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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
      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 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 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 #ifndef DocumentLifecycleNotifier_h
     27 #define DocumentLifecycleNotifier_h
     28 
     29 #include "core/dom/DocumentLifecycleObserver.h"
     30 #include "wtf/PassOwnPtr.h"
     31 #include "wtf/TemporaryChange.h"
     32 
     33 namespace WebCore {
     34 
     35 class Document;
     36 
     37 class DocumentLifecycleNotifier : public LifecycleNotifier<Document> {
     38 public:
     39     static PassOwnPtr<DocumentLifecycleNotifier> create(Document*);
     40 
     41     void notifyDocumentWasDetached();
     42     void notifyDocumentWasDisposed();
     43 
     44     virtual void addObserver(Observer*) OVERRIDE;
     45     virtual void removeObserver(Observer*) OVERRIDE;
     46 
     47 private:
     48     explicit DocumentLifecycleNotifier(Document*);
     49 
     50     typedef HashSet<DocumentLifecycleObserver*> DocumentObserverSet;
     51     DocumentObserverSet m_documentObservers;
     52 };
     53 
     54 inline PassOwnPtr<DocumentLifecycleNotifier> DocumentLifecycleNotifier::create(Document* document)
     55 {
     56     return adoptPtr(new DocumentLifecycleNotifier(document));
     57 }
     58 
     59 inline void DocumentLifecycleNotifier::notifyDocumentWasDetached()
     60 {
     61     TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverDocumentObservers);
     62     for (DocumentObserverSet::iterator i = m_documentObservers.begin(); i != m_documentObservers.end(); ++i)
     63         (*i)->documentWasDetached();
     64 }
     65 
     66 inline void DocumentLifecycleNotifier::notifyDocumentWasDisposed()
     67 {
     68     TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverDocumentObservers);
     69     for (DocumentObserverSet::iterator i = m_documentObservers.begin(); i != m_documentObservers.end(); ++i)
     70         (*i)->documentWasDisposed();
     71 }
     72 
     73 } // namespace WebCore
     74 
     75 #endif // DocumentLifecycleNotifier_h
     76