reactos/dll/win32/user32/include/dde_private.h

   1 /* -*- tab-width: 8; c-basic-offset: 4 -*- */
   2
   3 /*
   4  * DDEML library
   5  *
   6  * Copyright 1997 Alexandre Julliard
   7  * Copyright 1997 Len White
   8  * Copyright 1999 Keith Matthews
   9  * Copyright 2000 Corel
  10  * Copyright 2001 Eric Pouech
  11  *
  12  * This library is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU Lesser General Public
  14  * License as published by the Free Software Foundation; either
  15  * version 2.1 of the License, or (at your option) any later version.
  16  *
  17  * This library is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * Lesser General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Lesser General Public
  23  * License along with this library; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  25  */
  26
  27 #ifndef __WINE_DDEML_PRIVATE_H
  28 #define __WINE_DDEML_PRIVATE_H
  29
  30 /* defined in atom.c file.
  31  */
  32 #define MAX_ATOM_LEN              255
  33
  34 /* Maximum buffer size ( including the '\0' ).
  35  */
  36 #define MAX_BUFFER_LEN            (MAX_ATOM_LEN + 1)
  37
  38 /* The internal structures (prefixed by WDML) are used as follows:
  39  * + a WDML_INSTANCE is created for each instance creation (DdeInitialize)
  40  *      - a popup window (InstanceClass) is created for each instance.
  41  *      - this window is used to receive all the DDEML events (server registration,
  42  *        conversation confirmation...). See the WM_WDML_???? messages for details
  43  * + when registring a server (DdeNameService) a WDML_SERVER is created
  44  *      - a popup window (ServerNameClass) is created
  45  * + a conversation is represented by two WDML_CONV structures:
  46  *      - one on the client side, the other one on the server side
  47  *      - this is needed because the address spaces may be different
  48  *      - therefore, two lists of links are kept for each instance
  49  *      - two windows are created for a conversation:
  50  *              o a popup window on client side (ClientConvClass)
  51  *              o a child window (of the ServerName) on the server side
  52  *                (ServerConvClass)
  53  *      - all the exchanges then take place between those two windows
  54  *      - windows for the conversation exist in two forms (Ansi & Unicode). This
  55  *        is only needed when a partner in a conv is not handled by DDEML. The
  56  *        type (A/W) of the window is used to handle the ansi <=> unicode
  57  *        transformations
  58  *      - two handles are created for a conversation (on each side). Each handle
  59  *        is linked to a structure. To help differentiate those handles, the
  60  *        local one has an even value, whereas the remote one has an odd value.
  61  * + a (warm or link) is represented by two WDML_LINK structures:
  62  *      - one on client side, the other one on server side
  63  *      - therefore, two lists of links are kept for each instance
  64  *
  65  * To help getting back to data, WDML windows store information:
  66  *      - offset 0: the DDE instance
  67  *      - offset 4: the current conversation (for ClientConv and ServerConv only)
  68  *
  69  * All the implementation (client & server) makes the assumption that the other side
  70  * is not always a DDEML partner. However, if it's the case, supplementary services
  71  * are available (most notably the REGISTER/UNREGISTER and CONNECT_CONFIRM messages
  72  * to the callback function). To be correct in every situation, all the basic
  73  * exchanges are made using the 'pure' DDE protocol. A (future !) enhancement would
  74  * be to provide a new protocol in the case were both partners are handled by DDEML.
  75  *
  76  * The StringHandles are in fact stored as local atoms. So an HSZ and a (local) atom
  77  * can be used interchangably. However, in order to keep track of the allocated HSZ,
  78  * and to free them upon instance termination, all HSZ are stored in a link list.
  79  * When the HSZ need to be passed thru DDE messages, we need to convert them back and
  80  * forth to global atoms.
