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      1 /*
      2  * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
      3  * Copyright (C) 2009 Google 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 
     28 #include "config.h"
     29 
     30 #if ENABLE(WORKERS)
     31 
     32 #include "JSWorkerContextBase.h"
     33 
     34 #include "DOMWrapperWorld.h"
     35 #include "JSDedicatedWorkerContext.h"
     36 #include "JSSharedWorkerContext.h"
     37 #include "JSWorkerContext.h"
     38 #include "WorkerContext.h"
     39 
     40 using namespace JSC;
     41 
     42 namespace WebCore {
     43 
     44 ASSERT_CLASS_FITS_IN_CELL(JSWorkerContextBase);
     45 
     46 const ClassInfo JSWorkerContextBase::s_info = { "WorkerContext", &JSDOMGlobalObject::s_info, 0, 0 };
     47 
     48 JSWorkerContextBase::JSWorkerContextBase(JSC::JSGlobalData& globalData, JSC::Structure* structure, PassRefPtr<WorkerContext> impl)
     49     : JSDOMGlobalObject(globalData, structure, normalWorld(globalData), this)
     50     , m_impl(impl)
     51 {
     52     ASSERT(inherits(&s_info));
     53 }
     54 
     55 JSWorkerContextBase::~JSWorkerContextBase()
     56 {
     57 }
     58 
     59 ScriptExecutionContext* JSWorkerContextBase::scriptExecutionContext() const
     60 {
     61     return m_impl.get();
     62 }
     63 
     64 JSValue toJS(ExecState* exec, JSDOMGlobalObject*, WorkerContext* workerContext)
     65 {
     66     return toJS(exec, workerContext);
     67 }
     68 
     69 JSValue toJS(ExecState*, WorkerContext* workerContext)
     70 {
     71     if (!workerContext)
     72         return jsNull();
     73     WorkerScriptController* script = workerContext->script();
     74     if (!script)
     75         return jsNull();
     76     JSWorkerContext* contextWrapper = script->workerContextWrapper();
     77     ASSERT(contextWrapper);
     78     return contextWrapper;
     79 }
     80 
     81 JSDedicatedWorkerContext* toJSDedicatedWorkerContext(JSValue value)
     82 {
     83     if (!value.isObject())
     84         return 0;
     85     const ClassInfo* classInfo = asObject(value)->classInfo();
     86     if (classInfo == &JSDedicatedWorkerContext::s_info)
     87         return static_cast<JSDedicatedWorkerContext*>(asObject(value));
     88     return 0;
     89 }
     90 
     91 #if ENABLE(SHARED_WORKERS)
     92 JSSharedWorkerContext* toJSSharedWorkerContext(JSValue value)
     93 {
     94     if (!value.isObject())
     95         return 0;
     96     const ClassInfo* classInfo = asObject(value)->classInfo();
     97     if (classInfo == &JSSharedWorkerContext::s_info)
     98         return static_cast<JSSharedWorkerContext*>(asObject(value));
     99     return 0;
    100 }
    101 #endif
    102 
    103 JSWorkerContext* toJSWorkerContext(JSValue value)
    104 {
    105     JSWorkerContext* context = toJSDedicatedWorkerContext(value);
    106 #if ENABLE(SHARED_WORKERS)
    107     if (!context)
    108         context = toJSSharedWorkerContext(value);
    109 #endif
    110     return context;
    111 }
    112 
    113 } // namespace WebCore
    114 
    115 #endif // ENABLE(WORKERS)
    116