1 /* -*- tab-width: 8; c-basic-offset: 4 -*- */
6 * Copyright 1997 Alexandre Julliard
7 * Copyright 1997 Len White
8 * Copyright 1999 Keith Matthews
10 * Copyright 2001 Eric Pouech
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.
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.
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
37 #include "wine/debug.h"
38 #include "dde/dde_private.h"
40 WINE_DEFAULT_DEBUG_CHANNEL(ddeml);
42 static LRESULT CALLBACK WDML_ClientProc(HWND, UINT, WPARAM, LPARAM); /* only for one client, not conv list */
43 const char WDML_szClientConvClassA[] = "DdeClientAnsi";
44 const WCHAR WDML_szClientConvClassW[] = {'D','d','e','C','l','i','e','n','t','U','n','i','c','o','d','e',0};
46 /******************************************************************************
47 * DdeConnectList [USER32.@] Establishes conversation with DDE servers
50 * idInst [I] Instance identifier
51 * hszService [I] Handle to service name string
52 * hszTopic [I] Handle to topic name string
53 * hConvList [I] Handle to conversation list
54 * pCC [I] Pointer to structure with context data
57 * Success: Handle to new conversation list
60 HCONVLIST WINAPI DdeConnectList(DWORD idInst, HSZ hszService, HSZ hszTopic,
61 HCONVLIST hConvList, PCONVCONTEXT pCC)
63 FIXME("(%ld,%p,%p,%p,%p): stub\n", idInst, hszService, hszTopic, hConvList, pCC);
67 /*****************************************************************
68 * DdeQueryNextServer [USER32.@]
70 HCONV WINAPI DdeQueryNextServer(HCONVLIST hConvList, HCONV hConvPrev)
72 FIXME("(%p,%p): stub\n", hConvList, hConvPrev);
76 /******************************************************************************
77 * DdeDisconnectList [USER32.@] Destroys list and terminates conversations
81 * hConvList [I] Handle to conversation list
87 BOOL WINAPI DdeDisconnectList(HCONVLIST hConvList)
89 FIXME("(%p): stub\n", hConvList);
93 /*****************************************************************
94 * DdeConnect (USER32.@)
96 HCONV WINAPI DdeConnect(DWORD idInst, HSZ hszService, HSZ hszTopic,
100 WDML_INSTANCE* pInstance;
101 WDML_CONV* pConv = NULL;
102 ATOM aSrv = 0, aTpc = 0;
104 TRACE("(0x%lx,%p,%p,%p)\n", idInst, hszService, hszTopic, pCC);
106 EnterCriticalSection(&WDML_CritSect);
108 pInstance = WDML_GetInstance(idInst);
114 /* make sure this conv is never created */
115 pConv = WDML_FindConv(pInstance, WDML_CLIENT_SIDE, hszService, hszTopic);
118 ERR("This Conv already exists: (0x%lx)\n", (DWORD)pConv);
122 /* we need to establish a conversation with
123 server, so create a window for it */
125 if (pInstance->unicode)
127 WNDCLASSEXW wndclass;
129 wndclass.cbSize = sizeof(wndclass);
131 wndclass.lpfnWndProc = WDML_ClientProc;
132 wndclass.cbClsExtra = 0;
133 wndclass.cbWndExtra = 2 * sizeof(DWORD);
134 wndclass.hInstance = 0;
136 wndclass.hCursor = 0;
137 wndclass.hbrBackground = 0;
138 wndclass.lpszMenuName = NULL;
139 wndclass.lpszClassName = WDML_szClientConvClassW;
140 wndclass.hIconSm = 0;
142 RegisterClassExW(&wndclass);
144 hwndClient = CreateWindowW(WDML_szClientConvClassW, NULL, WS_POPUP, 0, 0, 0, 0, 0, 0, 0, 0);
148 WNDCLASSEXA wndclass;
150 wndclass.cbSize = sizeof(wndclass);
152 wndclass.lpfnWndProc = WDML_ClientProc;
153 wndclass.cbClsExtra = 0;
154 wndclass.cbWndExtra = 2 * sizeof(DWORD);
155 wndclass.hInstance = 0;
157 wndclass.hCursor = 0;
158 wndclass.hbrBackground = 0;
159 wndclass.lpszMenuName = NULL;
160 wndclass.lpszClassName = WDML_szClientConvClassA;
161 wndclass.hIconSm = 0;
163 RegisterClassExA(&wndclass);
165 hwndClient = CreateWindowA(WDML_szClientConvClassA, NULL, WS_POPUP, 0, 0, 0, 0, 0, 0, 0, 0);
168 SetWindowLongA(hwndClient, GWL_WDML_INSTANCE, (DWORD)pInstance);
172 aSrv = WDML_MakeAtomFromHsz(hszService);
173 if (!aSrv) goto theEnd;
177 aTpc = WDML_MakeAtomFromHsz(hszTopic);
178 if (!aTpc) goto theEnd;
181 LeaveCriticalSection(&WDML_CritSect);
183 /* note: sent messages shall not use packing */
184 SendMessageA(HWND_BROADCAST, WM_DDE_INITIATE, (WPARAM)hwndClient, MAKELPARAM(aSrv, aTpc));
186 EnterCriticalSection(&WDML_CritSect);
188 pInstance = WDML_GetInstance(idInst);
194 /* At this point, Client WM_DDE_ACK should have saved hwndServer
195 for this instance id and hwndClient if server responds.