  81  */
  82
  83 /* this struct has the same mapping as all the DDE??? structures */
  84 typedef struct {
  85     unsigned short unused:12,
  86                    fResponse:1,
  87                    fRelease:1,
  88                    fDeferUpd:1,
  89                    fAckReq:1;
  90     short    cfFormat;
  91 } WINE_DDEHEAD;
  92
  93 typedef struct tagHSZNode
  94 {
  95     struct tagHSZNode*          next;
  96     HSZ                         hsz;
  97     unsigned                    refCount;
  98 } HSZNode;
  99
 100 typedef struct tagWDML_SERVER
 101 {
 102     struct tagWDML_SERVER*      next;
 103     HSZ                         hszService;
 104     HSZ                         hszServiceSpec;
 105     ATOM                        atomService;
 106     ATOM                        atomServiceSpec;
 107     BOOL                        filterOn;
 108     HWND                        hwndServer;
 109 } WDML_SERVER;
 110
 111 typedef struct tagWDML_XACT {
 112     struct tagWDML_XACT*        next;           /* list of transactions in conversation */
 113     DWORD                       xActID;
 114     UINT                        ddeMsg;
 115     HDDEDATA                    hDdeData;
 116     DWORD                       dwTimeout;
 117     DWORD                       hUser;
 118     UINT                        wType;
 119     UINT                        wFmt;
 120     HSZ                         hszItem;
 121     ATOM                        atom;           /* as converted from or to hszItem */
 122     HGLOBAL                     hMem;
 123     LPARAM                      lParam;         /* useful for reusing */
 124 } WDML_XACT;
 125
 126 typedef struct tagWDML_CONV
 127 {
 128     struct tagWDML_CONV*        next;           /* to link all the conversations */
 129     struct tagWDML_INSTANCE*    instance;
 130     HSZ                         hszService;     /* pmt used for connection */
 131     HSZ                         hszTopic;       /* pmt used for connection */
 132     UINT                        afCmd;          /* service name flag */
 133     CONVCONTEXT                 convContext;
 134     HWND                        hwndClient;     /* source of conversation (ClientConvClass) */
 135     HWND                        hwndServer;     /* destination of conversation (ServerConvClass) */
 136     WDML_XACT*                  transactions;   /* pending transactions */
 137     DWORD                       hUser;          /* user defined value */
 138     DWORD                       wStatus;        /* same bits as convinfo.wStatus */
 139     DWORD                       wConvst;        /* same values as convinfo.wConvst */
 140 } WDML_CONV;
 141
 142 /* DDE_LINK struct defines hot, warm, and cold links */
 143 typedef struct tagWDML_LINK {
 144     struct tagWDML_LINK*        next;           /* to link all the active links */
 145     HCONV                       hConv;          /* to get back to the converstaion */
 146     UINT                        transactionType;/* 0 for no link */
 147     HSZ                         hszItem;        /* item targetted for (hot/warm) link */
 148     UINT                        uFmt;           /* format for data */
 149 } WDML_LINK;
 150
 151 typedef struct tagWDML_INSTANCE
 152 {
 153     struct tagWDML_INSTANCE*    next;
 154     DWORD                       instanceID;     /* needed to track monitor usage */
 155     DWORD                       threadID;       /* needed to keep instance linked to a unique thread */
 156     BOOL                        monitor;        /* have these two as full Booleans cos they'll be tested frequently */
