dlls/shell32/autocomplete.c

   1 /*
   2  *      AutoComplete interfaces implementation.
   3  *
   4  *      Copyright 2004  Maxime Bellengé <maxime.bellenge@laposte.net>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 /*
  22   Implemented:
  23   - ACO_AUTOAPPEND style
  24   - ACO_AUTOSUGGEST style
  25   - ACO_UPDOWNKEYDROPSLIST style
  26
  27   - Handle pwzsRegKeyPath and pwszQuickComplete in Init
  28
  29   TODO:
  30   - implement ACO_SEARCH style
  31   - implement ACO_FILTERPREFIXES style
  32   - implement ACO_USETAB style
  33   - implement ACO_RTLREADING style
  34
  35  */
  36 #include "config.h"
  37
  38 #include <stdarg.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41
  42 #define COBJMACROS
  43
  44 #include "wine/debug.h"
  45 #include "windef.h"
  46 #include "winbase.h"
  47 #include "winreg.h"
  48 #include "undocshell.h"
  49 #include "shlwapi.h"
  50 #include "winerror.h"
  51 #include "objbase.h"
  52
  53 #include "pidl.h"
  54 #include "shlguid.h"
  55 #include "shlobj.h"
  56 #include "shldisp.h"
  57 #include "debughlp.h"
  58
  59 #include "wine/unicode.h"
  60
  61 WINE_DEFAULT_DEBUG_CHANNEL(shell);
  62
  63 typedef struct
  64 {
  65     const IAutoCompleteVtbl  *lpVtbl;
  66     const IAutoComplete2Vtbl *lpvtblAutoComplete2;
  67     LONG ref;
  68     BOOL  enabled;
  69     HWND hwndEdit;
  70     HWND hwndListBox;
  71     WNDPROC wpOrigEditProc;
  72     WNDPROC wpOrigLBoxProc;
  73     WCHAR *txtbackup;
  74     WCHAR *quickComplete;
  75     IEnumString *enumstr;
  76     AUTOCOMPLETEOPTIONS options;
  77 } IAutoCompleteImpl;
  78
  79 static const IAutoCompleteVtbl acvt;
  80 static const IAutoComplete2Vtbl ac2vt;
  81
  82 #define _IAutoComplete2_Offset ((int)(&(((IAutoCompleteImpl*)0)->lpvtblAutoComplete2)))
  83 #define _ICOM_THIS_From_IAutoComplete2(class, name) class* This = (class*)(((char*)name)-_IAutoComplete2_Offset);
  84
  85 /*
  86   converts This to an interface pointer
  87 */
  88 #define _IUnknown_(This) (IUnknown*)&(This->lpVtbl)
  89 #define _IAutoComplete2_(This)  (IAutoComplete2*)&(This->lpvtblAutoComplete2)
  90
  91 static LRESULT APIENTRY ACEditSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
  92 static LRESULT APIENTRY ACLBoxSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
  93
  94 /**************************************************************************
  95  *  IAutoComplete_Constructor
  96  */
  97 HRESULT WINAPI IAutoComplete_Constructor(IUnknown * pUnkOuter, REFIID riid, LPVOID * ppv)
  98 {
  99     IAutoCompleteImpl *lpac;
 100
 101     if (pUnkOuter && !IsEqualIID (riid, &IID_IUnknown))
 102         return CLASS_E_NOAGGREGATION;
 103
 104     lpac = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IAutoCompleteImpl));
 105     if (!lpac)
 106         return E_OUTOFMEMORY;
 107
 108     lpac->ref = 1;
 109     lpac->lpVtbl = &acvt;
 110     lpac->lpvtblAutoComplete2 = &ac2vt;
 111     lpac->enabled = TRUE;
 112     lpac->enumstr = NULL;
 113     lpac->options = ACO_AUTOAPPEND;
 114     lpac->wpOrigEditProc = NULL;
 115     lpac->hwndListBox = NULL;
 116     lpac->txtbackup = NULL;
 117     lpac->quickComplete = NULL;
 118
 119     if (!SUCCEEDED (IUnknown_QueryInterface (_IUnknown_ (lpac), riid, ppv))) {
 120         IUnknown_Release (_IUnknown_ (lpac));
 121         return E_NOINTERFACE;
 122     }
 123
 124     TRACE("-- (%p)->\n",lpac);
 125
 126     return S_OK;
 127 }
 128
