include <runtime/Error.h>
     38 
     39 using namespace JSC;
     40 
     41 namespace WebCore {
     42 
     43 const ClassInfo JSWorkerConstructor::s_info = { "WorkerConstructor", 0, 0, 0 };
     44 
     45 JSWorkerConstructor::JSWorkerConstructor(ExecState* exec, JSDOMGlobalObject* globalObject)
     46     : DOMConstructorObject(JSWorkerConstructor::createStructure(globalObject->objectPrototype()), globalObject)
     47 {
     48     putDirect(exec->propertyNames().prototype, JSWorkerPrototype::self(exec, globalObject), None);
     49     putDirect(exec->propertyNames().length, jsNumber(exec, 1), ReadOnly|DontDelete|DontEnum);
     50 }
     51 
     52 static JSObject* constructWorker(ExecState* exec, JSObject* constructor, const ArgList& args)
     53 {
     54     JSWorkerConstructor* jsConstructor = static_cast<JSWorkerConstructor*>(constructor);
     55 
     56     if (args.size() == 0)
     57         return throwError(exec, SyntaxError, "Not enough arguments");
     58 
     59     UString scriptURL = args.at(0).toString(exec);
     60     if (exec->hadException())
     61         return 0;
     62 
     63     // See section 4.8.2 step 14 of WebWorkers for why this is the lexicalGlobalObject.
     64     DOMWindow* window = asJSDOMWindow(exec->lexicalGlobalObject())->impl();
     65 
     66     ExceptionCode ec = 0;
     67     RefPtr<Worker> worker = Worker::create(scriptURL, window->document(), ec);
     68     if (ec) {
     69         setDOMException(exec, ec);
     70         return 0;
     71     }
     72 
     73     return asObject(toJS(exec, jsConstructor->globalObject(), worker.release()));
     74 }
     75 
     76 ConstructType JSWorkerConstructor::getConstructData(ConstructData& constructData)
     77 {
     78     constructData.native.function = constructWorker;
     79     return ConstructTypeHost;
     80 }
     81 
     82 } // namespace WebCore
     83 
     84 #endif // ENABLE(WORKERS)
     85