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      1 /*
      2  * Copyright (C) 2010 Google 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 are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef AbstractWorker_h
     32 #define AbstractWorker_h
     33 
     34 #if ENABLE(WORKERS)
     35 
     36 #include "ActiveDOMObject.h"
     37 #include "EventListener.h"
     38 #include "EventNames.h"
     39 #include "EventTarget.h"
     40 #include <wtf/PassRefPtr.h>
     41 #include <wtf/RefCounted.h>
     42 #include <wtf/RefPtr.h>
     43 #include <wtf/text/AtomicStringHash.h>
     44 
     45 namespace WebCore {
     46 
     47     class KURL;
     48     class ScriptExecutionContext;
     49 
     50     class AbstractWorker : public RefCounted<AbstractWorker>, public ActiveDOMObject, public EventTarget {
     51     public:
     52         // EventTarget APIs
     53         virtual ScriptExecutionContext* scriptExecutionContext() const { return ActiveDOMObject::scriptExecutionContext(); }
     54 
     55         DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
     56 
     57         using RefCounted<AbstractWorker>::ref;
     58         using RefCounted<AbstractWorker>::deref;
     59 
     60         virtual void contextDestroyed();
     61         AbstractWorker(ScriptExecutionContext*);
     62         virtual ~AbstractWorker();
     63 
     64     protected:
     65         // Helper function that converts a URL to an absolute URL and checks the result for validity.
     66         KURL resolveURL(const String& url, ExceptionCode& ec);
     67         intptr_t asID() const { return reinterpret_cast<intptr_t>(this); }
     68 
     69     private:
     70         virtual void refEventTarget() { ref(); }
     71         virtual void derefEventTarget() { deref(); }
     72         virtual EventTargetData* eventTargetData();
     73         virtual EventTargetData* ensureEventTargetData();
     74         void onDestroyWorker();
     75 
     76         EventTargetData m_eventTargetData;
     77     };
     78 
     79 } // namespace WebCore
     80 
     81 #endif // ENABLE(WORKERS)
     82 
     83 #endif // AbstractWorker_h
     84