196 So get HCONV and return it. And add it to conv list */
197 pConv = WDML_GetConvFromWnd(hwndClient);
198 if (pConv == NULL || pConv->hwndServer == 0)
200 ERR("Done with INITIATE, but no Server window available\n");
204 TRACE("Connected to Server window (%p)\n", pConv->hwndServer);
205 pConv->wConvst = XST_CONNECTED;
207 /* finish init of pConv */
210 pConv->convContext = *pCC;
214 memset(&pConv->convContext, 0, sizeof(pConv->convContext));
215 pConv->convContext.cb = sizeof(pConv->convContext);
216 pConv->convContext.iCodePage = (pInstance->unicode) ? CP_WINUNICODE : CP_WINANSI;
220 LeaveCriticalSection(&WDML_CritSect);
222 if (aSrv) GlobalDeleteAtom(aSrv);
223 if (aTpc) GlobalDeleteAtom(aTpc);
227 /*****************************************************************
228 * DdeReconnect (DDEML.37)
229 * DdeReconnect (USER32.@)
231 HCONV WINAPI DdeReconnect(HCONV hConv)
234 WDML_CONV* pNewConv = NULL;
235 ATOM aSrv = 0, aTpc = 0;
237 EnterCriticalSection(&WDML_CritSect);
238 pConv = WDML_GetConv(hConv, FALSE);
239 if (pConv != NULL && (pConv->wStatus & ST_CLIENT))
243 /* to reestablist a connection, we have to make sure that:
244 * 1/ pConv is the converstation attached to the client window (it wouldn't be
245 * if a call to DdeReconnect would have already been done...)
246 * FIXME: is this really an error ???
247 * 2/ the pConv conversation had really been deconnected
249 if (pConv == WDML_GetConvFromWnd(pConv->hwndClient) &&
250 (pConv->wStatus & ST_TERMINATED) && !(pConv->wStatus & ST_CONNECTED))
252 HWND hwndClient = pConv->hwndClient;
253 HWND hwndServer = pConv->hwndServer;
256 SetWindowLongA(pConv->hwndClient, GWL_WDML_CONVERSATION, 0);
258 aSrv = WDML_MakeAtomFromHsz(pConv->hszService);
259 aTpc = WDML_MakeAtomFromHsz(pConv->hszTopic);
260 if (!aSrv || !aTpc) goto theEnd;
262 LeaveCriticalSection(&WDML_CritSect);
264 /* note: sent messages shall not use packing */
265 ret = SendMessageA(hwndServer, WM_DDE_INITIATE, (WPARAM)hwndClient,
266 MAKELPARAM(aSrv, aTpc));
268 EnterCriticalSection(&WDML_CritSect);
270 pConv = WDML_GetConv(hConv, FALSE);
273 FIXME("Should fail reconnection\n");
277 if (ret && (pNewConv = WDML_GetConvFromWnd(pConv->hwndClient)) != NULL)
279 /* re-establish all links... */
282 for (pLink = pConv->instance->links[WDML_CLIENT_SIDE]; pLink; pLink = pLink->next)
284 if (pLink->hConv == hConv)
286 /* try to reestablish the links... */
287 DdeClientTransaction(NULL, 0, (HCONV)pNewConv, pLink->hszItem, pLink->uFmt,
288 pLink->transactionType, 1000, NULL);
294 /* reset the conversation as it was */
295 SetWindowLongA(pConv->hwndClient, GWL_WDML_CONVERSATION, (DWORD)pConv);
301 LeaveCriticalSection(&WDML_CritSect);
303 if (aSrv) GlobalDeleteAtom(aSrv);
304 if (aTpc) GlobalDeleteAtom(aTpc);
305 return (HCONV)pNewConv;
308 /******************************************************************
309 * WDML_ClientQueueAdvise
311 * Creates and queue an WM_DDE_ADVISE transaction
313 static WDML_XACT* WDML_ClientQueueAdvise(WDML_CONV* pConv, UINT wType, UINT wFmt, HSZ hszItem)
315 DDEADVISE* pDdeAdvise;
319 TRACE("XTYP_ADVSTART (with%s data) transaction\n", (wType & XTYPF_NODATA) ? "out" : "");
321 atom = WDML_MakeAtomFromHsz(hszItem);
322 if (!atom) return NULL;
324 pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_ADVISE, wFmt, hszItem);
327 GlobalDeleteAtom(atom);
331 pXAct->wType = wType & ~0x0F;
332 pXAct->hMem = GlobalAlloc(GHND | GMEM_DDESHARE, sizeof(DDEADVISE));
333 /* FIXME: hMem is unfreed for now... should be deleted in server */
336 pDdeAdvise = (DDEADVISE*)GlobalLock(pXAct->hMem);
337 pDdeAdvise->fAckReq = (wType & XTYPF_ACKREQ) ? TRUE : FALSE;
338 pDdeAdvise->fDeferUpd = (wType & XTYPF_NODATA) ? TRUE : FALSE;
339 pDdeAdvise->cfFormat = wFmt;
