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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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 static inline IAutoCompleteImpl *impl_from_IAutoComplete2( IAutoComplete2 *iface )
  83 {
  84     return (IAutoCompleteImpl *)((char*)iface - FIELD_OFFSET(IAutoCompleteImpl, lpvtblAutoComplete2));
  85 }
  86
  87
  88 /*
  89   converts This to an interface pointer
  90 */
  91 #define _IUnknown_(This) (IUnknown*)&(This->lpVtbl)
  92 #define _IAutoComplete2_(This)  (IAutoComplete2*)&(This->lpvtblAutoComplete2)
  93
  94 static LRESULT APIENTRY ACEditSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
  95 static LRESULT APIENTRY ACLBoxSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
  96
  97 /**************************************************************************
  98  *  IAutoComplete_Constructor
  99  */
 100 HRESULT WINAPI IAutoComplete_Constructor(IUnknown * pUnkOuter, REFIID riid, LPVOID * ppv)
 101 {
 102     IAutoCompleteImpl *lpac;
 103
 104     if (pUnkOuter && !IsEqualIID (riid, &IID_IUnknown))
 105         return CLASS_E_NOAGGREGATION;
 106
 107     lpac = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IAutoCompleteImpl));
 108     if (!lpac)
 109         return E_OUTOFMEMORY;
 110
 111     lpac->ref = 1;
 112     lpac->lpVtbl = &acvt;
 113     lpac->lpvtblAutoComplete2 = &ac2vt;
 114     lpac->enabled = TRUE;
 115     lpac->enumstr = NULL;
 116     lpac->options = ACO_AUTOAPPEND;
 117     lpac->wpOrigEditProc = NULL;
 118     lpac->hwndListBox = NULL;
 119     lpac->txtbackup = NULL;
 120     lpac->quickComplete = NULL;
 121
 122     if (!SUCCEEDED (IUnknown_QueryInterface (_IUnknown_ (lpac), riid, ppv))) {
 123         IUnknown_Release (_IUnknown_ (lpac));
 124         return E_NOINTERFACE;
 125     }
 126
 127     TRACE("-- (%p)->\n",lpac);
 128
 129     return S_OK;
 130 }
 131
 132 /**************************************************************************
 133  *  AutoComplete_QueryInterface
 134  */
 135 static HRESULT WINAPI IAutoComplete_fnQueryInterface(
 136     IAutoComplete * iface,
 137     REFIID riid,
 138     LPVOID *ppvObj)
 139 {
 140     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 141
 142     TRACE("(%p)->(\n\tIID:\t%s,%p)\n", This, shdebugstr_guid(riid), ppvObj);
 143     *ppvObj = NULL;
 144
 145     if(IsEqualIID(riid, &IID_IUnknown))
 146     {
 147         *ppvObj = This;
 148     }
 149     else if(IsEqualIID(riid, &IID_IAutoComplete))
 150     {
 151         *ppvObj = (IAutoComplete*)This;
 152     }
 153     else if(IsEqualIID(riid, &IID_IAutoComplete2))
 154     {
 155         *ppvObj = _IAutoComplete2_ (This);
 156     }
 157
 158     if (*ppvObj)
 159     {
 160         IAutoComplete_AddRef((IAutoComplete*)*ppvObj);
 161         TRACE("-- Interface: (%p)->(%p)\n", ppvObj, *ppvObj);
 162         return S_OK;
 163     }
 164     TRACE("-- Interface: E_NOINTERFACE\n");
 165     return E_NOINTERFACE;
 166 }
 167
 168 /******************************************************************************
 169  * IAutoComplete_fnAddRef
 170  */
 171 static ULONG WINAPI IAutoComplete_fnAddRef(
 172         IAutoComplete * iface)
 173 {
 174     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 175     ULONG refCount = InterlockedIncrement(&This->ref);
 176
 177     TRACE("(%p)->(%lu)\n", This, refCount - 1);
 178
 179     return refCount;
 180 }
 181
 182 /******************************************************************************
 183  * IAutoComplete_fnRelease
 184  */
 185 static ULONG WINAPI IAutoComplete_fnRelease(
 186         IAutoComplete * iface)
 187 {
 188     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 189     ULONG refCount = InterlockedDecrement(&This->ref);
 190
 191     TRACE("(%p)->(%lu)\n", This, refCount + 1);
 192
 193     if (!refCount) {
 194         TRACE(" destroying IAutoComplete(%p)\n",This);
 195         HeapFree(GetProcessHeap(), 0, This->quickComplete);
 196         HeapFree(GetProcessHeap(), 0, This->txtbackup);
 197         if (This->hwndListBox)
 198             DestroyWindow(This->hwndListBox);
 199         if (This->enumstr)
