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      1 /*
      2  * libjingle
      3  * Copyright 2004--2013, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #ifndef TALK_EXAMPLES_CHAT_CONSOLETASK_H_
     29 #define TALK_EXAMPLES_CHAT_CONSOLETASK_H_
     30 
     31 #include <cstdio>
     32 
     33 #include "talk/base/thread.h"
     34 #include "talk/base/sigslot.h"
     35 
     36 namespace buzz {
     37 
     38 //
     39 // Provides properly threaded console I/O.
     40 //
     41 class ConsoleTask : public talk_base::MessageHandler {
     42  public:
     43   // Arguments:
     44   // thread The main application thread.  Input messages get posted through
     45   //   this.
     46   explicit ConsoleTask(talk_base::Thread *thread);
     47 
     48   // Shuts down the thread associated with this task.
     49   ~ConsoleTask();
     50 
     51   // Slot for text inputs handler.
     52   sigslot::signal1<const std::string&> TextInputHandler;
     53 
     54   // Starts reading lines from the console and passes them to the
     55   //  TextInputHandler.
     56   void Start();
     57 
     58   // Stops reading lines and shuts down the thread.  Cannot be restarted.
     59   void Stop();
     60 
     61   // Thread messages (especialy text-input messages) come in through here.
     62   virtual void OnMessage(talk_base::Message *msg);
     63 
     64   // printf() style output to the console.
     65   void Print(const char* format, ...);
     66 
     67   // Turns on/off the echo of input characters on the console.
     68   // Arguments:
     69   //   on If true turns echo on, off otherwise.
     70   static void SetEcho(bool on);
     71 
     72  private:
     73   /** Message IDs (for OnMessage()). */
     74   enum {
     75     MSG_START,
     76     MSG_INPUT,
     77   };
     78 
     79   // Starts up polling for console input
     80   void RunConsole();
     81 
     82   // The main application thread
     83   talk_base::Thread *client_thread_;
     84 
     85   // The tread associated with this console object
     86   talk_base::scoped_ptr<talk_base::Thread> console_thread_;
     87 };
     88 
     89 }  // namespace buzz
     90 
     91 #endif  // TALK_EXAMPLES_CHAT_CONSOLETASK_H_
     92 
     93