340 GlobalUnlock(pXAct->hMem);
342 pXAct->lParam = PackDDElParam(WM_DDE_ADVISE, (UINT)pXAct->hMem, atom);
347 /******************************************************************
348 * WDML_HandleAdviseReply
350 * handles the reply to an advise request
352 static WDML_QUEUE_STATE WDML_HandleAdviseReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct)
358 if (msg->message != WM_DDE_ACK || WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
363 UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
364 hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
366 if (DdeCmpStringHandles(hsz, pXAct->hszItem) != 0)
369 GlobalDeleteAtom(uiHi);
370 FreeDDElParam(WM_DDE_ACK, msg->lParam);
372 WDML_ExtractAck(uiLo, &ddeAck);
378 /* billx: first to see if the link is already created. */
379 pLink = WDML_FindLink(pConv->instance, (HCONV)pConv, WDML_CLIENT_SIDE,
380 pXAct->hszItem, TRUE, pXAct->wFmt);
383 /* we found a link, and only need to modify it in case it changes */
384 pLink->transactionType = pXAct->wType;
388 WDML_AddLink(pConv->instance, (HCONV)pConv, WDML_CLIENT_SIDE,
389 pXAct->wType, pXAct->hszItem, pXAct->wFmt);
391 pXAct->hDdeData = (HDDEDATA)1;
395 TRACE("Returning FALSE on XTYP_ADVSTART - fAck was FALSE\n");
396 GlobalFree(pXAct->hMem);
397 pXAct->hDdeData = NULL;
400 return WDML_QS_HANDLED;
403 /******************************************************************
404 * WDML_ClientQueueUnadvise
406 * queues an unadvise transaction
408 static WDML_XACT* WDML_ClientQueueUnadvise(WDML_CONV* pConv, UINT wFmt, HSZ hszItem)
413 TRACE("XTYP_ADVSTOP transaction\n");
415 atom = WDML_MakeAtomFromHsz(hszItem);
416 if (!atom) return NULL;
418 pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_UNADVISE, wFmt, hszItem);
421 GlobalDeleteAtom(atom);
425 /* end advise loop: post WM_DDE_UNADVISE to server to terminate link
426 * on the specified item.
428 pXAct->lParam = PackDDElParam(WM_DDE_UNADVISE, wFmt, atom);
432 /******************************************************************
433 * WDML_HandleUnadviseReply
437 static WDML_QUEUE_STATE WDML_HandleUnadviseReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct)
443 if (msg->message != WM_DDE_ACK || WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
448 UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
449 hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
451 if (DdeCmpStringHandles(hsz, pXAct->hszItem) != 0)
454 FreeDDElParam(WM_DDE_ACK, msg->lParam);
455 GlobalDeleteAtom(uiHi);
457 WDML_ExtractAck(uiLo, &ddeAck);
459 TRACE("WM_DDE_ACK received while waiting for a timeout\n");
463 TRACE("Returning FALSE on XTYP_ADVSTOP - fAck was FALSE\n");
464 pXAct->hDdeData = NULL;
468 /* billx: remove the link */
469 WDML_RemoveLink(pConv->instance, (HCONV)pConv, WDML_CLIENT_SIDE,
470 pXAct->hszItem, pXAct->wFmt);
471 pXAct->hDdeData = (HDDEDATA)1;
473 return WDML_QS_HANDLED;
476 /******************************************************************
477 * WDML_ClientQueueRequest
481 static WDML_XACT* WDML_ClientQueueRequest(WDML_CONV* pConv, UINT wFmt, HSZ hszItem)
486 TRACE("XTYP_REQUEST transaction\n");
488 atom = WDML_MakeAtomFromHsz(hszItem);
489 if (!atom) return NULL;
491 pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_REQUEST, wFmt, hszItem);
494 GlobalDeleteAtom(atom);
498 pXAct->lParam = PackDDElParam(WM_DDE_REQUEST, wFmt, atom);
503 /******************************************************************
504 * WDML_HandleRequestReply
508 static WDML_QUEUE_STATE WDML_HandleRequestReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct)
515 if (WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
518 switch (msg->message)
521 UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
522 FreeDDElParam(WM_DDE_ACK, msg->lParam);
