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      1 /*
      2  * Copyright (C) 2010 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 "UserMessageCoders.h"
     27 #include "WebContext.h"
     28 #include "WebFrameProxy.h"
     29 #include "WebPageGroup.h"
     30 #include "WebPageGroupData.h"
     31 #include "WebPageProxy.h"
     32 
     33 namespace WebKit {
     34 
     35 // Adds
     36 // - Page -> BundlePage
     37 // - Frame -> BundleFrame
     38 // - PageGroup -> BundlePageGroup
     39 
     40 class WebContextUserMessageEncoder : public UserMessageEncoder<WebContextUserMessageEncoder> {
     41 public:
     42     typedef UserMessageEncoder<WebContextUserMessageEncoder> Base;
     43 
     44     WebContextUserMessageEncoder(APIObject* root)
     45         : Base(root)
     46     {
     47     }
     48 
     49     void encode(CoreIPC::ArgumentEncoder* encoder) const
     50     {
     51         APIObject::Type type = APIObject::TypeNull;
     52         if (baseEncode(encoder, type))
     53             return;
     54 
     55         switch (type) {
     56         case APIObject::TypePage: {
     57             WebPageProxy* page = static_cast<WebPageProxy*>(m_root);
     58             encoder->encode(page->pageID());
     59             break;
     60         }
     61         case APIObject::TypeFrame: {
     62             WebFrameProxy* frame = static_cast<WebFrameProxy*>(m_root);
     63             encoder->encode(frame->frameID());
     64             break;
     65         }
     66         case APIObject::TypePageGroup: {
     67             WebPageGroup* pageGroup = static_cast<WebPageGroup*>(m_root);
     68             encoder->encode(pageGroup->data());
     69             break;
     70         }
     71         default:
     72             ASSERT_NOT_REACHED();
     73             break;
     74         }
     75     }
     76 };
     77 
     78 // Adds
     79 //   - Page -> BundlePage
     80 //   - Frame -> BundleFrame
     81 //   - PageGroup -> BundlePageGroup
     82 
     83 class WebContextUserMessageDecoder : public UserMessageDecoder<WebContextUserMessageDecoder> {
     84 public:
     85     typedef UserMessageDecoder<WebContextUserMessageDecoder> Base;
     86 
     87     WebContextUserMessageDecoder(RefPtr<APIObject>& root, WebContext* context)
     88         : Base(root)
     89         , m_context(context)
     90     {
     91     }
     92 
     93     WebContextUserMessageDecoder(WebContextUserMessageDecoder& userMessageDecoder, RefPtr<APIObject>& root)
     94         : Base(root)
     95         , m_context(userMessageDecoder.m_context)
     96     {
     97     }
     98 
     99     static bool decode(CoreIPC::ArgumentDecoder* decoder, WebContextUserMessageDecoder& coder)
    100     {
    101         APIObject::Type type = APIObject::TypeNull;
    102         if (!Base::baseDecode(decoder, coder, type))
    103             return false;
    104 
    105         if (coder.m_root || type == APIObject::TypeNull)
    106             return true;
    107 
    108         switch (type) {
    109         case APIObject::TypeBundlePage: {
    110             uint64_t pageID;
    111             if (!decoder->decode(pageID))
    112                 return false;
    113             coder.m_root = coder.m_context->process()->webPage(pageID);
    114             break;
    115         }
    116         case APIObject::TypeBundleFrame: {
    117             uint64_t frameID;
    118             if (!decoder->decode(frameID))
    119                 return false;
    120             coder.m_root = coder.m_context->process()->webFrame(frameID);
    121             break;
    122         }
    123         case APIObject::TypeBundlePageGroup: {
    124             uint64_t pageGroupID;
    125             if (!decoder->decode(pageGroupID))
    126                 return false;
    127             coder.m_root = WebPageGroup::get(pageGroupID);
    128             break;
    129         }
    130         default:
    131             return false;
    132         }
    133 
    134         return true;
    135     }
    136 
    137 private:
    138     WebContext* m_context;
    139 };
    140 
    141 } // namespace WebKit
    142