 129 /**************************************************************************
 130  *  AutoComplete_QueryInterface
 131  */
 132 static HRESULT WINAPI IAutoComplete_fnQueryInterface(
 133     IAutoComplete * iface,
 134     REFIID riid,
 135     LPVOID *ppvObj)
 136 {
 137     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 138
 139     TRACE("(%p)->(\n\tIID:\t%s,%p)\n", This, shdebugstr_guid(riid), ppvObj);
 140     *ppvObj = NULL;
 141
 142     if(IsEqualIID(riid, &IID_IUnknown))
 143     {
 144         *ppvObj = This;
 145     }
 146     else if(IsEqualIID(riid, &IID_IAutoComplete))
 147     {
 148         *ppvObj = (IAutoComplete*)This;
 149     }
 150     else if(IsEqualIID(riid, &IID_IAutoComplete2))
 151     {
 152         *ppvObj = _IAutoComplete2_ (This);
 153     }
 154
 155     if (*ppvObj)
 156     {
 157         IAutoComplete_AddRef((IAutoComplete*)*ppvObj);
 158         TRACE("-- Interface: (%p)->(%p)\n", ppvObj, *ppvObj);
 159         return S_OK;
 160     }
 161     TRACE("-- Interface: E_NOINTERFACE\n");
 162     return E_NOINTERFACE;
 163 }
 164
 165 /******************************************************************************
 166  * IAutoComplete_fnAddRef
 167  */
 168 static ULONG WINAPI IAutoComplete_fnAddRef(
 169         IAutoComplete * iface)
 170 {
 171     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 172     ULONG refCount = InterlockedIncrement(&This->ref);
 173
 174     TRACE("(%p)->(%lu)\n", This, refCount - 1);
 175
 176     return refCount;
 177 }
 178
 179 /******************************************************************************
 180  * IAutoComplete_fnRelease
 181  */
 182 static ULONG WINAPI IAutoComplete_fnRelease(
 183         IAutoComplete * iface)
 184 {
 185     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 186     ULONG refCount = InterlockedDecrement(&This->ref);
 187
 188     TRACE("(%p)->(%lu)\n", This, refCount + 1);
 189
 190     if (!refCount) {
 191         TRACE(" destroying IAutoComplete(%p)\n",This);
 192         HeapFree(GetProcessHeap(), 0, This->quickComplete);
 193         HeapFree(GetProcessHeap(), 0, This->txtbackup);
 194         if (This->hwndListBox)
 195             DestroyWindow(This->hwndListBox);
 196         if (This->enumstr)
 197             IEnumString_Release(This->enumstr);
 198         HeapFree(GetProcessHeap(), 0, This);
 199     }
 200     return refCount;
 201 }
 202
 203 /******************************************************************************
 204  * IAutoComplete_fnEnable
 205  */
 206 static HRESULT WINAPI IAutoComplete_fnEnable(
 207     IAutoComplete * iface,
 208     BOOL fEnable)
 209 {
 210     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 211
 212     HRESULT hr = S_OK;
 213
 214     TRACE("(%p)->(%s)\n", This, (fEnable)?"true":"false");
 215
 216     This->enabled = fEnable;
 217
 218     return hr;
 219 }
 220
 221 /******************************************************************************
 222  * IAutoComplete_fnInit
 223  */
 224 static HRESULT WINAPI IAutoComplete_fnInit(
 225     IAutoComplete * iface,
 226     HWND hwndEdit,
 227     IUnknown *punkACL,
 228     LPCOLESTR pwzsRegKeyPath,
 229     LPCOLESTR pwszQuickComplete)
 230 {
 231     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 232     static const WCHAR lbName[] = {'L','i','s','t','B','o','x',0};
 233
 234     TRACE("(%p)->(0x%08lx, %p, %s, %s)\n",
 235           This, (long)hwndEdit, punkACL, debugstr_w(pwzsRegKeyPath), debugstr_w(pwszQuickComplete));