523 GlobalDeleteAtom(uiHi);
524 WDML_ExtractAck(uiLo, &ddeAck);
527 ERR("Positive answer should appear in NACK for a request, assuming negative\n");
528 TRACE("Negative answer...\n");
532 UnpackDDElParam(WM_DDE_DATA, msg->lParam, &uiLo, &uiHi);
533 TRACE("Got the result (%08lx)\n", (DWORD)uiLo);
535 hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
537 if (DdeCmpStringHandles(hsz, pXAct->hszItem) != 0)
540 pXAct->hDdeData = WDML_Global2DataHandle((HGLOBAL)uiLo, &wdh);
543 GlobalFree((HGLOBAL)uiLo);
547 WDML_PostAck(pConv, WDML_CLIENT_SIDE, 0, FALSE, TRUE, uiHi, msg->lParam, WM_DDE_DATA);
551 GlobalDeleteAtom(uiHi);
552 FreeDDElParam(WM_DDE_ACK, msg->lParam);
557 FreeDDElParam(msg->message, msg->lParam);
561 return WDML_QS_HANDLED;
564 /******************************************************************
565 * WDML_BuildExecuteCommand
567 * Creates a DDE block suitable for sending in WM_DDE_COMMAND
568 * It also takes care of string conversion between the two window procedures
570 static HGLOBAL WDML_BuildExecuteCommand(WDML_CONV* pConv, LPCVOID pData, DWORD cbData)
573 BOOL clientUnicode, serverUnicode;
576 clientUnicode = IsWindowUnicode(pConv->hwndClient);
577 serverUnicode = IsWindowUnicode(pConv->hwndServer);
579 if (clientUnicode == serverUnicode)
587 memSize = WideCharToMultiByte( CP_ACP, 0, pData, cbData, NULL, 0, NULL, NULL);
591 memSize = MultiByteToWideChar( CP_ACP, 0, pData, cbData, NULL, 0);
595 hMem = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, memSize);
601 pDst = GlobalLock(hMem);
604 if (clientUnicode == serverUnicode)
606 memcpy(pDst, pData, cbData);
612 WideCharToMultiByte( CP_ACP, 0, pData, cbData, pDst, memSize, NULL, NULL);
616 MultiByteToWideChar( CP_ACP, 0, pData, cbData, (LPWSTR)pDst, memSize);
631 /******************************************************************
632 * WDML_ClientQueueExecute
636 static WDML_XACT* WDML_ClientQueueExecute(WDML_CONV* pConv, LPCVOID pData, DWORD cbData)
640 TRACE("XTYP_EXECUTE transaction\n");
642 pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_EXECUTE, 0, 0);
646 if (cbData == (DWORD)-1)
648 HDDEDATA hDdeData = (HDDEDATA)pData;
650 pData = DdeAccessData(hDdeData, &cbData);
653 pXAct->hMem = WDML_BuildExecuteCommand(pConv, pData, cbData);
654 DdeUnaccessData(hDdeData);
659 pXAct->hMem = WDML_BuildExecuteCommand(pConv, pData, cbData);
662 pXAct->lParam = (LPARAM)pXAct->hMem;
667 /******************************************************************
668 * WDML_HandleExecuteReply
672 static WDML_QUEUE_STATE WDML_HandleExecuteReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct)
677 if (msg->message != WM_DDE_ACK || WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
682 UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
683 FreeDDElParam(WM_DDE_ACK, msg->lParam);
685 if ((HANDLE)uiHi != pXAct->hMem)
690 WDML_ExtractAck(uiLo, &ddeAck);
691 pXAct->hDdeData = (HDDEDATA)(UINT_PTR)ddeAck.fAck;
693 return WDML_QS_HANDLED;
696 /******************************************************************
697 * WDML_ClientQueuePoke
701 static WDML_XACT* WDML_ClientQueuePoke(WDML_CONV* pConv, LPCVOID pData, DWORD cbData,
702 UINT wFmt, HSZ hszItem)
707 TRACE("XTYP_POKE transaction\n");
709 atom = WDML_MakeAtomFromHsz(hszItem);
710 if (!atom) return NULL;
712 pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_POKE, wFmt, hszItem);
715 GlobalDeleteAtom(atom);
719 if (cbData == (DWORD)-1)
721 pXAct->hMem = (HDDEDATA)pData;
727 pXAct->hMem = GlobalAlloc(GHND | GMEM_DDESHARE, sizeof(DDEPOKE) + cbData);
728 ddePoke = GlobalLock(pXAct->hMem);
731 memcpy(ddePoke->Value, pData, cbData);
732 ddePoke->fRelease = FALSE; /* FIXME: app owned ? */
733 ddePoke->cfFormat = wFmt;
734 GlobalUnlock(pXAct->hMem);
