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      1 /*
      2  * Copyright (C) 2011, 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 met:
      6  *
      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 GOOGLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
     14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     16  * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
     17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     19  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
     20  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
     23  * DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "modules/indexeddb/DOMWindowIndexedDatabase.h"
     28 
     29 #include "core/dom/Document.h"
     30 #include "core/page/DOMWindow.h"
     31 #include "core/page/Page.h"
     32 #include "modules/indexeddb/IDBFactory.h"
     33 #include "modules/indexeddb/PageGroupIndexedDatabase.h"
     34 
     35 namespace WebCore {
     36 
     37 DOMWindowIndexedDatabase::DOMWindowIndexedDatabase(DOMWindow* window)
     38     : DOMWindowProperty(window->frame())
     39     , m_window(window)
     40 {
     41 }
     42 
     43 DOMWindowIndexedDatabase::~DOMWindowIndexedDatabase()
     44 {
     45 }
     46 
     47 const char* DOMWindowIndexedDatabase::supplementName()
     48 {
     49     return "DOMWindowIndexedDatabase";
     50 }
     51 
     52 DOMWindowIndexedDatabase* DOMWindowIndexedDatabase::from(DOMWindow* window)
     53 {
     54     DOMWindowIndexedDatabase* supplement = static_cast<DOMWindowIndexedDatabase*>(Supplement<DOMWindow>::from(window, supplementName()));
     55     if (!supplement) {
     56         supplement = new DOMWindowIndexedDatabase(window);
     57         provideTo(window, supplementName(), adoptPtr(supplement));
     58     }
     59     return supplement;
     60 }
     61 
     62 void DOMWindowIndexedDatabase::willDestroyGlobalObjectInFrame()
     63 {
     64     m_idbFactory = nullptr;
     65     DOMWindowProperty::willDestroyGlobalObjectInFrame();
     66 }
     67 
     68 void DOMWindowIndexedDatabase::willDetachGlobalObjectFromFrame()
     69 {
     70     m_idbFactory = nullptr;
     71     DOMWindowProperty::willDetachGlobalObjectFromFrame();
     72 }
     73 
     74 IDBFactory* DOMWindowIndexedDatabase::indexedDB(DOMWindow* window)
     75 {
     76     return from(window)->indexedDB();
     77 }
     78 
     79 IDBFactory* DOMWindowIndexedDatabase::indexedDB()
     80 {
     81     Document* document = m_window->document();
     82     if (!document)
     83         return 0;
     84 
     85     Page* page = document->page();
     86     if (!page)
     87         return 0;
     88 
     89     if (!m_window->isCurrentlyDisplayedInFrame())
     90         return 0;
     91 
     92     if (!m_idbFactory)
     93         m_idbFactory = IDBFactory::create(PageGroupIndexedDatabase::from(page->group())->factoryBackend());
     94     return m_idbFactory.get();
     95 }
     96 
     97 } // namespace WebCore
     98