Account for old versions of Pygments

[lyx.git] / src / Server.h

diff --git a/src/Server.h b/src/Server.h
index 7acee1a5c5f61f88020802a6d7b7b37bb15ecd56..40021daa414c14bf82f15b36bc2ab1c60f48e3e5 100644 (file)
--- a/src/Server.h
+++ b/src/Server.h
@@ -4,8 +4,9 @@
  * This file is part of LyX, the document processor.
  * Licence details can be found in the file COPYING.
  *
- * \author Lars Gullik Bjønnes
+ * \author Lars Gullik Bjønnes
  * \author Jean-Marc Lasgouttes
+ * \author Enrico Forestieri
  *
  * Full author contact details are available in file CREDITS.
  */
@@ -13,23 +14,69 @@
 #ifndef SERVER_H
 #define SERVER_H
 
-#include <boost/signals/trackable.hpp>
+#include "support/signals.h"
+
+#include <vector>
+
+#ifdef _WIN32
+#include <windows.h>
+#include <QObject>
+#include <QEvent>
+#endif
 
 
 namespace lyx {
 
-class LyXFunc;
 class Server;
 
 
-/** This class managed the pipes used for communicating with clients.
+/** This class manages 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 string interface.
  */
-class LyXComm : public boost::signals::trackable {
+#ifndef _WIN32
+class LyXComm {
+#else
+class LyXComm : public QObject {
+       Q_OBJECT
+
+       friend DWORD WINAPI pipeServerWrapper(void *);
+
+public:
+       /// Max number of clients
+       enum { MAX_CLIENTS = 10 };
+
+private:
+       /// Max number of pipe instances
+       enum { MAX_PIPES = 2 * MAX_CLIENTS };
+
+       /// I/O buffer size
+       enum { PIPE_BUFSIZE = 512 };
+
+       /// Pipe client time-out
+       enum { PIPE_TIMEOUT = 5000 };
+
+       /// Pipe states
+       enum PipeState {
+               CONNECTING_STATE,
+               READING_STATE,
+               WRITING_STATE
+       };
+
+       /// Pipe instances
+       typedef struct {
+               OVERLAPPED overlap;
+               HANDLE handle;
+               std::string iobuf;
+               char readbuf[PIPE_BUFSIZE];
+               DWORD nbytes;
+               PipeState state;
+               bool pending_io;
+       } PipeInst;
+#endif
 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
@@ -50,7 +97,14 @@ public:
        void send(std::string const &);
 
        /// asynch ready-to-be-read notification
+#ifndef _WIN32
        void read_ready();
+#else
+       void read_ready(DWORD);
+#endif
+
+       /// Tell whether we asked another instance of LyX to open the files
+       bool deferredLoading() { return deferred_loading_; }
 
 private:
        /// the filename of the in pipe
@@ -65,6 +119,10 @@ private:
        /// Close pipes
        void closeConnection();
 
+       /// Load files in another running instance of LyX
+       bool loadFilesInOtherInstance();
+
+#ifndef _WIN32
        /// start a pipe
        int startPipe(std::string const &, bool);
 
@@ -76,6 +134,46 @@ private:
 
        /// This is -1 if not open
        int outfd_;
+#else
+       /// The pipe server returns false when exiting due to an error
+       bool pipeServer();
+
+       /// Start an overlapped connection
+       bool startPipe(DWORD);
+
+       /// Reset an overlapped connection
+       bool resetPipe(DWORD, bool close_handle = false);
+
+       /// Close event and pipe handles
+       void closeHandles();
+
+       /// Catch pipe ready-to-be-read notification
+       bool event(QEvent *);
+
+       /// Check whether the pipe server must be stopped
+       bool checkStopServer(DWORD timeout = 0);
+
+       /// The filename of a (in or out) pipe instance
+       std::string const pipeName(DWORD) const;
+
+       /// Pipe instances
+       PipeInst pipe_[MAX_PIPES];
+
+       /// Pipe server control events
+       HANDLE event_[MAX_PIPES + 1];
+
+       /// Reply buffer
+       std::string outbuf_;
+
+       /// Synchronize access to outbuf_
+       HANDLE outbuf_mutex_;
+
+       /// Windows event for stopping the pipe server
+       HANDLE stopserver_;
+
+       /// Pipe server thread handle
+       HANDLE server_thread_;
+#endif
 
        /// Are we up and running?
        bool ready_;
@@ -88,6 +186,12 @@ private:
 
        /// The client callback function
        ClientCallbackfct clientcb_;
+
+       /// Did we defer loading of files to another instance?
+       bool deferred_loading_;
+
+       /// Track object's liveness
+       support::Trackable tracker_;
 };
 
 
@@ -97,19 +201,18 @@ 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)
        ///
-       Server(LyXFunc * f, std::string const & pip);
+       Server(std::string const & pip);
        ///
        ~Server();
        ///
        void notifyClient(std::string const &);
+       ///
+       bool deferredLoadingToOtherInstance() { return pipes_.deferredLoading(); }
 
        /// whilst crashing etc.
        void emergencyCleanup() { pipes_.emergencyCleanup(); }
@@ -118,19 +221,24 @@ public:
 
 private:
        /// Names and number of current clients
+#ifndef _WIN32
        enum { MAX_CLIENTS = 10 };
+#else
+       enum { MAX_CLIENTS = LyXComm::MAX_CLIENTS };
+#endif
        ///
        std::string clients_[MAX_CLIENTS];
        ///
        int numclients_;
        ///
-       LyXFunc * func_;
-       ///
        LyXComm pipes_;
 };
 
 /// Implementation is in LyX.cpp
-extern Server & theServer();
+Server & theServer();
+
+/// Implementation is in LyX.cpp
+extern std::vector<std::string> & theFilesToLoad();
 
 
 } // namespace lyx