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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 "public/web/WebContentSecurityPolicy.h"
     35 #include "public/web/WebEmbeddedWorker.h"
     36 #include "public/web/WebEmbeddedWorkerStartData.h"
     37 #include "public/web/WebFrameClient.h"
     38 
     39 namespace WebCore {
     40 class WorkerScriptLoader;
     41 class WorkerThread;
     42 }
     43 
     44 namespace blink {
     45 
     46 class ServiceWorkerGlobalScopeProxy;
     47 class WebServiceWorkerNetworkProvider;
     48 class WebView;
     49 
     50 class WebEmbeddedWorkerImpl FINAL :
     51     public WebEmbeddedWorker,
     52     public WebFrameClient {
     53     WTF_MAKE_NONCOPYABLE(WebEmbeddedWorkerImpl);
     54 public:
     55     WebEmbeddedWorkerImpl(
     56         PassOwnPtr<WebServiceWorkerContextClient>,
     57         PassOwnPtr<WebWorkerPermissionClientProxy>);
     58     virtual ~WebEmbeddedWorkerImpl();
     59 
     60     // WebEmbeddedWorker overrides.
     61     virtual void startWorkerContext(const WebEmbeddedWorkerStartData&) OVERRIDE;
     62     virtual void resumeAfterDownload() OVERRIDE;
     63     virtual void terminateWorkerContext() OVERRIDE;
     64     virtual void resumeWorkerContext() OVERRIDE;
     65     virtual void attachDevTools() OVERRIDE;
     66     virtual void reattachDevTools(const WebString& savedState) OVERRIDE;
     67     virtual void detachDevTools() OVERRIDE;
     68     virtual void dispatchDevToolsMessage(const WebString&) OVERRIDE;
     69 
     70 
     71 private:
     72     class Loader;
     73     class LoaderProxy;
     74 
     75     void prepareShadowPageForLoader();
     76 
     77     // WebFrameClient overrides.
     78     virtual void willSendRequest(
     79         WebLocalFrame*, unsigned identifier, WebURLRequest&,
     80         const WebURLResponse& redirectResponse) OVERRIDE;
     81     virtual void didFinishDocumentLoad(WebLocalFrame*) OVERRIDE;
     82 
     83     void onScriptLoaderFinished();
     84     void startWorkerThread();
     85 
     86     WebEmbeddedWorkerStartData m_workerStartData;
     87 
     88     OwnPtr<WebServiceWorkerContextClient> m_workerContextClient;
     89 
     90     // This is kept until startWorkerContext is called, and then passed on
     91     // to WorkerContext.
     92     OwnPtr<WebWorkerPermissionClientProxy> m_permissionClient;
     93 
     94     // We retain ownership of this one which is for use on the
     95     // main thread only.
     96     OwnPtr<WebServiceWorkerNetworkProvider> m_networkProvider;
     97 
     98     // Kept around only while main script loading is ongoing.
     99     OwnPtr<Loader> m_mainScriptLoader;
    100 
    101     RefPtr<WebCore::WorkerThread> m_workerThread;
    102     OwnPtr<LoaderProxy> m_loaderProxy;
    103     OwnPtr<ServiceWorkerGlobalScopeProxy> m_workerGlobalScopeProxy;
    104 
    105     // 'shadow page' - created to proxy loading requests from the worker.
    106     // Both WebView and WebFrame objects are close()'ed (where they're
    107     // deref'ed) when this EmbeddedWorkerImpl is destructed, therefore they
    108     // are guaranteed to exist while this object is around.
    109     WebView* m_webView;
    110     WebFrame* m_mainFrame;
    111 
    112     bool m_askedToTerminate;
    113 
    114     enum {
    115         DontPauseAfterDownload,
    116         DoPauseAfterDownload,
    117         IsPausedAfterDownload
    118     } m_pauseAfterDownloadState;
    119 };
    120 
    121 } // namespace blink
    122 
    123 #endif // WebEmbeddedWorkerImpl_h
    124