 236
 237     if (This->options & ACO_AUTOSUGGEST) TRACE(" ACO_AUTOSUGGEST\n");
 238     if (This->options & ACO_AUTOAPPEND) TRACE(" ACO_AUTOAPPEND\n");
 239     if (This->options & ACO_SEARCH) FIXME(" ACO_SEARCH not supported\n");
 240     if (This->options & ACO_FILTERPREFIXES) FIXME(" ACO_FILTERPREFIXES not supported\n");
 241     if (This->options & ACO_USETAB) FIXME(" ACO_USETAB not supported\n");
 242     if (This->options & ACO_UPDOWNKEYDROPSLIST) TRACE(" ACO_UPDOWNKEYDROPSLIST\n");
 243     if (This->options & ACO_RTLREADING) FIXME(" ACO_RTLREADING not supported\n");
 244
 245     This->hwndEdit = hwndEdit;
 246
 247     if (!SUCCEEDED (IUnknown_QueryInterface (punkACL, &IID_IEnumString, (LPVOID*)&This->enumstr))) {
 248         TRACE("No IEnumString interface\n");
 249         return  E_NOINTERFACE;
 250     }
 251
 252     This->wpOrigEditProc = (WNDPROC) SetWindowLongPtrW( hwndEdit, GWLP_WNDPROC, (LONG_PTR) ACEditSubclassProc);
 253     SetWindowLongPtrW( hwndEdit, GWLP_USERDATA, (LONG_PTR)This);
 254
 255     if (This->options & ACO_AUTOSUGGEST) {
 256         HWND hwndParent;
 257
 258         hwndParent = GetParent(This->hwndEdit);
 259
 260         /* FIXME : The listbox should be resizable with the mouse. WS_THICKFRAME looks ugly */
 261         This->hwndListBox = CreateWindowExW(0, lbName, NULL,
 262                                             WS_BORDER | WS_CHILD | WS_VSCROLL | LBS_HASSTRINGS | LBS_NOTIFY | LBS_NOINTEGRALHEIGHT,
 263                                             CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
 264                                             hwndParent, NULL,
 265                                             (HINSTANCE)GetWindowLongPtrW( hwndParent, GWLP_HINSTANCE ), NULL);
 266
 267         if (This->hwndListBox) {
 268             This->wpOrigLBoxProc = (WNDPROC) SetWindowLongPtrW( This->hwndListBox, GWLP_WNDPROC, (LONG_PTR) ACLBoxSubclassProc);
 269             SetWindowLongPtrW( This->hwndListBox, GWLP_USERDATA, (LONG_PTR)This);
 270         }
 271     }
 272
 273     if (pwzsRegKeyPath) {
 274         WCHAR *key;
 275         WCHAR result[MAX_PATH];
 276         WCHAR *value;
 277         HKEY hKey = 0;
 278         LONG res;
 279         LONG len;
 280
 281         /* pwszRegKeyPath contains the key as well as the value, so we split */
 282         key = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (lstrlenW(pwzsRegKeyPath)+1)*sizeof(WCHAR));
 283         strcpyW(key, pwzsRegKeyPath);
 284         value = strrchrW(key, '\\');
 285         *value = 0;
 286         value++;
 287         /* Now value contains the value and buffer the key */
 288         res = RegOpenKeyExW(HKEY_CURRENT_USER, key, 0, KEY_READ, &hKey);
 289         if (res != ERROR_SUCCESS) {
 290             /* if the key is not found, MSDN states we must seek in HKEY_LOCAL_MACHINE */
 291             res = RegOpenKeyExW(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hKey);
 292         }
 293         if (res == ERROR_SUCCESS) {
 294             res = RegQueryValueW(hKey, value, result, &len);
 295             if (res == ERROR_SUCCESS) {
 296                 This->quickComplete = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, len*sizeof(WCHAR));
 297                 strcpyW(This->quickComplete, result);
 298             }
 299             RegCloseKey(hKey);
 300         }
 301         HeapFree(GetProcessHeap(), 0, key);
 302     }
 303
 304     if ((pwszQuickComplete) && (!This->quickComplete)) {