738 pXAct->lParam = PackDDElParam(WM_DDE_POKE, (UINT)pXAct->hMem, atom);
743 /******************************************************************
744 * WDML_HandlePokeReply
748 static WDML_QUEUE_STATE WDML_HandlePokeReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct)
754 if (msg->message != WM_DDE_ACK && WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
759 UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
760 hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
761 if (DdeCmpStringHandles(hsz, pXAct->hszItem) != 0)
765 FreeDDElParam(WM_DDE_ACK, msg->lParam);
766 GlobalDeleteAtom(uiHi);
768 WDML_ExtractAck(uiLo, &ddeAck);
769 GlobalFree(pXAct->hMem);
771 pXAct->hDdeData = (HDDEDATA)TRUE;
775 /******************************************************************
776 * WDML_ClientQueueTerminate
778 * Creates and queue an WM_DDE_TERMINATE transaction
780 static WDML_XACT* WDML_ClientQueueTerminate(WDML_CONV* pConv)
784 pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_TERMINATE, 0, 0);
789 pConv->wStatus &= ~ST_CONNECTED;
794 /******************************************************************
795 * WDML_HandleTerminateReply
797 * handles the reply to a terminate request
799 static WDML_QUEUE_STATE WDML_HandleTerminateReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct)
801 if (msg->message != WM_DDE_TERMINATE)
803 /* FIXME: should delete data passed here */
804 return WDML_QS_SWALLOWED;
807 if (WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
809 FIXME("hmmm shouldn't happen\n");
812 if (!pConv->instance->CBFflags & CBF_SKIP_DISCONNECTS)
814 WDML_InvokeCallback(pConv->instance, XTYP_DISCONNECT, 0, (HCONV)pConv,
815 0, 0, 0, 0, (pConv->wStatus & ST_ISSELF) ? 1 : 0);
817 WDML_RemoveConv(pConv, WDML_CLIENT_SIDE);
818 return WDML_QS_HANDLED;
821 /******************************************************************
822 * WDML_HandleReplyData
826 static WDML_QUEUE_STATE WDML_HandleIncomingData(WDML_CONV* pConv, MSG* msg, HDDEDATA* hdd)
829 HDDEDATA hDdeDataIn, hDdeDataOut;
834 TRACE("WM_DDE_DATA message received in the Client Proc!\n");
835 /* wParam -- sending window handle */
836 /* lParam -- hDdeData & item HSZ */
838 UnpackDDElParam(WM_DDE_DATA, msg->lParam, &uiLo, &uiHi);
839 hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
841 hDdeDataIn = WDML_Global2DataHandle((HGLOBAL)uiLo, &wdh);
844 * For hot link, data should be passed to its callback with
845 * XTYP_ADVDATA and callback should return the proper status.
847 pLink = WDML_FindLink(pConv->instance, (HCONV)pConv, WDML_CLIENT_SIDE, hsz,
848 uiLo ? TRUE : FALSE, wdh.cfFormat);
851 WDML_DecHSZ(pConv->instance, hsz);
852 DdeFreeDataHandle(hDdeDataIn);
856 if (hDdeDataIn != 0 && wdh.fAckReq)
858 WDML_PostAck(pConv, WDML_CLIENT_SIDE, 0, FALSE, TRUE, uiHi, msg->lParam, WM_DDE_DATA);
864 GlobalDeleteAtom(uiHi);
867 hDdeDataOut = WDML_InvokeCallback(pConv->instance, XTYP_ADVDATA, pLink->uFmt, pLink->hConv,
868 pConv->hszTopic, pLink->hszItem, hDdeDataIn, 0, 0);
870 if (hDdeDataOut != (HDDEDATA)DDE_FACK || wdh.fRelease)
872 if (uiLo) GlobalFree((HANDLE)uiLo);
875 DdeFreeDataHandle(hDdeDataIn);
877 WDML_DecHSZ(pConv->instance, hsz);
879 FreeDDElParam(WM_DDE_DATA, msg->lParam);
881 return WDML_QS_HANDLED;
884 /******************************************************************
885 * WDML_HandleIncomingTerminate
889 static WDML_QUEUE_STATE WDML_HandleIncomingTerminate(WDML_CONV* pConv, MSG* msg, HDDEDATA* hdd)
891 if (pConv->hwndServer != WIN_GetFullHandle((HWND)msg->wParam))
894 pConv->wStatus |= ST_TERMINATED;
895 if (!pConv->instance->CBFflags & CBF_SKIP_DISCONNECTS)
897 WDML_InvokeCallback(pConv->instance, XTYP_DISCONNECT, 0, (HCONV)pConv,
898 0, 0, 0, 0, (pConv->wStatus & ST_ISSELF) ? 1 : 0);
900 if (pConv->wStatus & ST_CONNECTED)