 200             IEnumString_Release(This->enumstr);
 201         HeapFree(GetProcessHeap(), 0, This);
 202     }
 203     return refCount;
 204 }
 205
 206 /******************************************************************************
 207  * IAutoComplete_fnEnable
 208  */
 209 static HRESULT WINAPI IAutoComplete_fnEnable(
 210     IAutoComplete * iface,
 211     BOOL fEnable)
 212 {
 213     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 214
 215     HRESULT hr = S_OK;
 216
 217     TRACE("(%p)->(%s)\n", This, (fEnable)?"true":"false");
 218
 219     This->enabled = fEnable;
 220
 221     return hr;
 222 }
 223
 224 /******************************************************************************
 225  * IAutoComplete_fnInit
 226  */
 227 static HRESULT WINAPI IAutoComplete_fnInit(
 228     IAutoComplete * iface,
 229     HWND hwndEdit,
 230     IUnknown *punkACL,
 231     LPCOLESTR pwzsRegKeyPath,
 232     LPCOLESTR pwszQuickComplete)
 233 {
 234     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 235     static const WCHAR lbName[] = {'L','i','s','t','B','o','x',0};
 236
 237     TRACE("(%p)->(0x%08lx, %p, %s, %s)\n",
 238           This, (long)hwndEdit, punkACL, debugstr_w(pwzsRegKeyPath), debugstr_w(pwszQuickComplete));
 239
 240     if (This->options & ACO_AUTOSUGGEST) TRACE(" ACO_AUTOSUGGEST\n");
 241     if (This->options & ACO_AUTOAPPEND) TRACE(" ACO_AUTOAPPEND\n");
 242     if (This->options & ACO_SEARCH) FIXME(" ACO_SEARCH not supported\n");
 243     if (This->options & ACO_FILTERPREFIXES) FIXME(" ACO_FILTERPREFIXES not supported\n");
 244     if (This->options & ACO_USETAB) FIXME(" ACO_USETAB not supported\n");
 245     if (This->options & ACO_UPDOWNKEYDROPSLIST) TRACE(" ACO_UPDOWNKEYDROPSLIST\n");
 246     if (This->options & ACO_RTLREADING) FIXME(" ACO_RTLREADING not supported\n");
 247
 248     This->hwndEdit = hwndEdit;
 249
 250     if (!SUCCEEDED (IUnknown_QueryInterface (punkACL, &IID_IEnumString, (LPVOID*)&This->enumstr))) {
 251         TRACE("No IEnumString interface\n");
 252         return  E_NOINTERFACE;
 253     }
 254
 255     This->wpOrigEditProc = (WNDPROC) SetWindowLongPtrW( hwndEdit, GWLP_WNDPROC, (LONG_PTR) ACEditSubclassProc);
 256     SetWindowLongPtrW( hwndEdit, GWLP_USERDATA, (LONG_PTR)This);
 257
 258     if (This->options & ACO_AUTOSUGGEST) {
 259         HWND hwndParent;
 260
 261         hwndParent = GetParent(This->hwndEdit);
 262
 263         /* FIXME : The listbox should be resizable with the mouse. WS_THICKFRAME looks ugly */
 264         This->hwndListBox = CreateWindowExW(0, lbName, NULL,
 265                                             WS_BORDER | WS_CHILD | WS_VSCROLL | LBS_HASSTRINGS | LBS_NOTIFY | LBS_NOINTEGRALHEIGHT,
 266                                             CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
 267                                             hwndParent, NULL,
 268                                             (HINSTANCE)GetWindowLongPtrW( hwndParent, GWLP_HINSTANCE ), NULL);
 269
 270         if (This->hwndListBox) {
 271             This->wpOrigLBoxProc = (WNDPROC) SetWindowLongPtrW( This->hwndListBox, GWLP_WNDPROC, (LONG_PTR) ACLBoxSubclassProc);
 272             SetWindowLongPtrW( This->hwndListBox, GWLP_USERDATA, (LONG_PTR)This);
 273         }
 274     }
 275
 276     if (pwzsRegKeyPath) {
 277         WCHAR *key;
 278         WCHAR result[MAX_PATH];
 279         WCHAR *value;
 280         HKEY hKey = 0;
 281         LONG res;
 282         LONG len;
 283
 284         /* pwszRegKeyPath contains the key as well as the value, so we split */
 285         key = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (lstrlenW(pwzsRegKeyPath)+1)*sizeof(WCHAR));
 286         strcpyW(key, pwzsRegKeyPath);
 287         value = strrchrW(key, '\\');
 288         *value = 0;
 289         value++;
 290         /* Now value contains the value and buffer the key */
 291         res = RegOpenKeyExW(HKEY_CURRENT_USER, key, 0, KEY_READ, &hKey);
 292         if (res != ERROR_SUCCESS) {
 293             /* if the key is not found, MSDN states we must seek in HKEY_LOCAL_MACHINE */
 294             res = RegOpenKeyExW(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hKey);