 157     BOOL                        clientOnly;     /* bit wasteful of space but it will be faster */
 158     BOOL                        unicode;        /* Flag to indicate Win32 API used to initialise */
 159     BOOL                        win16;          /* flag to indicate Win16 API used to initialize */
 160     HSZNode*                    nodeList;       /* for cleaning upon exit */
 161     PFNCALLBACK                 callback;
 162     DWORD                       CBFflags;
 163     DWORD                       monitorFlags;
 164     DWORD                       lastError;
 165     HWND                        hwndEvent;
 166     WDML_SERVER*                servers;        /* list of registered servers */
 167     WDML_CONV*                  convs[2];       /* active conversations for this instance (client and server) */
 168     WDML_LINK*                  links[2];       /* active links for this instance (client and server) */
 169 } WDML_INSTANCE;
 170
 171 extern CRITICAL_SECTION WDML_CritSect;          /* protection for instance list */
 172
 173 /* header for the DDE Data objects */
 174 typedef struct tagDDE_DATAHANDLE_HEAD
 175 {
 176     short       cfFormat;
 177     WORD        bAppOwned;
 178 } DDE_DATAHANDLE_HEAD;
 179
 180 typedef enum tagWDML_SIDE
 181 {
 182     WDML_CLIENT_SIDE = 0, WDML_SERVER_SIDE = 1
 183 } WDML_SIDE;
 184
 185 typedef enum {
 186     WDML_QS_ERROR, WDML_QS_HANDLED, WDML_QS_PASS, WDML_QS_SWALLOWED, WDML_QS_BLOCK,
 187 } WDML_QUEUE_STATE;
 188
 189 extern  HDDEDATA        WDML_InvokeCallback(WDML_INSTANCE* pInst, UINT uType, UINT uFmt, HCONV hConv,
 190                                             HSZ hsz1, HSZ hsz2, HDDEDATA hdata,
 191                                             DWORD dwData1, DWORD dwData2);
 192 extern  HDDEDATA        WDML_InvokeCallback16(PFNCALLBACK pfn, UINT uType, UINT uFmt, HCONV hConv,
 193                                               HSZ hsz1, HSZ hsz2, HDDEDATA hdata,
 194                                               DWORD dwData1, DWORD dwData2);
 195 extern  WDML_SERVER*    WDML_AddServer(WDML_INSTANCE* pInstance, HSZ hszService, HSZ hszTopic);
 196 extern  void            WDML_RemoveServer(WDML_INSTANCE* pInstance, HSZ hszService, HSZ hszTopic);
 197 extern  WDML_SERVER*    WDML_FindServer(WDML_INSTANCE* pInstance, HSZ hszService, HSZ hszTopic);
 198 /* transaction handler on the server side */
 199 extern WDML_QUEUE_STATE WDML_ServerHandle(WDML_CONV* pConv, WDML_XACT* pXAct);
 200 /* called both in DdeClientTransaction and server side. */
 201 extern  UINT            WDML_Initialize(LPDWORD pidInst, PFNCALLBACK pfnCallback,
 202                                         DWORD afCmd, DWORD ulRes, BOOL bUnicode, BOOL b16);
 203 extern  WDML_CONV*      WDML_AddConv(WDML_INSTANCE* pInstance, WDML_SIDE side,
 204                                      HSZ hszService, HSZ hszTopic, HWND hwndClient, HWND hwndServer);
 205 extern  void            WDML_RemoveConv(WDML_CONV* pConv, WDML_SIDE side);
 206 extern  WDML_CONV*      WDML_GetConv(HCONV hConv, BOOL checkConnected);
 207 extern  WDML_CONV*      WDML_GetConvFromWnd(HWND hWnd);
 208 extern  WDML_CONV*      WDML_FindConv(WDML_INSTANCE* pInstance, WDML_SIDE side,
 209                                       HSZ hszService, HSZ hszTopic);
 210 extern  BOOL            WDML_PostAck(WDML_CONV* pConv, WDML_SIDE side, WORD appRetCode,
 211                                      BOOL fBusy, BOOL fAck, UINT pmt, LPARAM lParam, UINT oldMsg);
