dlls/user32/dde_private.h

   1 /*
   2  * DDEML library
   3  *
   4  * Copyright 1997 Alexandre Julliard
   5  * Copyright 1997 Len White
   6  * Copyright 1999 Keith Matthews
   7  * Copyright 2000 Corel
   8  * Copyright 2001 Eric Pouech
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2.1 of the License, or (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  23  */
  24
  25 #ifndef __WINE_DDEML_PRIVATE_H
  26 #define __WINE_DDEML_PRIVATE_H
  27
  28 /* defined in atom.c file.
  29  */
  30 #define MAX_ATOM_LEN              255
  31
  32 /* Maximum buffer size ( including the '\0' ).
  33  */
  34 #define MAX_BUFFER_LEN            (MAX_ATOM_LEN + 1)
  35
  36 /* The internal structures (prefixed by WDML) are used as follows:
  37  * + a WDML_INSTANCE is created for each instance creation (DdeInitialize)
  38  *      - a popup window (InstanceClass) is created for each instance.
  39  *      - this window is used to receive all the DDEML events (server registration,
  40  *        conversation confirmation...). See the WM_WDML_???? messages for details
  41  * + when registering a server (DdeNameService) a WDML_SERVER is created
  42  *      - a popup window (ServerNameClass) is created
  43  * + a conversation is represented by two WDML_CONV structures:
  44  *      - one on the client side, the other one on the server side
  45  *      - this is needed because the address spaces may be different
  46  *      - therefore, two lists of links are kept for each instance
  47  *      - two windows are created for a conversation:
  48  *              o a popup window on client side (ClientConvClass)
  49  *              o a child window (of the ServerName) on the server side
  50  *                (ServerConvClass)
  51  *      - all the exchanges then take place between those two windows
  52  *      - windows for the conversation exist in two forms (Ansi & Unicode). This
  53  *        is only needed when a partner in a conv is not handled by DDEML. The
  54  *        type (A/W) of the window is used to handle the ansi <=> unicode
  55  *        transformations
  56  *      - two handles are created for a conversation (on each side). Each handle
  57  *        is linked to a structure. To help differentiate those handles, the
  58  *        local one has an even value, whereas the remote one has an odd value.
  59  * + a (warm or link) is represented by two WDML_LINK structures:
  60  *      - one on client side, the other one on server side
  61  *      - therefore, two lists of links are kept for each instance
  62  *
  63  * To help getting back to data, WDML windows store information:
  64  *      - offset 0: the DDE instance
  65  *      - offset 4: the current conversation (for ClientConv and ServerConv only)
  66  *
  67  * All the implementation (client & server) makes the assumption that the other side
  68  * is not always a DDEML partner. However, if it's the case, supplementary services
  69  * are available (most notably the REGISTER/UNREGISTER and CONNECT_CONFIRM messages
  70  * to the callback function). To be correct in every situation, all the basic
  71  * exchanges are made using the 'pure' DDE protocol. A (future !) enhancement would
  72  * be to provide a new protocol in the case were both partners are handled by DDEML.
  73  *
  74  * The StringHandles are in fact stored as local atoms. So an HSZ and a (local) atom
  75  * can be used interchangeably. However, in order to keep track of the allocated HSZ,
  76  * and to free them upon instance termination, all HSZ are stored in a link list.
  77  * When the HSZ need to be passed through DDE messages, we need to convert them back and
  78  * forth to global atoms.