 305         This->quickComplete = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (lstrlenW(pwszQuickComplete)+1)*sizeof(WCHAR));
 306         lstrcpyW(This->quickComplete, pwszQuickComplete);
 307     }
 308
 309     return S_OK;
 310 }
 311
 312 /**************************************************************************
 313  *  IAutoComplete_fnVTable
 314  */
 315 static const IAutoCompleteVtbl acvt =
 316 {
 317     IAutoComplete_fnQueryInterface,
 318     IAutoComplete_fnAddRef,
 319     IAutoComplete_fnRelease,
 320     IAutoComplete_fnInit,
 321     IAutoComplete_fnEnable,
 322 };
 323
 324 /**************************************************************************
 325  *  AutoComplete2_QueryInterface
 326  */
 327 static HRESULT WINAPI IAutoComplete2_fnQueryInterface(
 328     IAutoComplete2 * iface,
 329     REFIID riid,
 330     LPVOID *ppvObj)
 331 {
 332     _ICOM_THIS_From_IAutoComplete2(IAutoCompleteImpl, iface);
 333
 334     TRACE ("(%p)->(%s,%p)\n", This, shdebugstr_guid (riid), ppvObj);
 335
 336     return IAutoComplete_QueryInterface((IAutoComplete*)This, riid, ppvObj);
 337 }
 338
 339 /******************************************************************************
 340  * IAutoComplete2_fnAddRef
 341  */
 342 static ULONG WINAPI IAutoComplete2_fnAddRef(
 343         IAutoComplete2 * iface)
 344 {
 345     _ICOM_THIS_From_IAutoComplete2(IAutoCompleteImpl,iface);
 346
 347     TRACE ("(%p)->(count=%lu)\n", This, This->ref);
 348
 349     return IAutoComplete2_AddRef((IAutoComplete*)This);
 350 }
 351
 352 /******************************************************************************
 353  * IAutoComplete2_fnRelease
 354  */
 355 static ULONG WINAPI IAutoComplete2_fnRelease(
 356         IAutoComplete2 * iface)
 357 {
 358     _ICOM_THIS_From_IAutoComplete2(IAutoCompleteImpl,iface);
 359
 360     TRACE ("(%p)->(count=%lu)\n", This, This->ref);
 361
 362     return IAutoComplete_Release((IAutoComplete*)This);
 363 }
 364
 365 /******************************************************************************
 366  * IAutoComplete2_fnEnable
 367  */
 368 static HRESULT WINAPI IAutoComplete2_fnEnable(
 369     IAutoComplete2 * iface,
 370     BOOL fEnable)
 371 {
 372     _ICOM_THIS_From_IAutoComplete2(IAutoCompleteImpl, iface);
 373
 374     TRACE ("(%p)->(%s)\n", This, (fEnable)?"true":"false");
 375
 376     return IAutoComplete_Enable((IAutoComplete*)This, fEnable);
 377 }
 378
 379 /******************************************************************************
 380  * IAutoComplete2_fnInit
 381  */
 382 static HRESULT WINAPI IAutoComplete2_fnInit(
 383     IAutoComplete2 * iface,
 384     HWND hwndEdit,
 385     IUnknown *punkACL,
 386     LPCOLESTR pwzsRegKeyPath,
 387     LPCOLESTR pwszQuickComplete)
 388 {
 389     _ICOM_THIS_From_IAutoComplete2(IAutoCompleteImpl, iface);
 390
 391     TRACE("(%p)\n", This);
 392
 393     return IAutoComplete_Init((IAutoComplete*)This, hwndEdit, punkACL, pwzsRegKeyPath, pwszQuickComplete);
 394 }
 395
 396 /**************************************************************************
 397  *  IAutoComplete_fnGetOptions
 398  */
 399 static HRESULT WINAPI IAutoComplete2_fnGetOptions(
 400     IAutoComplete2 * iface,
 401     DWORD *pdwFlag)
 402 {
 403     HRESULT hr = S_OK;
 404
 405     _ICOM_THIS_From_IAutoComplete2(IAutoCompleteImpl, iface);
 406
 407     TRACE("(%p) -> (%p)\n", This, pdwFlag);
 408
 409     *pdwFlag = This->options;
 410