902 /* don't care about result code (if server exists or not) */
903 PostMessageA(pConv->hwndServer, WM_DDE_TERMINATE, (WPARAM)pConv->hwndClient, 0L);
904 pConv->wStatus &= ~ST_CONNECTED;
906 /* have to keep connection around to allow reconnection */
907 return WDML_QS_HANDLED;
910 /******************************************************************
913 * handles any incoming reply, and try to match to an already sent request
915 static WDML_QUEUE_STATE WDML_HandleReply(WDML_CONV* pConv, MSG* msg, HDDEDATA* hdd)
917 WDML_XACT* pXAct = pConv->transactions;
920 if (pConv->transactions)
922 /* first check message against a pending transaction, if any */
923 switch (pXAct->ddeMsg)
926 qs = WDML_HandleAdviseReply(pConv, msg, pXAct);
928 case WM_DDE_UNADVISE:
929 qs = WDML_HandleUnadviseReply(pConv, msg, pXAct);
932 qs = WDML_HandleExecuteReply(pConv, msg, pXAct);
935 qs = WDML_HandleRequestReply(pConv, msg, pXAct);
938 qs = WDML_HandlePokeReply(pConv, msg, pXAct);
940 case WM_DDE_TERMINATE:
941 qs = WDML_HandleTerminateReply(pConv, msg, pXAct);
953 /* now check the results */
957 case WDML_QS_SWALLOWED:
960 case WDML_QS_HANDLED:
961 /* ok, we have resolved a pending transaction
962 * notify callback if asynchronous, and remove it in any case
964 WDML_UnQueueTransaction(pConv, pXAct);
965 if (pXAct->dwTimeout == TIMEOUT_ASYNC && pXAct->ddeMsg != WM_DDE_TERMINATE)
967 WDML_InvokeCallback(pConv->instance, XTYP_XACT_COMPLETE, pXAct->wFmt,
968 (HCONV)pConv, pConv->hszTopic, pXAct->hszItem,
969 pXAct->hDdeData, MAKELONG(0, pXAct->xActID), 0 /* FIXME */);
974 *hdd = pXAct->hDdeData;
976 WDML_FreeTransaction(pConv->instance, pXAct, TRUE);
979 /* no pending transaction found, try a warm/hot link or a termination request */
980 switch (msg->message)
983 qs = WDML_HandleIncomingData(pConv, msg, hdd);
985 case WM_DDE_TERMINATE:
986 qs = WDML_HandleIncomingTerminate(pConv, msg, hdd);
991 FIXME("shouldn't be used on client side\n");
998 /******************************************************************
999 * WDML_SyncWaitTransactionReply
1001 * waits until an answer for a sent request is received
1002 * time out is also handled. only used for synchronous transactions
1004 static HDDEDATA WDML_SyncWaitTransactionReply(HCONV hConv, DWORD dwTimeout, WDML_XACT* pXAct)
1010 TRACE("Starting wait for a timeout of %ld ms\n", dwTimeout);
1012 /* FIXME: time 32 bit wrap around */
1013 dwTimeout += GetCurrentTime();
1015 while ((dwTime = GetCurrentTime()) < dwTimeout)
1017 /* we cannot be in the crit sect all the time because when client and server run in a
1018 * single process they need to share the access to the internal data
1020 if (MsgWaitForMultipleObjects(0, NULL, FALSE,
1021 dwTimeout - dwTime, QS_POSTMESSAGE) == WAIT_OBJECT_0)
1028 EnterCriticalSection(&WDML_CritSect);
1030 pConv = WDML_GetConv(hConv, FALSE);
1033 LeaveCriticalSection(&WDML_CritSect);
1034 /* conversation no longer available... return failure */
1037 while (PeekMessageA(&msg, pConv->hwndClient, WM_DDE_FIRST, WM_DDE_LAST, PM_REMOVE))
1039 /* check that either pXAct has been processed or no more xActions are pending */
1040 ret = (pConv->transactions == pXAct);
1041 ret = WDML_HandleReply(pConv, &msg, &hdd) == WDML_QS_HANDLED &&
1042 (pConv->transactions == NULL || ret);
1045 LeaveCriticalSection(&WDML_CritSect);
1053 TRACE("Timeout !!\n");
1055 EnterCriticalSection(&WDML_CritSect);
1057 pConv = WDML_GetConv(hConv, FALSE);
1060 if (pConv->transactions)
1062 switch (pConv->transactions->ddeMsg)
1064 case WM_DDE_ADVISE: err = DMLERR_ADVACKTIMEOUT; break;
1065 case WM_DDE_REQUEST: err = DMLERR_DATAACKTIMEOUT; break;
1066 case WM_DDE_EXECUTE: err = DMLERR_EXECACKTIMEOUT; break;
1067 case WM_DDE_POKE: err = DMLERR_POKEACKTIMEOUT; break;
