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      1 /*
      2  * Copyright (C) 2011 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. AND ITS CONTRIBUTORS ``AS IS''
     14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
     17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     23  * THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "SessionState.h"
     28 
     29 namespace CoreIPC {
     30 
     31 // This assumes that when we encode a RefPtr we want to encode the object it points to and it is never null.
     32 template<typename T> struct ArgumentCoder<RefPtr<T> > {
     33     static void encode(ArgumentEncoder* encoder, const RefPtr<T>& item)
     34     {
     35         item->encode(*encoder);
     36     }
     37 
     38     static bool decode(ArgumentDecoder* decoder, RefPtr<T>& item)
     39     {
     40         item = T::decode(*decoder);
     41         return item;
     42     }
     43 };
     44 
     45 } // namespace CoreIPC
     46 
     47 namespace WebKit {
     48 
     49 SessionState::SessionState()
     50     : m_currentIndex(0)
     51 {
     52 }
     53 
     54 SessionState::SessionState(const BackForwardListItemVector& list, uint32_t currentIndex)
     55     : m_list(list)
     56     , m_currentIndex(currentIndex)
     57 {
     58 }
     59 
     60 bool SessionState::isEmpty() const
     61 {
     62     // Because this might change later, callers should use this instead of
     63     // calling list().isEmpty() directly themselves.
     64     return m_list.isEmpty();
     65 }
     66 
     67 void SessionState::encode(CoreIPC::ArgumentEncoder* encoder) const
     68 {
     69     encoder->encode(m_list);
     70     encoder->encode(m_currentIndex);
     71 }
     72 
     73 bool SessionState::decode(CoreIPC::ArgumentDecoder* decoder, SessionState& state)
     74 {
     75     if (!decoder->decode(state.m_list))
     76         return false;
     77     if (!decoder->decode(state.m_currentIndex))
     78         return false;
     79     return true;
     80 }
     81 
     82 } // namespace WebKit
     83