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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 blink {
     34 
     35 class Document;
     36 
     37 class DocumentLifecycleNotifier : public LifecycleNotifier<Document> {
     38 public:
     39     static PassOwnPtr<DocumentLifecycleNotifier> create(Document*);
     40 
     41     void notifyDocumentWasDetached();
     42 #if !ENABLE(OILPAN)
     43     void notifyDocumentWasDisposed();
     44 #endif
     45 
     46     virtual void addObserver(Observer*) OVERRIDE FINAL;
     47     virtual void removeObserver(Observer*) OVERRIDE FINAL;
     48 
     49 private:
     50     explicit DocumentLifecycleNotifier(Document*);
     51 
     52     typedef HashSet<DocumentLifecycleObserver*> DocumentObserverSet;
     53     DocumentObserverSet m_documentObservers;
     54 };
     55 
     56 inline PassOwnPtr<DocumentLifecycleNotifier> DocumentLifecycleNotifier::create(Document* document)
     57 {
     58     return adoptPtr(new DocumentLifecycleNotifier(document));
     59 }
     60 
     61 inline void DocumentLifecycleNotifier::notifyDocumentWasDetached()
     62 {
     63     TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverDocumentObservers);
     64     for (DocumentObserverSet::iterator i = m_documentObservers.begin(); i != m_documentObservers.end(); ++i)
     65         (*i)->documentWasDetached();
     66 }
     67 
     68 #if !ENABLE(OILPAN)
     69 inline void DocumentLifecycleNotifier::notifyDocumentWasDisposed()
     70 {
     71     TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverDocumentObservers);
     72     for (DocumentObserverSet::iterator i = m_documentObservers.begin(); i != m_documentObservers.end(); ++i)
     73         (*i)->documentWasDisposed();
     74 }
     75 #endif
     76 
     77 } // namespace blink
     78 
     79 #endif // DocumentLifecycleNotifier_h
     80