  79  */
  80
  81 /* this struct has the same mapping as all the DDE??? structures */
  82 typedef struct {
  83     unsigned short unused:12,
  84                    fResponse:1,
  85                    fRelease:1,
  86                    fDeferUpd:1,
  87                    fAckReq:1;
  88     short    cfFormat;
  89 } WINE_DDEHEAD;
  90
  91 typedef struct tagHSZNode
  92 {
  93     struct tagHSZNode*          next;
  94     HSZ                         hsz;
  95     unsigned                    refCount;
  96 } HSZNode;
  97
  98 typedef struct tagWDML_SERVER
  99 {
 100     struct tagWDML_SERVER*      next;
 101     HSZ                         hszService;
 102     HSZ                         hszServiceSpec;
 103     ATOM                        atomService;
 104     ATOM                        atomServiceSpec;
 105     BOOL                        filterOn;
 106     HWND                        hwndServer;
 107 } WDML_SERVER;
 108
 109 typedef struct tagWDML_XACT {
 110     struct tagWDML_XACT*        next;           /* list of transactions in conversation */
 111     DWORD                       xActID;
 112     UINT                        ddeMsg;
 113     HDDEDATA                    hDdeData;
 114     DWORD                       dwTimeout;
 115     DWORD                       hUser;
 116     UINT                        wType;
 117     UINT                        wFmt;
 118     HSZ                         hszItem;
 119     ATOM                        atom;           /* as converted from or to hszItem */
 120     HGLOBAL                     hMem;
 121     LPARAM                      lParam;         /* useful for reusing */
 122 } WDML_XACT;
 123
 124 typedef struct tagWDML_CONV
 125 {
 126     struct tagWDML_CONV*        next;           /* to link all the conversations */
 127     struct tagWDML_INSTANCE*    instance;
 128     HSZ                         hszService;     /* pmt used for connection */
 129     HSZ                         hszTopic;       /* pmt used for connection */
 130     UINT                        magic;          /* magic number to check validity */
 131     UINT                        afCmd;          /* service name flag */
 132     CONVCONTEXT                 convContext;
 133     HWND                        hwndClient;     /* source of conversation (ClientConvClass) */
 134     HWND                        hwndServer;     /* destination of conversation (ServerConvClass) */
 135     WDML_XACT*                  transactions;   /* pending transactions */
 136     DWORD                       hUser;          /* user defined value */
 137     DWORD                       wStatus;        /* same bits as convinfo.wStatus */
 138     DWORD                       wConvst;        /* same values as convinfo.wConvst */
 139 } WDML_CONV;
 140
 141 #define WDML_CONV_MAGIC  0xbabe1234
 142
 143 /* DDE_LINK struct defines hot, warm, and cold links */
 144 typedef struct tagWDML_LINK {
 145     struct tagWDML_LINK*        next;           /* to link all the active links */
 146     HCONV                       hConv;          /* to get back to the conversation */
 147     UINT                        transactionType;/* 0 for no link */
 148     HSZ                         hszItem;        /* item targeted for (hot/warm) link */
 149     UINT                        uFmt;           /* format for data */
 150 } WDML_LINK;
 151
 152 typedef struct tagWDML_INSTANCE
 153 {
 154     struct tagWDML_INSTANCE*    next;
 155     DWORD                       instanceID;     /* needed to track monitor usage */
 156     DWORD                       threadID;       /* needed to keep instance linked to a unique thread */
