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      1 /*
      2  * Copyright (C) 2008 Apple 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 #include "config.h"
     27 #include "Storage.h"
     28 
     29 #if ENABLE(DOM_STORAGE)
     30 
     31 #include "Frame.h"
     32 #include "Page.h"
     33 #include "Settings.h"
     34 #include "StorageArea.h"
     35 #include "PlatformString.h"
     36 #include <wtf/PassRefPtr.h>
     37 
     38 namespace WebCore {
     39 
     40 PassRefPtr<Storage> Storage::create(Frame* frame, PassRefPtr<StorageArea> storageArea)
     41 {
     42     return adoptRef(new Storage(frame, storageArea));
     43 }
     44 
     45 Storage::Storage(Frame* frame, PassRefPtr<StorageArea> storageArea)
     46     : m_frame(frame)
     47     , m_storageArea(storageArea)
     48 {
     49     ASSERT(m_frame);
     50     ASSERT(m_storageArea);
     51 }
     52 
     53 Storage::~Storage()
     54 {
     55 }
     56 
     57 unsigned Storage::length() const
     58 {
     59     if (!m_frame || !m_frame->page() || m_frame->page()->settings()->privateBrowsingEnabled())
     60         return 0;
     61 
     62     return m_storageArea->length();
     63 }
     64 
     65 String Storage::key(unsigned index) const
     66 {
     67     if (!m_frame || !m_frame->page() || m_frame->page()->settings()->privateBrowsingEnabled())
     68         return String();
     69 
     70     return m_storageArea->key(index);
     71 }
     72 
     73 String Storage::getItem(const String& key) const
     74 {
     75     if (!m_frame || !m_frame->page() || m_frame->page()->settings()->privateBrowsingEnabled())
     76         return String();
     77 
     78     return m_storageArea->getItem(key);
     79 }
     80 
     81 void Storage::setItem(const String& key, const String& value, ExceptionCode& ec)
     82 {
     83     ec = 0;
     84     if (!m_frame)
     85         return;
     86 
     87     m_storageArea->setItem(key, value, ec, m_frame);
     88 }
     89 
     90 void Storage::removeItem(const String& key)
     91 {
     92     if (!m_frame)
     93         return;
     94 
     95     m_storageArea->removeItem(key, m_frame);
     96 }
     97 
     98 void Storage::clear()
     99 {
    100     if (!m_frame)
    101         return;
    102 
    103     m_storageArea->clear(m_frame);
    104 }
    105 
    106 bool Storage::contains(const String& key) const
    107 {
    108     if (!m_frame || !m_frame->page() || m_frame->page()->settings()->privateBrowsingEnabled())
    109         return false;
    110 
    111     return m_storageArea->contains(key);
    112 }
    113 
    114 }
    115 
    116 #endif // ENABLE(DOM_STORAGE)
    117