src/third_party/WebKit/Source/modules/indexeddb/DOMWindowIndexedDatabase.cpp

   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/frame/LocalDOMWindow.h"
  31 #include "core/page/Page.h"
  32 #include "modules/indexeddb/IDBFactory.h"
  33
  34 namespace blink {
  35
  36 DOMWindowIndexedDatabase::DOMWindowIndexedDatabase(LocalDOMWindow& window)
  37     : DOMWindowProperty(window.frame())
  38     , m_window(window)
  39 {
  40 }
  41
  42 DOMWindowIndexedDatabase::~DOMWindowIndexedDatabase()
  43 {
  44 }
  45
  46 void DOMWindowIndexedDatabase::trace(Visitor* visitor)
  47 {
  48     visitor->trace(m_idbFactory);
  49     WillBeHeapSupplement<LocalDOMWindow>::trace(visitor);
  50 }
  51
  52 const char* DOMWindowIndexedDatabase::supplementName()
  53 {
  54     return "DOMWindowIndexedDatabase";
  55 }
  56
  57 DOMWindowIndexedDatabase& DOMWindowIndexedDatabase::from(LocalDOMWindow& window)
  58 {
  59     DOMWindowIndexedDatabase* supplement = static_cast<DOMWindowIndexedDatabase*>(WillBeHeapSupplement<LocalDOMWindow>::from(window, supplementName()));
  60     if (!supplement) {
  61         supplement = new DOMWindowIndexedDatabase(window);
  62         provideTo(window, supplementName(), adoptPtrWillBeNoop(supplement));
  63     }
  64     return *supplement;
  65 }
  66
  67 void DOMWindowIndexedDatabase::willDestroyGlobalObjectInFrame()
  68 {
  69     m_idbFactory = nullptr;
  70     DOMWindowProperty::willDestroyGlobalObjectInFrame();
  71 }
  72
  73 void DOMWindowIndexedDatabase::willDetachGlobalObjectFromFrame()
  74 {
  75     m_idbFactory = nullptr;
  76     DOMWindowProperty::willDetachGlobalObjectFromFrame();
  77 }
  78
  79 IDBFactory* DOMWindowIndexedDatabase::indexedDB(LocalDOMWindow& window)
  80 {
  81     return from(window).indexedDB();
  82 }
  83
  84 IDBFactory* DOMWindowIndexedDatabase::indexedDB()
  85 {
  86     Document* document = m_window.document();
  87     if (!document)
  88         return 0;
  89
  90     Page* page = document->page();
  91     if (!page)
  92         return 0;
  93
  94     if (!m_window.isCurrentlyDisplayedInFrame())
  95         return 0;
  96
  97     if (!m_idbFactory)
  98         m_idbFactory = IDBFactory::create(IndexedDBClient::create());
  99     return m_idbFactory.get();
 100 }
 101
 102 } // namespace blink