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      1 /*
      2  * Copyright (C) 2013 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 WebEmbeddedWorker_h
     32 #define WebEmbeddedWorker_h
     33 
     34 #include "public/platform/WebCommon.h"
     35 
     36 namespace blink {
     37 
     38 class WebServiceWorkerContextClient;
     39 class WebString;
     40 class WebWorkerPermissionClientProxy;
     41 struct WebEmbeddedWorkerStartData;
     42 
     43 // An interface to start and terminate an embedded worker.
     44 // All methods of this class must be called on the main thread.
     45 class WebEmbeddedWorker {
     46 public:
     47     // Invoked on the main thread to instantiate a WebEmbeddedWorker.
     48     // The given WebWorkerContextClient and WebWorkerPermissionClientProxy are
     49     // going to be passed on to the worker thread and is held by a newly
     50     // created WorkerGlobalScope.
     51     BLINK_EXPORT static WebEmbeddedWorker* create(
     52         WebServiceWorkerContextClient*,
     53         WebWorkerPermissionClientProxy*);
     54 
     55     virtual ~WebEmbeddedWorker() { }
     56 
     57     // Starts and terminates WorkerThread and WorkerGlobalScope.
     58     virtual void startWorkerContext(const WebEmbeddedWorkerStartData&) = 0;
     59     virtual void terminateWorkerContext() = 0;
     60 
     61     // Resumes starting a worker startup that was paused via
     62     // WebEmbeddedWorkerStartData.pauseAfterDownloadMode.
     63     virtual void resumeAfterDownload() = 0;
     64 
     65     // Inspector related methods.
     66     virtual void resumeWorkerContext() = 0;
     67     virtual void attachDevTools() = 0;
     68     virtual void reattachDevTools(const WebString& savedState) = 0;
     69     virtual void detachDevTools() = 0;
     70     virtual void dispatchDevToolsMessage(const WebString&) = 0;
     71 };
     72 
     73 } // namespace blink
     74 
     75 #endif // WebEmbeddedWorker_h
     76