 411     return hr;
 412 }
 413
 414 /**************************************************************************
 415  *  IAutoComplete_fnSetOptions
 416  */
 417 static HRESULT WINAPI IAutoComplete2_fnSetOptions(
 418     IAutoComplete2 * iface,
 419     DWORD dwFlag)
 420 {
 421     HRESULT hr = S_OK;
 422
 423     _ICOM_THIS_From_IAutoComplete2(IAutoCompleteImpl, iface);
 424
 425     TRACE("(%p) -> (0x%lx)\n", This, dwFlag);
 426
 427     This->options = dwFlag;
 428
 429     return hr;
 430 }
 431
 432 /**************************************************************************
 433  *  IAutoComplete2_fnVTable
 434  */
 435 static const IAutoComplete2Vtbl ac2vt =
 436 {
 437     IAutoComplete2_fnQueryInterface,
 438     IAutoComplete2_fnAddRef,
 439     IAutoComplete2_fnRelease,
 440     IAutoComplete2_fnInit,
 441     IAutoComplete2_fnEnable,
 442     /* IAutoComplete2 */
 443     IAutoComplete2_fnSetOptions,
 444     IAutoComplete2_fnGetOptions,
 445 };
 446
 447 /*
 448   Window procedure for autocompletion
 449  */
 450 static LRESULT APIENTRY ACEditSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 451 {
 452     IAutoCompleteImpl *This = (IAutoCompleteImpl *)GetWindowLongPtrW(hwnd, GWLP_USERDATA);
 453     LPOLESTR strs;
 454     HRESULT hr;
 455     WCHAR hwndText[255];
 456     WCHAR *hwndQCText;
 457     RECT r;
 458     BOOL control, filled, displayall = FALSE;
 459     int cpt, height, sel;
 460
 461     if (!This->enabled) return CallWindowProcW(This->wpOrigEditProc, hwnd, uMsg, wParam, lParam);
 462
 463     switch (uMsg)
 464     {
 465         case CB_SHOWDROPDOWN:
 466             ShowWindow(This->hwndListBox, SW_HIDE);
 467             break;
 468         case WM_KILLFOCUS:
 469             if ((This->options && ACO_AUTOSUGGEST) &&
 470                 ((HWND)wParam != This->hwndListBox))
 471             {
 472                 ShowWindow(This->hwndListBox, SW_HIDE);
 473             }
 474             break;
 475         case WM_KEYUP:
 476
 477             GetWindowTextW( hwnd, (LPWSTR)hwndText, 255);
 478
 479             switch(wParam) {
 480                 case VK_RETURN:
 481                     /* If quickComplete is set and control is pressed, replace the string */
 482                     control = GetKeyState(VK_CONTROL) & 0x8000;
 483                     if (control && This->quickComplete) {
 484                         hwndQCText = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
 485                                                        (lstrlenW(This->quickComplete)+lstrlenW(hwndText))*sizeof(WCHAR));
 486                         sel = sprintfW(hwndQCText, This->quickComplete, hwndText);
 487                         SendMessageW(hwnd, WM_SETTEXT, 0, (LPARAM)hwndQCText);
 488                         SendMessageW(hwnd, EM_SETSEL, 0, sel);
 489                         HeapFree(GetProcessHeap(), 0, hwndQCText);
 490                     }
 491
 492                     ShowWindow(This->hwndListBox, SW_HIDE);
 493                     return 0;
 494                 case VK_LEFT:
 495                 case VK_RIGHT:
 496                     return 0;
 497                 case VK_UP:
 498                 case VK_DOWN:
 499                     /* Two cases here :
 500                        - if the listbox is not visible, displays it
 501                        with all the entries if the style ACO_UPDOWNKEYDROPSLIST
 502                        is present but does not select anything.
