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      1 /*
      2  * Copyright (C) 2009 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 WebWorkerImpl_h
     32 #define WebWorkerImpl_h
     33 
     34 #include "WebWorker.h"
     35 
     36 #if ENABLE(WORKERS)
     37 
     38 #include "ScriptExecutionContext.h"
     39 
     40 #include "WebWorkerBase.h"
     41 
     42 namespace WebKit {
     43 class WebView;
     44 
     45 // This class is used by the worker process code to talk to the WebCore::Worker
     46 // implementation.  It can't use it directly since it uses WebKit types, so this
     47 // class converts the data types.  When the WebCore::Worker object wants to call
     48 // WebCore::WorkerObjectProxy, this class will conver to Chrome data types first
     49 // and then call the supplied WebWorkerClient.
     50 class WebWorkerImpl : public WebWorkerBase, public WebWorker {
     51 public:
     52     explicit WebWorkerImpl(WebWorkerClient* client);
     53 
     54     // WebWorker methods:
     55     virtual void startWorkerContext(const WebURL&, const WebString&, const WebString&);
     56     virtual void terminateWorkerContext();
     57     virtual void postMessageToWorkerContext(const WebString&, const WebMessagePortChannelArray&);
     58     virtual void workerObjectDestroyed();
     59     virtual void clientDestroyed();
     60 
     61     // WebWorkerBase methods:
     62     virtual WebWorkerClient* client() { return m_client; }
     63     virtual WebCommonWorkerClient* commonClient();
     64 
     65 private:
     66     virtual ~WebWorkerImpl();
     67 
     68     // Tasks that are run on the worker thread.
     69     static void postMessageToWorkerContextTask(
     70         WebCore::ScriptExecutionContext* context,
     71         WebWorkerImpl* thisPtr,
     72         const WTF::String& message,
     73         PassOwnPtr<WebCore::MessagePortChannelArray> channels);
     74 
     75     WebWorkerClient* m_client;
     76 
     77 };
     78 
     79 } // namespace WebKit
     80 
     81 #endif // ENABLE(WORKERS)
     82 
     83 #endif
     84