src/lyxsocket.h

   1 // -*- C++ -*-
   2 /**
   3  * \file lyxsocket.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 LYXSOCKET_H
  15 #define LYXSOCKET_H
  16
  17 #include "support/socktools.h"
  18 #include "lyxfunc.h"
  19
  20 #include <boost/shared_ptr.hpp>
  21
  22 #include <string>
  23 #include <map>
  24
  25 class LyXServerSocket;
  26 class LyXDataSocket;
  27
  28
  29 /** Sockets can be in two states: listening and connected.
  30  *  Connected sockets are used to transfer data, and will therefore
  31  *  be called Data Sockets. Listening sockets are used to create
  32  *  Data Sockets when clients connect, and therefore will be called
  33  * Server Sockets.
  34
  35  * This class encapsulates local (unix) server socket operations and
  36  * manages LyXDataSockets objects that are created when clients connect.
  37  */
  38 class LyXServerSocket {
  39 public:
  40         ///
  41         LyXServerSocket(LyXFunc *, std::string const &);
  42         ///
  43         ~LyXServerSocket();
  44         /// Address of the local socket
  45         std::string const & address() const;
  46         /// To be called when there is activity in the server socket
  47         void serverCallback();
  48         /// To be called when there is activity in the data socket
  49         void dataCallback(int fd);
  50 private:
  51         ///
  52         void writeln(std::string const &);
  53         ///
  54         LyXFunc * func;
  55         /// File descriptor for the server socket
  56         int fd_;
  57         /// Stores the socket filename
  58         std::string address_;
  59         /// Maximum number of simultaneous clients
  60         enum {
  61                 MAX_CLIENTS = 10
  62         };
  63         /// All connections
  64         std::map<int, boost::shared_ptr<LyXDataSocket> > clients;
  65 };
  66
  67
  68 /** This class encapsulates data socket operations.
  69  *  It provides read and write IO operations on the socket.
  70  */
  71 class LyXDataSocket {
  72 public:
  73         ///
  74         LyXDataSocket(int fd);
  75         ///
  76         ~LyXDataSocket();
  77         /// Connection status
  78         bool connected() const;
  79         /// Line buffered input from the socket
  80         bool readln(std::string &);
  81         /// Write the string + '\n' to the socket
  82         void writeln(std::string const &);
  83 private:
  84         /// File descriptor for the data socket
  85         int fd_;
  86         /// True if the connection is up
  87         bool connected_;
  88         /// buffer for input data
  89         std::string buffer_;
  90 };
  91
  92 #endif // LYXSOCKET_H