 503                        - if the listbox is visible, change the selection
 504                     */
 505                     if ( (This->options & (ACO_AUTOSUGGEST | ACO_UPDOWNKEYDROPSLIST))
 506                          && (!IsWindowVisible(This->hwndListBox) && (! *hwndText)) )
 507                     {
 508                          /* We must dispays all the entries */
 509                          displayall = TRUE;
 510                     } else {
 511                         if (IsWindowVisible(This->hwndListBox)) {
 512                             int count;
 513
 514                             count = SendMessageW(This->hwndListBox, LB_GETCOUNT, 0, 0);
 515                             /* Change the selection */
 516                             sel = SendMessageW(This->hwndListBox, LB_GETCURSEL, 0, 0);
 517                             if (wParam == VK_UP)
 518                                 sel = ((sel-1)<0)?count-1:sel-1;
 519                             else
 520                                 sel = ((sel+1)>= count)?-1:sel+1;
 521                             SendMessageW(This->hwndListBox, LB_SETCURSEL, sel, 0);
 522                             if (sel != -1) {
 523                                 WCHAR *msg;
 524                                 int len;
 525
 526                                 len = SendMessageW(This->hwndListBox, LB_GETTEXTLEN, sel, (LPARAM)NULL);
 527                                 msg = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (len+1)*sizeof(WCHAR));
 528                                 SendMessageW(This->hwndListBox, LB_GETTEXT, sel, (LPARAM)msg);
 529                                 SendMessageW(hwnd, WM_SETTEXT, 0, (LPARAM)msg);
 530                                 SendMessageW(hwnd, EM_SETSEL, lstrlenW(msg), lstrlenW(msg));
 531                                 HeapFree(GetProcessHeap(), 0, msg);
 532                             } else {
 533                                 SendMessageW(hwnd, WM_SETTEXT, 0, (LPARAM)This->txtbackup);
 534                                 SendMessageW(hwnd, EM_SETSEL, lstrlenW(This->txtbackup), lstrlenW(This->txtbackup));
 535                             }
 536                         }
 537                         return 0;
 538                     }
 539                     break;
 540                 case VK_BACK:
 541                 case VK_DELETE:
 542                     if ((! *hwndText) && (This->options & ACO_AUTOSUGGEST)) {
 543                         ShowWindow(This->hwndListBox, SW_HIDE);
 544                         return CallWindowProcW(This->wpOrigEditProc, hwnd, uMsg, wParam, lParam);
 545                     }
 546                     if (This->options & ACO_AUTOAPPEND) {
 547                         DWORD b;
 548                         SendMessageW(hwnd, EM_GETSEL, (WPARAM)&b, (LPARAM)NULL);
 549                         if (b>1) {
 550                             hwndText[b-1] = '\0';
 551                         } else {
 552                             hwndText[0] = '\0';
 553                             SetWindowTextW(hwnd, hwndText);
 554                         }
 555                     }
 556                     break;
 557                 default:
 558                     ;
 559             }
 560
 561             SendMessageW(This->hwndListBox, LB_RESETCONTENT, 0, 0);
 562
 563             HeapFree(GetProcessHeap(), 0, This->txtbackup);
 564             This->txtbackup = HeapAlloc(GetProcessHeap(),
 565                                                  HEAP_ZERO_MEMORY, (lstrlenW(hwndText)+1)*sizeof(WCHAR));
