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Datei: lyxserver.h Sprache: C

Original von: Lyx^©

// -*- C++ -*-
/* This file is part of
* ======================================================
*
*           LyX, The Document Processor
*
*           Copyright (C) 1995 Matthias Ettrich
*           Copyright (C) 1995-1998 The LyX Team.
*
*======================================================*/

#ifndef _LYXSERVER_H_
#define _LYXSERVER_H_

#ifdef __GNUG__
#pragma interface
#endif

#include "LString.h"
class LyXFunc;
class LyXServer;

/* --- i/o pipes --------------------------------------------------------- */

/** This class managed the pipes used for communicating with clients.
Usage: Initialize with pipe-filename-base, client class to receive
messages, and callback-function that will be called with the messages.
When you want to send, use "send()".
This class encapsulates all the dirty communication and thus provides
a clean LString interface.
*/
class LyXComm
{
public:
/** When we receive a message, we send it to a client.
  This is one of the small things that would have been a lot
  cleaner with a Signal/Slot thing.
*/
typedef void (*ClientCallbackfct)(LyXServer *, LString const &);

/// Construct with pipe-basename and callback to receive messages
LyXComm(LString const &pip, LyXServer * cli, ClientCallbackfct ccb = 0)
  :pipename(pip), client(cli), clientcb(ccb)
{
  ready = false;
  openConnection();
}

///
~LyXComm() {
  closeConnection();
}

/// Send message
void send(LString const &);
private:
/// Open pipes
void openConnection();

/// Close pipes
void closeConnection();

/// We receive messages via XForms through this callback
static void callback(int fd, void *v);

/// This is -1 if not open
int infd;

/// This is -1 if not open
int outfd;

/// Are we up and running?
bool ready;

/// Base of pipename including path
LString pipename;

/// The client
LyXServer * client;

/// The client callback function
ClientCallbackfct clientcb;
};

/* --- prototypes -------------------------------------------------------- */
class LyXServer
{
public:
// FIXME IN 0.13
// Hack! This should be changed in 0.13

/// The lyx server should not take an argument "LyXFunc" but this is
// how it will be done for 0.12. In 0.13 we must write a non-gui
// bufferview.
        // IMO lyxserver is atypical, and for the moment the only one, non-gui
        // bufferview. We just have to find a way to handle situations like if
        // lyxserver is using a buffer that is being edited with a bufferview.
        // With a common buffer list this is not a problem, maybe. (Alejandro)
LyXServer(LyXFunc *f, LString const &pip)
  : clients(0), func(f), pipes(pip, (this), callback)
{ }
        ///
~LyXServer();
///
void notifyClient(LString const &);
private:
///
static void callback(LyXServer *, LString const & msg);
/// Number of current clients
int clients;
///
LyXFunc *func;
///
LyXComm pipes;
};

#endif /* _LYXSERVER_H_ */

/* === End of File: lyxserver.h ========================================== */

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