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      1 /*
      2  * Copyright (C) 2012 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
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 #include "modules/quota/DOMWindowQuota.h"
     33 
     34 #include "core/frame/LocalDOMWindow.h"
     35 #include "core/frame/LocalFrame.h"
     36 #include "modules/quota/DeprecatedStorageInfo.h"
     37 #include "wtf/PassRefPtr.h"
     38 
     39 namespace blink {
     40 
     41 DOMWindowQuota::DOMWindowQuota(LocalDOMWindow& window)
     42     : DOMWindowProperty(window.frame())
     43 {
     44 }
     45 
     46 DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(DOMWindowQuota);
     47 
     48 const char* DOMWindowQuota::supplementName()
     49 {
     50     return "DOMWindowQuota";
     51 }
     52 
     53 // static
     54 DOMWindowQuota& DOMWindowQuota::from(LocalDOMWindow& window)
     55 {
     56     DOMWindowQuota* supplement = static_cast<DOMWindowQuota*>(WillBeHeapSupplement<LocalDOMWindow>::from(window, supplementName()));
     57     if (!supplement) {
     58         supplement = new DOMWindowQuota(window);
     59         provideTo(window, supplementName(), adoptPtrWillBeNoop(supplement));
     60     }
     61     return *supplement;
     62 }
     63 
     64 // static
     65 DeprecatedStorageInfo* DOMWindowQuota::webkitStorageInfo(LocalDOMWindow& window)
     66 {
     67     return DOMWindowQuota::from(window).webkitStorageInfo();
     68 }
     69 
     70 DeprecatedStorageInfo* DOMWindowQuota::webkitStorageInfo() const
     71 {
     72     if (!m_storageInfo && frame())
     73         m_storageInfo = DeprecatedStorageInfo::create();
     74     return m_storageInfo.get();
     75 }
     76 
     77 void DOMWindowQuota::trace(Visitor* visitor)
     78 {
     79     visitor->trace(m_storageInfo);
     80     WillBeHeapSupplement<LocalDOMWindow>::trace(visitor);
     81     DOMWindowProperty::trace(visitor);
     82 }
     83 
     84 } // namespace blink
     85