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      1 /*
      2  * Copyright (C) 2009 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 #ifndef ThreadableWebSocketChannelClientWrapper_h
     32 #define ThreadableWebSocketChannelClientWrapper_h
     33 
     34 #if ENABLE(WEB_SOCKETS)
     35 
     36 #include "PlatformString.h"
     37 #include "WebSocketChannelClient.h"
     38 #include <wtf/Forward.h>
     39 #include <wtf/PassRefPtr.h>
     40 #include <wtf/Threading.h>
     41 #include <wtf/Vector.h>
     42 
     43 namespace WebCore {
     44 
     45 class ThreadableWebSocketChannelClientWrapper : public ThreadSafeRefCounted<ThreadableWebSocketChannelClientWrapper> {
     46 public:
     47     static PassRefPtr<ThreadableWebSocketChannelClientWrapper> create(WebSocketChannelClient* client)
     48     {
     49         return adoptRef(new ThreadableWebSocketChannelClientWrapper(client));
     50     }
     51 
     52     void clearSyncMethodDone()
     53     {
     54         m_syncMethodDone = false;
     55     }
     56     void setSyncMethodDone()
     57     {
     58         m_syncMethodDone = true;
     59     }
     60 
     61     bool syncMethodDone() const
     62     {
     63         return m_syncMethodDone;
     64     }
     65 
     66     bool sent() const
     67     {
     68         return m_sent;
     69     }
     70     void setSent(bool sent)
     71     {
     72         m_sent = sent;
     73         m_syncMethodDone = true;
     74     }
     75 
     76     unsigned long bufferedAmount() const
     77     {
     78         return m_bufferedAmount;
     79     }
     80     void setBufferedAmount(unsigned long bufferedAmount)
     81     {
     82         m_bufferedAmount = bufferedAmount;
     83         m_syncMethodDone = true;
     84     }
     85 
     86     void clearClient()
     87     {
     88         m_client = 0;
     89     }
     90 
     91     void didConnect()
     92     {
     93         m_pendingConnected = true;
     94         if (!m_suspended)
     95             processPendingEvents();
     96     }
     97 
     98     void didReceiveMessage(const String& msg)
     99     {
    100         m_pendingMessages.append(msg);
    101         if (!m_suspended)
    102             processPendingEvents();
    103     }
    104 
    105     void didClose(unsigned long unhandledBufferedAmount)
    106     {
    107         m_pendingClosed = true;
    108         m_bufferedAmount = unhandledBufferedAmount;
    109         if (!m_suspended)
    110             processPendingEvents();
    111     }
    112 
    113     void suspend()
    114     {
    115         m_suspended = true;
    116     }
    117 
    118     void resume()
    119     {
    120         m_suspended = false;
    121         processPendingEvents();
    122     }
    123 
    124 protected:
    125     ThreadableWebSocketChannelClientWrapper(WebSocketChannelClient* client)
    126         : m_client(client)
    127         , m_syncMethodDone(false)
    128         , m_sent(false)
    129         , m_bufferedAmount(0)
    130         , m_suspended(false)
    131         , m_pendingConnected(false)
    132         , m_pendingClosed(false)
    133     {
    134     }
    135 
    136     void processPendingEvents()
    137     {
    138         ASSERT(!m_suspended);
    139         if (m_pendingConnected) {
    140             m_pendingConnected = false;
    141             if (m_client)
    142                 m_client->didConnect();
    143         }
    144 
    145         Vector<String> messages;
    146         messages.swap(m_pendingMessages);
    147         for (Vector<String>::const_iterator iter = messages.begin(); iter != messages.end(); ++iter) {
    148             if (m_client)
    149                 m_client->didReceiveMessage(*iter);
    150         }
    151 
    152         if (m_pendingClosed) {
    153             m_pendingClosed = false;
    154             if (m_client)
    155                 m_client->didClose(m_bufferedAmount);
    156         }
    157     }
    158 
    159     WebSocketChannelClient* m_client;
    160     bool m_syncMethodDone;
    161     bool m_sent;
    162     unsigned long m_bufferedAmount;
    163     bool m_suspended;
    164     bool m_pendingConnected;
    165     Vector<String> m_pendingMessages;
    166     bool m_pendingClosed;
    167 };
    168 
    169 } // namespace WebCore
    170 
    171 #endif // ENABLE(WEB_SOCKETS)
    172 
    173 #endif // ThreadableWebSocketChannelClientWrapper_h
    174