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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef WebWorkerBase_h
#define WebWorkerBase_h
#if ENABLE(WORKERS)
#include "ScriptExecutionContext.h"
#include "WebFrameClient.h"
#include "WorkerLoaderProxy.h"
#include "WorkerObjectProxy.h"
#include <wtf/PassOwnPtr.h>
#include <wtf/RefPtr.h>
namespace WebCore {
class WorkerThread;
}
namespace WebKit {
class WebApplicationCacheHost;
class WebApplicationCacheHostClient;
class WebCommonWorkerClient;
class WebSecurityOrigin;
class WebString;
class WebURL;
class WebView;
class WebWorker;
class WebWorkerClient;
// Base class for WebSharedWorkerImpl and WebWorkerImpl. It contains common
// code used by both implementation classes, including implementations of the
// WorkerObjectProxy and WorkerLoaderProxy interfaces.
class WebWorkerBase : public WebCore::WorkerObjectProxy
, public WebCore::WorkerLoaderProxy
, public WebFrameClient {
public:
WebWorkerBase();
virtual ~WebWorkerBase();
// WebCore::WorkerObjectProxy methods:
virtual void postMessageToWorkerObject(
PassRefPtr<WebCore::SerializedScriptValue>,
PassOwnPtr<WebCore::MessagePortChannelArray>);
virtual void postExceptionToWorkerObject(
const WTF::String&, int, const WTF::String&);
virtual void postConsoleMessageToWorkerObject(
WebCore::MessageSource, WebCore::MessageType,
WebCore::MessageLevel, const WTF::String&, int, const WTF::String&);
virtual void confirmMessageFromWorkerObject(bool);
virtual void reportPendingActivity(bool);
virtual void workerContextClosed();
virtual void workerContextDestroyed();
// WebCore::WorkerLoaderProxy methods:
virtual void postTaskToLoader(PassOwnPtr<WebCore::ScriptExecutionContext::Task>);
virtual void postTaskForModeToWorkerContext(
PassOwnPtr<WebCore::ScriptExecutionContext::Task>, const WTF::String& mode);
// WebFrameClient methods to support resource loading thru the 'shadow page'.
virtual void didCreateDataSource(WebFrame*, WebDataSource*);
virtual WebApplicationCacheHost* createApplicationCacheHost(WebFrame*, WebApplicationCacheHostClient*);
// Controls whether access to Web Databases is allowed for this worker.
virtual bool allowDatabase(WebFrame*, const WebString& name, const WebString& displayName, unsigned long estimatedSize);
#if ENABLE(FILE_SYSTEM)
void openFileSystemForWorker(WebFileSystem::Type, long long size, WebFileSystemCallbacks*, bool synchronous);
#endif
// Executes the given task on the main thread.
static void dispatchTaskToMainThread(PassOwnPtr<WebCore::ScriptExecutionContext::Task>);
protected:
virtual WebWorkerClient* client() = 0;
virtual WebCommonWorkerClient* commonClient() = 0;
void setWorkerThread(PassRefPtr<WebCore::WorkerThread> thread) { m_workerThread = thread; }
WebCore::WorkerThread* workerThread() { return m_workerThread.get(); }
// Shuts down the worker thread.
void stopWorkerThread();
// Creates the shadow loader used for worker network requests.
void initializeLoader(const WebURL&);
private:
// Function used to invoke tasks on the main thread.
static void invokeTaskMethod(void*);
// Tasks that are run on the main thread.
static void postMessageTask(
WebCore::ScriptExecutionContext* context,
WebWorkerBase* thisPtr,
WTF::String message,
PassOwnPtr<WebCore::MessagePortChannelArray> channels);
static void postExceptionTask(
WebCore::ScriptExecutionContext* context,
WebWorkerBase* thisPtr,
const WTF::String& message,
int lineNumber,
const WTF::String& sourceURL);
static void postConsoleMessageTask(
WebCore::ScriptExecutionContext* context,
WebWorkerBase* thisPtr,
int source,
int type,
int level,
const WTF::String& message,
int lineNumber,
const WTF::String& sourceURL);
static void confirmMessageTask(
WebCore::ScriptExecutionContext* context,
WebWorkerBase* thisPtr,
bool hasPendingActivity);
static void reportPendingActivityTask(
WebCore::ScriptExecutionContext* context,
WebWorkerBase* thisPtr,
bool hasPendingActivity);
static void workerContextClosedTask(
WebCore::ScriptExecutionContext* context,
WebWorkerBase* thisPtr);
static void workerContextDestroyedTask(
WebCore::ScriptExecutionContext* context,
WebWorkerBase* thisPtr);
// 'shadow page' - created to proxy loading requests from the worker.
RefPtr<WebCore::ScriptExecutionContext> m_loadingDocument;
WebView* m_webView;
bool m_askedToTerminate;
RefPtr<WebCore::WorkerThread> m_workerThread;
};
} // namespace WebKit
#endif // ENABLE(WORKERS)
#endif
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