 295         }
 296         if (res == ERROR_SUCCESS) {
 297             res = RegQueryValueW(hKey, value, result, &len);
 298             if (res == ERROR_SUCCESS) {
 299                 This->quickComplete = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, len*sizeof(WCHAR));
 300                 strcpyW(This->quickComplete, result);
 301             }
 302             RegCloseKey(hKey);
 303         }
 304         HeapFree(GetProcessHeap(), 0, key);
 305     }
 306
 307     if ((pwszQuickComplete) && (!This->quickComplete)) {
 308         This->quickComplete = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (lstrlenW(pwszQuickComplete)+1)*sizeof(WCHAR));
 309         lstrcpyW(This->quickComplete, pwszQuickComplete);
 310     }
 311
 312     return S_OK;
 313 }
 314
 315 /**************************************************************************
 316  *  IAutoComplete_fnVTable
 317  */
 318 static const IAutoCompleteVtbl acvt =
 319 {
 320     IAutoComplete_fnQueryInterface,
 321     IAutoComplete_fnAddRef,
 322     IAutoComplete_fnRelease,
 323     IAutoComplete_fnInit,
 324     IAutoComplete_fnEnable,
 325 };
 326
 327 /**************************************************************************
 328  *  AutoComplete2_QueryInterface
 329  */
 330 static HRESULT WINAPI IAutoComplete2_fnQueryInterface(
 331     IAutoComplete2 * iface,
 332     REFIID riid,
 333     LPVOID *ppvObj)
 334 {
 335     IAutoCompleteImpl *This = impl_from_IAutoComplete2(iface);
 336
 337     TRACE ("(%p)->(%s,%p)\n", This, shdebugstr_guid (riid), ppvObj);
 338
 339     return IAutoComplete_QueryInterface((IAutoComplete*)This, riid, ppvObj);
 340 }
 341
 342 /******************************************************************************
 343  * IAutoComplete2_fnAddRef
 344  */
 345 static ULONG WINAPI IAutoComplete2_fnAddRef(
 346         IAutoComplete2 * iface)
 347 {
 348     IAutoCompleteImpl *This = impl_from_IAutoComplete2(iface);
 349
 350     TRACE ("(%p)->(count=%lu)\n", This, This->ref);
 351
 352     return IAutoComplete2_AddRef((IAutoComplete*)This);
 353 }
 354
 355 /******************************************************************************
 356  * IAutoComplete2_fnRelease
 357  */
 358 static ULONG WINAPI IAutoComplete2_fnRelease(
 359         IAutoComplete2 * iface)
 360 {
 361     IAutoCompleteImpl *This = impl_from_IAutoComplete2(iface);
 362
 363     TRACE ("(%p)->(count=%lu)\n", This, This->ref);
 364
 365     return IAutoComplete_Release((IAutoComplete*)This);
 366 }
 367
 368 /******************************************************************************
 369  * IAutoComplete2_fnEnable
 370  */
 371 static HRESULT WINAPI IAutoComplete2_fnEnable(
 372     IAutoComplete2 * iface,
 373     BOOL fEnable)
 374 {
 375     IAutoCompleteImpl *This = impl_from_IAutoComplete2(iface);
 376
 377     TRACE ("(%p)->(%s)\n", This, (fEnable)?"true":"false");
 378
 379     return IAutoComplete_Enable((IAutoComplete*)This, fEnable);
 380 }
 381
 382 /******************************************************************************
 383  * IAutoComplete2_fnInit
 384  */
 385 static HRESULT WINAPI IAutoComplete2_fnInit(
 386     IAutoComplete2 * iface,
 387     HWND hwndEdit,
 388     IUnknown *punkACL,
 389     LPCOLESTR pwzsRegKeyPath,
 390     LPCOLESTR pwszQuickComplete)
 391 {
 392     IAutoCompleteImpl *This = impl_from_IAutoComplete2(iface);
 393
 394     TRACE("(%p)\n", This);
 395
 396     return IAutoComplete_Init((IAutoComplete*)This, hwndEdit, punkACL, pwzsRegKeyPath, pwszQuickComplete);
 397 }
 398
 399 /**************************************************************************
 400  *  IAutoComplete_fnGetOptions
 401  */
 402 static HRESULT WINAPI IAutoComplete2_fnGetOptions(
 403     IAutoComplete2 * iface,
 404     DWORD *pdwFlag)
 405 {
 406     HRESULT hr = S_OK;
 407
 408     IAutoCompleteImpl *This = impl_from_IAutoComplete2(iface);
 409
 410     TRACE("(%p) -> (%p)\n", This, pdwFlag);
 411
 412     *pdwFlag = This->options;
 413
 414     return hr;
 415 }
 416
 417 /**************************************************************************
 418  *  IAutoComplete_fnSetOptions
 419  */