1068 case WM_DDE_UNADVISE: err = DMLERR_UNADVACKTIMEOUT; break;
1069 default: err = DMLERR_INVALIDPARAMETER; break;
1072 pConv->instance->lastError = err;
1075 LeaveCriticalSection(&WDML_CritSect);
1080 /*****************************************************************
1081 * DdeClientTransaction (USER32.@)
1083 HDDEDATA WINAPI DdeClientTransaction(LPBYTE pData, DWORD cbData, HCONV hConv, HSZ hszItem, UINT wFmt,
1084 UINT wType, DWORD dwTimeout, LPDWORD pdwResult)
1088 HDDEDATA hDdeData = 0;
1090 TRACE("(%p,%ld,%p,%p,%d,%d,%ld,%p)\n",
1091 pData, cbData, hConv, hszItem, wFmt, wType, dwTimeout, pdwResult);
1095 ERR("Invalid conversation handle\n");
1099 EnterCriticalSection(&WDML_CritSect);
1101 pConv = WDML_GetConv(hConv, TRUE);
1104 /* cannot set error... cannot get back to DDE instance */
1111 if (hszItem != 0 || wFmt != 0)
1113 pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
1116 pXAct = WDML_ClientQueueExecute(pConv, pData, cbData);
1119 pXAct = WDML_ClientQueuePoke(pConv, pData, cbData, wFmt, hszItem);
1121 case XTYP_ADVSTART|XTYPF_NODATA:
1122 case XTYP_ADVSTART|XTYPF_NODATA|XTYPF_ACKREQ:
1124 case XTYP_ADVSTART|XTYPF_ACKREQ:
1127 pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
1130 pXAct = WDML_ClientQueueAdvise(pConv, wType, wFmt, hszItem);
1135 pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
1138 pXAct = WDML_ClientQueueUnadvise(pConv, wFmt, hszItem);
1143 pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
1146 pXAct = WDML_ClientQueueRequest(pConv, wFmt, hszItem);
1149 FIXME("Unknown transation\n");
1150 /* unknown transaction type */
1151 pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
1157 pConv->instance->lastError = DMLERR_MEMORY_ERROR;
1161 WDML_QueueTransaction(pConv, pXAct);
1163 if (!PostMessageA(pConv->hwndServer, pXAct->ddeMsg, (WPARAM)pConv->hwndClient, pXAct->lParam))
1165 TRACE("Failed posting message %d to %p (error=0x%lx)\n",
1166 pXAct->ddeMsg, pConv->hwndServer, GetLastError());
1167 pConv->wStatus &= ~ST_CONNECTED;
1168 WDML_UnQueueTransaction(pConv, pXAct);
1169 WDML_FreeTransaction(pConv->instance, pXAct, TRUE);
1172 pXAct->dwTimeout = dwTimeout;
1173 /* FIXME: should set the app bits on *pdwResult */
1175 if (dwTimeout == TIMEOUT_ASYNC)
1179 *pdwResult = MAKELONG(0, pXAct->xActID);
1181 hDdeData = (HDDEDATA)1;
1191 count = WDML_CritSect.RecursionCount;
1192 for (i = 0; i < count; i++)
1193 LeaveCriticalSection(&WDML_CritSect);
1194 hDdeData = WDML_SyncWaitTransactionReply((HCONV)pConv, dwTimeout, pXAct);
1195 for (i = 0; i < count; i++)
1196 EnterCriticalSection(&WDML_CritSect);
1198 LeaveCriticalSection(&WDML_CritSect);
1202 LeaveCriticalSection(&WDML_CritSect);
1206 /*****************************************************************
1207 * DdeAbandonTransaction (USER32.@)
1209 BOOL WINAPI DdeAbandonTransaction(DWORD idInst, HCONV hConv, DWORD idTransaction)
1211 WDML_INSTANCE* pInstance;
1215 TRACE("(%08lx,%08lx,%08ld);\n", idInst, (DWORD)hConv, idTransaction);
1217 EnterCriticalSection(&WDML_CritSect);
1218 if ((pInstance = WDML_GetInstance(idInst)))
1222 if ((pConv = WDML_GetConv(hConv, TRUE)) && pConv->instance == pInstance)
1224 for (pXAct = pConv->transactions; pXAct; pXAct = pXAct->next)
1226 if (pXAct->dwTimeout == TIMEOUT_ASYNC &&
1227 (idTransaction == 0 || pXAct->xActID == idTransaction))
1229 WDML_UnQueueTransaction(pConv, pXAct);
1230 WDML_FreeTransaction(pInstance, pXAct, TRUE);
1237 for (pConv = pInstance->convs[WDML_CLIENT_SIDE]; pConv; pConv = pConv->next)
1239 if (!(pConv->wStatus & ST_CONNECTED)) continue;
1240 for (pXAct = pConv->transactions; pXAct; pXAct = pXAct->next)
1242 if (pXAct->dwTimeout == TIMEOUT_ASYNC)
1244 WDML_UnQueueTransaction(pConv, pXAct);