 157     BOOL                        monitor;        /* have these two as full Booleans cos they'll be tested frequently */
 158     BOOL                        clientOnly;     /* bit wasteful of space but it will be faster */
 159     BOOL                        unicode;        /* Flag to indicate Win32 API used to initialise */
 160     HSZNode*                    nodeList;       /* for cleaning upon exit */
 161     PFNCALLBACK                 callback;
 162     DWORD                       CBFflags;
 163     DWORD                       monitorFlags;
 164     DWORD                       lastError;
 165     HWND                        hwndEvent;
 166     DWORD                       wStatus;        /* global instance status */
 167     WDML_SERVER*                servers;        /* list of registered servers */
 168     WDML_CONV*                  convs[2];       /* active conversations for this instance (client and server) */
 169     WDML_LINK*                  links[2];       /* active links for this instance (client and server) */
 170 } WDML_INSTANCE;
 171
 172 /* header for the DDE Data objects */
 173 typedef struct tagDDE_DATAHANDLE_HEAD
 174 {
 175     WORD        cfFormat;
 176     WORD        bAppOwned;
 177 } DDE_DATAHANDLE_HEAD;
 178
 179 typedef enum tagWDML_SIDE
 180 {
 181     WDML_CLIENT_SIDE = 0, WDML_SERVER_SIDE = 1
 182 } WDML_SIDE;
 183
 184 typedef enum {
 185     WDML_QS_ERROR, WDML_QS_HANDLED, WDML_QS_PASS, WDML_QS_SWALLOWED, WDML_QS_BLOCK,
 186 } WDML_QUEUE_STATE;
 187
 188 extern  HDDEDATA        WDML_InvokeCallback(WDML_INSTANCE* pInst, UINT uType, UINT uFmt, HCONV hConv,
 189                                             HSZ hsz1, HSZ hsz2, HDDEDATA hdata,
 190                                             ULONG_PTR dwData1, ULONG_PTR dwData2) DECLSPEC_HIDDEN;
 191 extern  WDML_SERVER*    WDML_AddServer(WDML_INSTANCE* pInstance, HSZ hszService, HSZ hszTopic) DECLSPEC_HIDDEN;
 192 extern  void            WDML_RemoveServer(WDML_INSTANCE* pInstance, HSZ hszService, HSZ hszTopic) DECLSPEC_HIDDEN;
 193 extern  WDML_SERVER*    WDML_FindServer(WDML_INSTANCE* pInstance, HSZ hszService, HSZ hszTopic) DECLSPEC_HIDDEN;
 194 /* transaction handler on the server side */
 195 extern WDML_QUEUE_STATE WDML_ServerHandle(WDML_CONV* pConv, WDML_XACT* pXAct) DECLSPEC_HIDDEN;
 196 /* transaction handler on the client side */
 197 HDDEDATA WDML_ClientHandle(WDML_CONV *pConv, WDML_XACT *pXAct, DWORD dwTimeout, LPDWORD pdwResult) DECLSPEC_HIDDEN;
 198 /* called both in DdeClientTransaction and server side. */
 199 extern  WDML_CONV*      WDML_AddConv(WDML_INSTANCE* pInstance, WDML_SIDE side,
 200                                      HSZ hszService, HSZ hszTopic, HWND hwndClient, HWND hwndServer) DECLSPEC_HIDDEN;
 201 extern  void            WDML_RemoveConv(WDML_CONV* pConv, WDML_SIDE side) DECLSPEC_HIDDEN;
 202 extern  WDML_CONV*      WDML_GetConv(HCONV hConv, BOOL checkConnected) DECLSPEC_HIDDEN;
 203 extern  WDML_CONV*      WDML_GetConvFromWnd(HWND hWnd) DECLSPEC_HIDDEN;
 204 extern  WDML_CONV*      WDML_FindConv(WDML_INSTANCE* pInstance, WDML_SIDE side,
 205                                       HSZ hszService, HSZ hszTopic) DECLSPEC_HIDDEN;
 206 extern  BOOL            WDML_PostAck(WDML_CONV* pConv, WDML_SIDE side, WORD appRetCode,
 207                                      BOOL fBusy, BOOL fAck, UINT_PTR pmt, LPARAM lParam, UINT oldMsg) DECLSPEC_HIDDEN;
 208 extern  void            WDML_AddLink(WDML_INSTANCE* pInstance, HCONV hConv, WDML_SIDE side,
 209                                      UINT wType, HSZ hszItem, UINT wFmt) DECLSPEC_HIDDEN;
