src/ServerSocket.h

   1 // -*- C++ -*-
   2 /**
   3  * \file ServerSocket.h
   4  * This file is part of LyX, the document processor.
   5  * Licence details can be found in the file COPYING.
   6  *
   7  * \author Lars Gullik Bjønnes
   8  * \author Jean-Marc Lasgouttes
   9  * \author João Luis M. Assirati
  10  *
  11  * Full author contact details are available in file CREDITS.
  12  */
  13
  14 #ifndef LYXSERVERSOCKET_H
  15 #define LYXSERVERSOCKET_H
  16
  17 #include "support/FileName.h"
  18 #include "support/socktools.h"
  19
  20 #include <boost/shared_ptr.hpp>
  21
  22 #include <string>
  23 #include <map>
  24
  25
  26 namespace lyx {
  27
  28 class LyXDataSocket;
  29 class LyXFunc;
  30
  31
  32 /** Sockets can be in two states: listening and connected.
  33  *  Connected sockets are used to transfer data, and will therefore
  34  *  be called Data Sockets. Listening sockets are used to create
  35  *  Data Sockets when clients connect, and therefore will be called
  36  * Server Sockets.
  37
  38  * This class encapsulates local (unix) server socket operations and
  39  * manages LyXDataSockets objects that are created when clients connect.
  40  */
  41 class ServerSocket {
  42 public:
  43         ///
  44         ServerSocket(LyXFunc *, support::FileName const &);
  45         ///
  46         ~ServerSocket();
  47         /// Address of the local socket
  48         std::string const address() const;
  49         /// To be called when there is activity in the server socket
  50         void serverCallback();
  51         /// To be called when there is activity in the data socket
  52         void dataCallback(int fd);
  53 private:
  54         ///
  55         void writeln(std::string const &);
  56         ///
  57         LyXFunc * func;
  58         /// File descriptor for the server socket
  59         int fd_;
  60         /// Stores the socket filename
  61         support::FileName address_;
  62         /// Maximum number of simultaneous clients
  63         enum {
  64                 MAX_CLIENTS = 10
  65         };
  66         /// All connections
  67         std::map<int, boost::shared_ptr<LyXDataSocket> > clients;
  68 };
  69
  70
  71 /** This class encapsulates data socket operations.
  72  *  It provides read and write IO operations on the socket.
  73  */
  74 class LyXDataSocket {
  75 public:
  76         ///
  77         LyXDataSocket(int fd);
  78         ///
  79         ~LyXDataSocket();
  80         /// Connection status
  81         bool connected() const;
  82         /// Line buffered input from the socket
  83         bool readln(std::string &);
  84         /// Write the string + '\n' to the socket
  85         void writeln(std::string const &);
  86 private:
  87         /// File descriptor for the data socket
  88         int fd_;
  89         /// True if the connection is up
  90         bool connected_;
  91         /// buffer for input data
  92         std::string buffer_;
  93 };
  94
  95 /// Implementation is in LyX.cpp
  96 extern ServerSocket & theServerSocket();
  97
  98
  99 } // namespace lyx
 100
 101 #endif // LYXSERVERSOCKET_H