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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/dom/Document.h"
     35 #include "core/frame/LocalDOMWindow.h"
     36 #include "core/frame/LocalFrame.h"
     37 #include "modules/quota/DeprecatedStorageInfo.h"
     38 #include "wtf/PassRefPtr.h"
     39 
     40 namespace WebCore {
     41 
     42 DOMWindowQuota::DOMWindowQuota(LocalDOMWindow& window)
     43     : DOMWindowProperty(window.frame())
     44 {
     45 }
     46 
     47 DOMWindowQuota::~DOMWindowQuota()
     48 {
     49 }
     50 
     51 const char* DOMWindowQuota::supplementName()
     52 {
     53     return "DOMWindowQuota";
     54 }
     55 
     56 // static
     57 DOMWindowQuota& DOMWindowQuota::from(LocalDOMWindow& window)
     58 {
     59     DOMWindowQuota* supplement = static_cast<DOMWindowQuota*>(WillBeHeapSupplement<LocalDOMWindow>::from(window, supplementName()));
     60     if (!supplement) {
     61         supplement = new DOMWindowQuota(window);
     62         provideTo(window, supplementName(), adoptPtrWillBeNoop(supplement));
     63     }
     64     return *supplement;
     65 }
     66 
     67 // static
     68 DeprecatedStorageInfo* DOMWindowQuota::webkitStorageInfo(LocalDOMWindow& window)
     69 {
     70     return DOMWindowQuota::from(window).webkitStorageInfo();
     71 }
     72 
     73 DeprecatedStorageInfo* DOMWindowQuota::webkitStorageInfo() const
     74 {
     75     if (!m_storageInfo && frame())
     76         m_storageInfo = DeprecatedStorageInfo::create();
     77     return m_storageInfo.get();
     78 }
     79 
     80 void DOMWindowQuota::trace(Visitor* visitor)
     81 {
     82     visitor->trace(m_storageInfo);
     83     WillBeHeapSupplement<LocalDOMWindow>::trace(visitor);
     84 }
     85 
     86 } // namespace WebCore
     87