include/wx/ipcbase.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        ipcbase.h
   3 // Purpose:     Base classes for IPC
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     4/1/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_IPCBASEH__
  13 #define _WX_IPCBASEH__
  14
  15 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  16 #pragma interface "ipcbase.h"
  17 #endif
  18
  19 #include "wx/defs.h"
  20 #include "wx/object.h"
  21 #include "wx/string.h"
  22
  23 enum wxIPCFormat
  24 {
  25   wxIPC_INVALID =          0,
  26   wxIPC_TEXT =             1,  /* CF_TEXT */
  27   wxIPC_BITMAP =           2,  /* CF_BITMAP */
  28   wxIPC_METAFILE =         3,  /* CF_METAFILEPICT */
  29   wxIPC_SYLK =             4,
  30   wxIPC_DIF =              5,
  31   wxIPC_TIFF =             6,
  32   wxIPC_OEMTEXT =          7,  /* CF_OEMTEXT */
  33   wxIPC_DIB =              8,  /* CF_DIB */
  34   wxIPC_PALETTE =          9,
  35   wxIPC_PENDATA =          10,
  36   wxIPC_RIFF =             11,
  37   wxIPC_WAVE =             12,
  38   wxIPC_UNICODETEXT =      13,
  39   wxIPC_ENHMETAFILE =      14,
  40   wxIPC_FILENAME =         15, /* CF_HDROP */
  41   wxIPC_LOCALE =           16,
  42   wxIPC_PRIVATE =          20
  43 };
  44
  45 class WXDLLIMPEXP_BASE wxServerBase;
  46 class WXDLLIMPEXP_BASE wxClientBase;
  47
  48 class WXDLLIMPEXP_BASE wxConnectionBase: public wxObject
  49 {
  50   DECLARE_CLASS(wxConnectionBase)
  51
  52 public:
  53   wxConnectionBase(wxChar *buffer, int size); // use external buffer
  54   wxConnectionBase(); // use internal, adaptive buffer
  55   wxConnectionBase(wxConnectionBase& copy);
  56   ~wxConnectionBase(void);
  57
  58   void SetConnected( bool c ) { m_connected = c; }
  59   bool GetConnected() { return m_connected; }
  60
  61   // Calls that CLIENT can make
  62   virtual bool Execute(const wxChar *data, int size = -1, wxIPCFormat format = wxIPC_TEXT ) = 0;
  63   virtual bool Execute(const wxString& str) { return Execute(str, -1, wxIPC_TEXT); }
  64   virtual wxChar *Request(const wxString& item, int *size = (int *) NULL, wxIPCFormat format = wxIPC_TEXT) = 0;
  65   virtual bool Poke(const wxString& item, wxChar *data, int size = -1, wxIPCFormat format = wxIPC_TEXT) = 0;
  66   virtual bool StartAdvise(const wxString& item) = 0;
  67   virtual bool StopAdvise(const wxString& item) = 0;
  68
  69   // Calls that SERVER can make
  70   virtual bool Advise(const wxString& item, wxChar *data, int size = -1, wxIPCFormat format = wxIPC_TEXT) = 0;
  71
  72   // Calls that both can make
  73   virtual bool Disconnect(void) = 0;
  74
  75   // Callbacks to SERVER - override at will
  76   virtual bool OnExecute     ( const wxString& WXUNUSED(topic),
  77                                wxChar *WXUNUSED(data),
  78                                int WXUNUSED(size),
  79                                wxIPCFormat WXUNUSED(format) )
  80                              { return false; };
  81
  82   virtual wxChar *OnRequest    ( const wxString& WXUNUSED(topic),
  83                                const wxString& WXUNUSED(item),
  84                                int *WXUNUSED(size),
  85                                wxIPCFormat WXUNUSED(format) )
  86                              { return (wxChar *) NULL; };
  87
  88   virtual bool OnPoke        ( const wxString& WXUNUSED(topic),
  89                                const wxString& WXUNUSED(item),
  90                                wxChar *WXUNUSED(data),
  91                                int WXUNUSED(size),
  92                                wxIPCFormat WXUNUSED(format) )
  93                              { return false; };
  94
  95   virtual bool OnStartAdvise ( const wxString& WXUNUSED(topic),
  96                                const wxString& WXUNUSED(item) )
  97                              { return false; };
  98
  99   virtual bool OnStopAdvise  ( const wxString& WXUNUSED(topic),
 100                                const wxString& WXUNUSED(item) )
 101                              { return false; };
 102
 103   // Callbacks to CLIENT - override at will
 104   virtual bool OnAdvise      ( const wxString& WXUNUSED(topic),
 105                                const wxString& WXUNUSED(item),
 106                                wxChar *WXUNUSED(data),
 107                                int WXUNUSED(size),
 108                                wxIPCFormat WXUNUSED(format) )
 109                              { return false; };
 110
 111   // Callbacks to BOTH - override at will
 112   // Default behaviour is to delete connection and return true
 113   virtual bool OnDisconnect(void) = 0;
 114
 115   // return a buffer at least this size, reallocating buffer if needed
 116   // returns NULL if using an inadequate user buffer - it can't be resized
 117   wxChar *      GetBufferAtLeast( size_t bytes );
 118
 119 protected:
 120   bool          m_connected;
 121 private:
 122   wxChar *      m_buffer;
 123   size_t        m_buffersize;
 124   bool          m_deletebufferwhendone;
 125
 126   // can't use DECLARE_NO_COPY_CLASS(wxConnectionBase) because we already
 127   // have copy ctor but still forbid the default assignment operator
 128   wxConnectionBase& operator=(const wxConnectionBase&);
 129 };
 130
 131
 132 class WXDLLIMPEXP_BASE wxServerBase: public wxObject
 133 {
 134   DECLARE_CLASS(wxServerBase)
 135
 136 public:
 137   inline wxServerBase(void) {}
 138   inline ~wxServerBase(void) {}
 139
 140   // Returns false on error (e.g. port number is already in use)
 141   virtual bool Create(const wxString& serverName) = 0;
 142
 143   // Callbacks to SERVER - override at will
 144   virtual wxConnectionBase *OnAcceptConnection(const wxString& topic) = 0;
 145 };
 146
 147 class WXDLLIMPEXP_BASE wxClientBase: public wxObject
 148 {
 149   DECLARE_CLASS(wxClientBase)
 150
 151 public:
 152   inline wxClientBase(void) {}
 153   inline ~wxClientBase(void) {}
 154
 155   virtual bool ValidHost(const wxString& host) = 0;
 156
 157   // Call this to make a connection. Returns NULL if cannot.
 158   virtual wxConnectionBase *MakeConnection(const wxString& host,
 159                                            const wxString& server,
 160                                            const wxString& topic) = 0;
 161
 162   // Callbacks to CLIENT - override at will
 163   virtual wxConnectionBase *OnMakeConnection(void) = 0;
 164 };
 165
 166 #endif
 167     // _WX_IPCBASEH__