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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 WebEmbeddedWorkerImpl_h
     32 #define WebEmbeddedWorkerImpl_h
     33 
     34 #include "WebContentSecurityPolicy.h"
     35 #include "WebEmbeddedWorker.h"
     36 #include "WebEmbeddedWorkerStartData.h"
     37 #include "WebFrameClient.h"
     38 
     39 namespace WebCore {
     40 class WorkerScriptLoader;
     41 class WorkerThread;
     42 }
     43 
     44 namespace blink {
     45 
     46 class ServiceWorkerGlobalScopeProxy;
     47 class WebView;
     48 
     49 class WebEmbeddedWorkerImpl :
     50     public WebEmbeddedWorker,
     51     public WebFrameClient {
     52     WTF_MAKE_NONCOPYABLE(WebEmbeddedWorkerImpl);
     53 public:
     54     WebEmbeddedWorkerImpl(
     55         PassOwnPtr<WebServiceWorkerContextClient>,
     56         PassOwnPtr<WebWorkerPermissionClientProxy>);
     57     virtual ~WebEmbeddedWorkerImpl();
     58 
     59     // WebEmbeddedWorker overrides.
     60     virtual void startWorkerContext(const WebEmbeddedWorkerStartData&) OVERRIDE;
     61     virtual void terminateWorkerContext() OVERRIDE;
     62 
     63 private:
     64     class Loader;
     65     class LoaderProxy;
     66 
     67     void prepareShadowPageForLoader();
     68     void onScriptLoaderFinished();
     69 
     70     // WebFrameClient overrides, for 'shadow page' loading.
     71     virtual void didCreateDataSource(WebFrame*, WebDataSource*) OVERRIDE;
     72 
     73     WebEmbeddedWorkerStartData m_workerStartData;
     74 
     75     // These are kept until startWorkerContext is called, and then passed on
     76     // to WorkerContext.
     77     OwnPtr<WebServiceWorkerContextClient> m_workerContextClient;
     78     OwnPtr<WebWorkerPermissionClientProxy> m_permissionClient;
     79 
     80     // Kept around only while main script loading is ongoing.
     81     OwnPtr<Loader> m_mainScriptLoader;
     82 
     83     RefPtr<WebCore::WorkerThread> m_workerThread;
     84     OwnPtr<LoaderProxy> m_loaderProxy;
     85     OwnPtr<ServiceWorkerGlobalScopeProxy> m_workerGlobalScopeProxy;
     86 
     87     // 'shadow page' - created to proxy loading requests from the worker.
     88     // Both WebView and WebFrame objects are close()'ed (where they're
     89     // deref'ed) when this EmbeddedWorkerImpl is destructed, therefore they
     90     // are guaranteed to exist while this object is around.
     91     WebView* m_webView;
     92     WebFrame* m_mainFrame;
     93     RefPtr<WebCore::ExecutionContext> m_loadingContext;
     94 
     95     bool m_askedToTerminate;
     96 };
     97 
     98 } // namespace blink
     99 
    100 #endif // WebEmbeddedWorkerImpl_h
    101