1245 WDML_FreeTransaction(pInstance, pXAct, TRUE);
1251 LeaveCriticalSection(&WDML_CritSect);
1256 /******************************************************************
1259 * Window Proc created on client side for each conversation
1261 static LRESULT CALLBACK WDML_ClientProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
1264 WDML_CONV* pConv = NULL;
1267 if (iMsg == WM_DDE_ACK &&
1268 /* in the initial WM_INITIATE sendmessage */
1269 ((pConv = WDML_GetConvFromWnd(hwnd)) == NULL || pConv->wStatus == XST_INIT1))
1271 /* In response to WM_DDE_INITIATE, save server window */
1273 WDML_INSTANCE* pInstance;
1275 /* note: sent messages do not need packing */
1276 uiLo = LOWORD(lParam);
1277 uiHi = HIWORD(lParam);
1279 /* FIXME: convlist should be handled here */
1282 /* we already have started the conv with a server, drop other replies */
1283 GlobalDeleteAtom(uiLo);
1284 GlobalDeleteAtom(uiHi);
1285 PostMessageA((HWND)wParam, WM_DDE_TERMINATE, (WPARAM)hwnd, 0);
1289 pInstance = WDML_GetInstanceFromWnd(hwnd);
1291 hszSrv = WDML_MakeHszFromAtom(pInstance, uiLo);
1292 hszTpc = WDML_MakeHszFromAtom(pInstance, uiHi);
1294 pConv = WDML_AddConv(pInstance, WDML_CLIENT_SIDE, hszSrv, hszTpc, hwnd, (HWND)wParam);
1296 SetWindowLongA(hwnd, GWL_WDML_CONVERSATION, (DWORD)pConv);
1297 pConv->wStatus |= ST_CONNECTED;
1298 pConv->wConvst = XST_INIT1;
1300 /* check if server is handled by DDEML */
1301 if ((GetClassNameA((HWND)wParam, buf, sizeof(buf)) &&
1302 strcmp(buf, WDML_szServerConvClassA) == 0) ||
1303 (GetClassNameW((HWND)wParam, (LPWSTR)buf, sizeof(buf)/sizeof(WCHAR)) &&
1304 lstrcmpW((LPWSTR)buf, WDML_szServerConvClassW) == 0))
1306 pConv->wStatus |= ST_ISLOCAL;
1309 WDML_BroadcastDDEWindows(WDML_szEventClass, WM_WDML_CONNECT_CONFIRM, (WPARAM)hwnd, wParam);
1311 GlobalDeleteAtom(uiLo);
1312 GlobalDeleteAtom(uiHi);
1314 /* accept conversation */
1318 if (iMsg >= WM_DDE_FIRST && iMsg <= WM_DDE_LAST)
1320 EnterCriticalSection(&WDML_CritSect);
1322 pConv = WDML_GetConvFromWnd(hwnd);
1331 msg.wParam = wParam;
1332 msg.lParam = lParam;
1334 WDML_HandleReply(pConv, &msg, &hdd);
1337 LeaveCriticalSection(&WDML_CritSect);
1341 return (IsWindowUnicode(hwnd)) ?
1342 DefWindowProcA(hwnd, iMsg, wParam, lParam) : DefWindowProcW(hwnd, iMsg, wParam, lParam);
1345 /*****************************************************************
1346 * DdeDisconnect (USER32.@)
1348 BOOL WINAPI DdeDisconnect(HCONV hConv)
1350 WDML_CONV* pConv = NULL;
1355 TRACE("(%ld)\n", (DWORD)hConv);
1359 ERR("DdeDisconnect(): hConv = 0\n");
1363 EnterCriticalSection(&WDML_CritSect);
1364 pConv = WDML_GetConv(hConv, TRUE);
1367 if (pConv->wStatus & ST_CLIENT)
1369 /* FIXME: should abandon all pending transactions */
1370 pXAct = WDML_ClientQueueTerminate(pConv);
1373 count = WDML_CritSect.RecursionCount;
1374 for (i = 0; i < count; i++)
1375 LeaveCriticalSection(&WDML_CritSect);
1376 if (PostMessageA(pConv->hwndServer, pXAct->ddeMsg,
1377 (WPARAM)pConv->hwndClient, pXAct->lParam))
1378 WDML_SyncWaitTransactionReply(hConv, 10000, pXAct);
1379 for (i = 0; i < count; i++)
1380 EnterCriticalSection(&WDML_CritSect);
1382 WDML_FreeTransaction(pConv->instance, pXAct, TRUE);
1383 /* still have to destroy data assosiated with conversation */
1384 WDML_RemoveConv(pConv, WDML_CLIENT_SIDE);
1388 FIXME("Not implemented yet for a server side conversation\n");
1392 LeaveCriticalSection(&WDML_CritSect);
1397 /*****************************************************************
1398 * DdeImpersonateClient (USER32.@)
1400 BOOL WINAPI DdeImpersonateClient(HCONV hConv)
1405 EnterCriticalSection(&WDML_CritSect);
1406 pConv = WDML_GetConv(hConv, TRUE);
1409 ret = ImpersonateDdeClientWindow(pConv->hwndClient, pConv->hwndServer);
1411 LeaveCriticalSection(&WDML_CritSect);