WebCore/WorkerContext.h

   1 /*
   2  * Copyright (C) 2008 Apple 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
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  *
  25  */
  26
  27 #ifndef WorkerContext_h
  28 #define WorkerContext_h
  29
  30 #if ENABLE(WORKERS)
  31
  32 #include "AtomicStringHash.h"
  33 #include "EventListener.h"
  34 #include "EventTarget.h"
  35 #include "ScriptExecutionContext.h"
  36 #include "WorkerScriptController.h"
  37 #include <wtf/OwnPtr.h>
  38 #include <wtf/PassRefPtr.h>
  39 #include <wtf/RefCounted.h>
  40 #include <wtf/RefPtr.h>
  41
  42 namespace WebCore {
  43
  44     class WorkerLocation;
  45     class WorkerNavigator;
  46     class WorkerThread;
  47
  48     class WorkerContext : public RefCounted<WorkerContext>, public ScriptExecutionContext, public EventTarget {
  49     public:
  50         static PassRefPtr<WorkerContext> create(const KURL& url, const String& userAgent, WorkerThread* thread)
  51         {
  52             return adoptRef(new WorkerContext(url, userAgent, thread));
  53         }
  54
  55         virtual ~WorkerContext();
  56
  57         virtual bool isWorkerContext() const { return true; }
  58
  59         virtual ScriptExecutionContext* scriptExecutionContext() const;
  60
  61         const KURL& url() const { return m_url; }
  62         KURL completeURL(const String&) const;
  63
  64         WorkerLocation* location() const { return m_location.get(); }
  65         WorkerNavigator* navigator() const;
  66
  67         WorkerScriptController* script() { return m_script.get(); }
  68         void clearScript() { return m_script.clear(); }
  69         WorkerThread* thread() { return m_thread; }
  70
  71         bool hasPendingActivity() const;
  72
  73         virtual void reportException(const String& errorMessage, int lineNumber, const String& sourceURL);
  74         virtual void addMessage(MessageDestination, MessageSource, MessageLevel, const String& message, unsigned lineNumber, const String& sourceURL);
  75         virtual void resourceRetrievedByXMLHttpRequest(unsigned long identifier, const ScriptString& sourceString);
  76
  77         virtual WorkerContext* toWorkerContext() { return this; }
  78
  79         void postMessage(const String& message);
  80         virtual void postTask(PassRefPtr<Task>); // Executes the task on context's thread asynchronously.
  81         void postTaskToParentContext(PassRefPtr<Task>); // Executes the task in the parent's context (and thread) asynchronously.
  82
  83         virtual void addEventListener(const AtomicString& eventType, PassRefPtr<EventListener>, bool useCapture);
  84         virtual void removeEventListener(const AtomicString& eventType, EventListener*, bool useCapture);
  85         virtual bool dispatchEvent(PassRefPtr<Event>, ExceptionCode&);
  86
  87         void setOnmessage(PassRefPtr<EventListener> eventListener) { m_onmessageListener = eventListener; }
  88         EventListener* onmessage() const { return m_onmessageListener.get(); }
  89
  90         typedef Vector<RefPtr<EventListener> > ListenerVector;
  91         typedef HashMap<AtomicString, ListenerVector> EventListenersMap;
  92         EventListenersMap& eventListeners() { return m_eventListeners; }
  93
  94         using RefCounted<WorkerContext>::ref;
  95         using RefCounted<WorkerContext>::deref;
  96
  97     private:
  98         virtual void refScriptExecutionContext() { ref(); }
  99         virtual void derefScriptExecutionContext() { deref(); }
 100         virtual void refEventTarget() { ref(); }
 101         virtual void derefEventTarget() { deref(); }
 102
 103         WorkerContext(const KURL&, const String&, WorkerThread*);
 104
 105         virtual const KURL& virtualURL() const;
 106         virtual KURL virtualCompleteURL(const String&) const;
 107
 108         KURL m_url;
 109         String m_userAgent;
 110         RefPtr<WorkerLocation> m_location;
 111         mutable RefPtr<WorkerNavigator> m_navigator;
 112
 113         OwnPtr<WorkerScriptController> m_script;
 114         WorkerThread* m_thread;
 115
 116         RefPtr<EventListener> m_onmessageListener;
 117         EventListenersMap m_eventListeners;
 118     };
 119
 120 } // namespace WebCore
 121
 122 #endif // ENABLE(WORKERS)
 123
 124 #endif // WorkerContext_h