 566             lstrcpyW(This->txtbackup, hwndText);
 567
 568             /* Returns if there is no text to search and we doesn't want to display all the entries */
 569             if ((!displayall) && (! *hwndText) )
 570                 break;
 571
 572             IEnumString_Reset(This->enumstr);
 573             filled = FALSE;
 574             for(cpt = 0;;) {
 575                 hr = IEnumString_Next(This->enumstr, 1, &strs, NULL);
 576                 if (hr != S_OK)
 577                     break;
 578
 579                 if ((LPWSTR)strstrW(strs, hwndText) == strs) {
 580
 581                     if (This->options & ACO_AUTOAPPEND) {
 582                         SetWindowTextW(hwnd, strs);
 583                         SendMessageW(hwnd, EM_SETSEL, lstrlenW(hwndText), lstrlenW(strs));
 584                         break;
 585                     }
 586
 587                     if (This->options & ACO_AUTOSUGGEST) {
 588                         SendMessageW(This->hwndListBox, LB_ADDSTRING, 0, (LPARAM)strs);
 589                         filled = TRUE;
 590                         cpt++;
 591                     }
 592                 }
 593             }
 594
 595             if (This->options & ACO_AUTOSUGGEST) {
 596                 if (filled) {
 597                     height = SendMessageW(This->hwndListBox, LB_GETITEMHEIGHT, 0, 0);
 598                     SendMessageW(This->hwndListBox, LB_CARETOFF, 0, 0);
 599                     GetWindowRect(hwnd, &r);
 600                     SetParent(This->hwndListBox, HWND_DESKTOP);
 601                     /* It seems that Windows XP displays 7 lines at most
 602                        and otherwise displays a vertical scroll bar */
 603                     SetWindowPos(This->hwndListBox, HWND_TOP,
 604                                  r.left, r.bottom + 1, r.right - r.left, min(height * 7, height*(cpt+1)),
 605                                  SWP_SHOWWINDOW );
 606                 } else {
 607                     ShowWindow(This->hwndListBox, SW_HIDE);
 608                 }
 609             }
 610
 611             break;
 612         default:
 613             return CallWindowProcW(This->wpOrigEditProc, hwnd, uMsg, wParam, lParam);
 614
 615     }
 616
 617     return 0;
 618 }
 619
 620 static LRESULT APIENTRY ACLBoxSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 621 {
 622     IAutoCompleteImpl *This = (IAutoCompleteImpl *)GetWindowLongPtrW(hwnd, GWLP_USERDATA);
 623     WCHAR *msg;
 624     int sel = -1, len;
 625
 626     switch (uMsg) {
 627         case WM_MOUSEMOVE:
 628             sel = SendMessageW(hwnd, LB_ITEMFROMPOINT, 0, lParam);
 629             SendMessageW(hwnd, LB_SETCURSEL, (WPARAM)sel, (LPARAM)0);
 630             break;
 631         case WM_LBUTTONDOWN:
 632             len = SendMessageW(This->hwndListBox, LB_GETTEXTLEN, sel, (LPARAM)NULL);
 633             msg = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (len+1)*sizeof(WCHAR));
 634             sel = (INT)SendMessageW(hwnd, LB_GETCURSEL, 0, 0);
 635             SendMessageW(hwnd, LB_GETTEXT, sel, (LPARAM)msg);
 636             SendMessageW(This->hwndEdit, WM_SETTEXT, 0, (LPARAM)msg);
 637             SendMessageW(This->hwndEdit, EM_SETSEL, 0, lstrlenW(msg));
 638             ShowWindow(hwnd, SW_HIDE);
 639             HeapFree(GetProcessHeap(), 0, msg);
 640             break;
 641         default:
 642             return CallWindowProcW(This->wpOrigLBoxProc, hwnd, uMsg, wParam, lParam);
 643     }
 644     return 0;
 645 }