 212 extern  void            WDML_AddLink(WDML_INSTANCE* pInstance, HCONV hConv, WDML_SIDE side,
 213                                      UINT wType, HSZ hszItem, UINT wFmt);
 214 extern  WDML_LINK*      WDML_FindLink(WDML_INSTANCE* pInstance, HCONV hConv, WDML_SIDE side,
 215                                       HSZ hszItem, BOOL use_fmt, UINT uFmt);
 216 extern  void            WDML_RemoveLink(WDML_INSTANCE* pInstance, HCONV hConv, WDML_SIDE side,
 217                                         HSZ hszItem, UINT wFmt);
 218 extern  void            WDML_RemoveAllLinks(WDML_INSTANCE* pInstance, WDML_CONV* pConv, WDML_SIDE side);
 219 /* string internals */
 220 extern  void            WDML_FreeAllHSZ(WDML_INSTANCE* pInstance);
 221 extern  BOOL            WDML_DecHSZ(WDML_INSTANCE* pInstance, HSZ hsz);
 222 extern  BOOL            WDML_IncHSZ(WDML_INSTANCE* pInstance, HSZ hsz);
 223 extern  ATOM            WDML_MakeAtomFromHsz(HSZ hsz);
 224 extern  HSZ             WDML_MakeHszFromAtom(WDML_INSTANCE* pInstance, ATOM atom);
 225 /* client calls these */
 226 extern  WDML_XACT*      WDML_AllocTransaction(WDML_INSTANCE* pInstance, UINT ddeMsg, UINT wFmt, HSZ hszItem);
 227 extern  void            WDML_QueueTransaction(WDML_CONV* pConv, WDML_XACT* pXAct);
 228 extern  BOOL            WDML_UnQueueTransaction(WDML_CONV* pConv, WDML_XACT*  pXAct);
 229 extern  void            WDML_FreeTransaction(WDML_INSTANCE* pInstance, WDML_XACT* pXAct, BOOL doFreePmt);
 230 extern  WDML_XACT*      WDML_FindTransaction(WDML_CONV* pConv, DWORD tid);
 231 extern  HGLOBAL         WDML_DataHandle2Global(HDDEDATA hDdeData, BOOL fResponse, BOOL fRelease,
 232                                                BOOL fDeferUpd, BOOL dAckReq);
 233 extern  HDDEDATA        WDML_Global2DataHandle(HGLOBAL hMem, WINE_DDEHEAD* da);
 234 extern  BOOL            WDML_IsAppOwned(HDDEDATA hDdeData);
 235 extern  WDML_INSTANCE*  WDML_GetInstance(DWORD InstId);
 236 extern  WDML_INSTANCE*  WDML_GetInstanceFromWnd(HWND hWnd);
 237 /* broadcasting to DDE windows */
 238 extern  void            WDML_BroadcastDDEWindows(const char* clsName, UINT uMsg,
 239                                                  WPARAM wParam, LPARAM lParam);
 240 extern  void            WDML_NotifyThreadExit(DWORD tid);
 241
 242 static __inline void WDML_ExtractAck(WORD status, DDEACK* da)
 243 {
 244     *da = *((DDEACK*)&status);
 245 }
 246
 247 extern const char       WDML_szEventClass[];       /* class of window for events (aka instance) */
 248 extern const char       WDML_szServerConvClassA[]; /* class of window for server side conv (ansi) */
 249 extern const WCHAR      WDML_szServerConvClassW[]; /* class of window for server side conv (unicode) */
 250 extern const char       WDML_szClientConvClassA[]; /* class of window for client side conv (ansi) */
 251 extern const WCHAR      WDML_szClientConvClassW[]; /* class of window for client side conv (unicode) */
 252
 253 #define WM_WDML_REGISTER        (WM_USER + 0x200)
 254 #define WM_WDML_UNREGISTER      (WM_USER + 0x201)
 255 #define WM_WDML_CONNECT_CONFIRM (WM_USER + 0x202)
 256
 257 /* parameters for messages:
 258  *                      wParam                          lParam
 259  * Register             atom for service name           atom for service spec
 260  * Unregister           atom for service name           atom for service spec
 261  * ConnectConfirm       client window handle            server window handle
 262  */
 263
 264 #define GWL_WDML_INSTANCE       (0)
 265 #define GWL_WDML_CONVERSATION   (4)
 266 #define GWL_WDML_SERVER         (4)
 267
 268 #endif  /* __WINE_DDEML_PRIVATE_H */