 210 extern  WDML_LINK*      WDML_FindLink(WDML_INSTANCE* pInstance, HCONV hConv, WDML_SIDE side,
 211                                       HSZ hszItem, BOOL use_fmt, UINT uFmt) DECLSPEC_HIDDEN;
 212 extern  void            WDML_RemoveLink(WDML_INSTANCE* pInstance, HCONV hConv, WDML_SIDE side,
 213                                         HSZ hszItem, UINT wFmt) DECLSPEC_HIDDEN;
 214 /* string internals */
 215 extern  BOOL            WDML_DecHSZ(WDML_INSTANCE* pInstance, HSZ hsz) DECLSPEC_HIDDEN;
 216 extern  BOOL            WDML_IncHSZ(WDML_INSTANCE* pInstance, HSZ hsz) DECLSPEC_HIDDEN;
 217 extern  ATOM            WDML_MakeAtomFromHsz(HSZ hsz) DECLSPEC_HIDDEN;
 218 extern  HSZ             WDML_MakeHszFromAtom(const WDML_INSTANCE* pInstance, ATOM atom) DECLSPEC_HIDDEN;
 219 /* client calls these */
 220 extern  WDML_XACT*      WDML_AllocTransaction(WDML_INSTANCE* pInstance, UINT ddeMsg, UINT wFmt, HSZ hszItem) DECLSPEC_HIDDEN;
 221 extern  void            WDML_QueueTransaction(WDML_CONV* pConv, WDML_XACT* pXAct) DECLSPEC_HIDDEN;
 222 extern  BOOL            WDML_UnQueueTransaction(WDML_CONV* pConv, WDML_XACT*  pXAct) DECLSPEC_HIDDEN;
 223 extern  void            WDML_FreeTransaction(WDML_INSTANCE* pInstance, WDML_XACT* pXAct, BOOL doFreePmt) DECLSPEC_HIDDEN;
 224 extern  HGLOBAL         WDML_DataHandle2Global(HDDEDATA hDdeData, BOOL fResponse, BOOL fRelease,
 225                                                BOOL fDeferUpd, BOOL dAckReq) DECLSPEC_HIDDEN;
 226 extern  HDDEDATA        WDML_Global2DataHandle(WDML_CONV* pConv, HGLOBAL hMem, WINE_DDEHEAD* da) DECLSPEC_HIDDEN;
 227 extern  BOOL            WDML_IsAppOwned(HDDEDATA hDdeData) DECLSPEC_HIDDEN;
 228 extern  WDML_INSTANCE*  WDML_GetInstance(DWORD InstId) DECLSPEC_HIDDEN;
 229 extern  WDML_INSTANCE*  WDML_GetInstanceFromWnd(HWND hWnd) DECLSPEC_HIDDEN;
 230 /* broadcasting to DDE windows */
 231 extern  void            WDML_BroadcastDDEWindows(LPCWSTR clsName, UINT uMsg,
 232                                                  WPARAM wParam, LPARAM lParam) DECLSPEC_HIDDEN;
 233 extern  void            WDML_NotifyThreadExit(DWORD tid) DECLSPEC_HIDDEN;
 234 extern  void            WDML_NotifyThreadDetach(void) DECLSPEC_HIDDEN;
 235
 236
 237 static inline void WDML_ExtractAck(WORD status, DDEACK* da)
 238 {
 239     *da = *((DDEACK*)&status);
 240 }
 241
 242 extern const WCHAR WDML_szEventClass[] DECLSPEC_HIDDEN; /* class of window for events (aka instance) */
 243 extern const char WDML_szServerConvClassA[] DECLSPEC_HIDDEN; /* ANSI class of window for server side conv */
 244 extern const WCHAR WDML_szServerConvClassW[] DECLSPEC_HIDDEN; /* unicode class of window for server side conv */
 245 extern const char WDML_szClientConvClassA[] DECLSPEC_HIDDEN; /* ANSI class of window for client side conv */
 246 extern const WCHAR WDML_szClientConvClassW[] DECLSPEC_HIDDEN; /* unicode class of window for client side conv */
 247
 248 #define WM_WDML_REGISTER        (WM_USER + 0x200)
 249 #define WM_WDML_UNREGISTER      (WM_USER + 0x201)
 250 #define WM_WDML_CONNECT_CONFIRM (WM_USER + 0x202)
 251
 252 /* parameters for messages:
 253  *                      wParam                          lParam
 254  * Register             atom for service name           atom for service spec
 255  * Unregister           atom for service name           atom for service spec
 256  * ConnectConfirm       client window handle            server window handle
 257  */
 258
 259 #define GWL_WDML_INSTANCE       (0)
 260 #define GWL_WDML_CONVERSATION   (sizeof(ULONG_PTR))
 261 #define GWL_WDML_SERVER         (sizeof(ULONG_PTR))
 262
 263 #endif  /* __WINE_DDEML_PRIVATE_H */