 420 static HRESULT WINAPI IAutoComplete2_fnSetOptions(
 421     IAutoComplete2 * iface,
 422     DWORD dwFlag)
 423 {
 424     HRESULT hr = S_OK;
 425
 426     IAutoCompleteImpl *This = impl_from_IAutoComplete2(iface);
 427
 428     TRACE("(%p) -> (0x%lx)\n", This, dwFlag);
 429
 430     This->options = dwFlag;
 431
 432     return hr;
 433 }
 434
 435 /**************************************************************************
 436  *  IAutoComplete2_fnVTable
 437  */
 438 static const IAutoComplete2Vtbl ac2vt =
 439 {
 440     IAutoComplete2_fnQueryInterface,
 441     IAutoComplete2_fnAddRef,
 442     IAutoComplete2_fnRelease,
 443     IAutoComplete2_fnInit,
 444     IAutoComplete2_fnEnable,
 445     /* IAutoComplete2 */
 446     IAutoComplete2_fnSetOptions,
 447     IAutoComplete2_fnGetOptions,
 448 };
 449
 450 /*
 451   Window procedure for autocompletion
 452  */
 453 static LRESULT APIENTRY ACEditSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 454 {
 455     IAutoCompleteImpl *This = (IAutoCompleteImpl *)GetWindowLongPtrW(hwnd, GWLP_USERDATA);
 456     LPOLESTR strs;
 457     HRESULT hr;
 458     WCHAR hwndText[255];
 459     WCHAR *hwndQCText;
 460     RECT r;
 461     BOOL control, filled, displayall = FALSE;
 462     int cpt, height, sel;
 463
 464     if (!This->enabled) return CallWindowProcW(This->wpOrigEditProc, hwnd, uMsg, wParam, lParam);
 465
 466     switch (uMsg)
 467     {
 468         case CB_SHOWDROPDOWN:
 469             ShowWindow(This->hwndListBox, SW_HIDE);
 470             break;
 471         case WM_KILLFOCUS:
 472             if ((This->options && ACO_AUTOSUGGEST) &&
 473                 ((HWND)wParam != This->hwndListBox))
 474             {
 475                 ShowWindow(This->hwndListBox, SW_HIDE);
 476             }
 477             break;
 478         case WM_KEYUP:
 479
 480             GetWindowTextW( hwnd, (LPWSTR)hwndText, 255);
 481
 482             switch(wParam) {
 483                 case VK_RETURN:
 484                     /* If quickComplete is set and control is pressed, replace the string */
 485                     control = GetKeyState(VK_CONTROL) & 0x8000;
 486                     if (control && This->quickComplete) {
 487                         hwndQCText = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
 488                                                        (lstrlenW(This->quickComplete)+lstrlenW(hwndText))*sizeof(WCHAR));
 489                         sel = sprintfW(hwndQCText, This->quickComplete, hwndText);
 490                         SendMessageW(hwnd, WM_SETTEXT, 0, (LPARAM)hwndQCText);
 491                         SendMessageW(hwnd, EM_SETSEL, 0, sel);
 492                         HeapFree(GetProcessHeap(), 0, hwndQCText);
 493                     }
 494
 495                     ShowWindow(This->hwndListBox, SW_HIDE);
 496                     return 0;
 497                 case VK_LEFT:
 498                 case VK_RIGHT:
 499                     return 0;
 500                 case VK_UP:
 501                 case VK_DOWN:
 502                     /* Two cases here :
 503                        - if the listbox is not visible, displays it
 504                        with all the entries if the style ACO_UPDOWNKEYDROPSLIST
 505                        is present but does not select anything.
 506                        - if the listbox is visible, change the selection
 507                     */
 508                     if ( (This->options & (ACO_AUTOSUGGEST | ACO_UPDOWNKEYDROPSLIST))
 509                          && (!IsWindowVisible(This->hwndListBox) && (! *hwndText)) )
 510                     {
 511                          /* We must dispays all the entries */
 512                          displayall = TRUE;
 513                     } else {
 514                         if (IsWindowVisible(This->hwndListBox)) {
 515                             int count;
 516
 517                             count = SendMessageW(This->hwndListBox, LB_GETCOUNT, 0, 0);
 518                             /* Change the selection */
 519                             sel = SendMessageW(This->hwndListBox, LB_GETCURSEL, 0, 0);
 520                             if (wParam == VK_UP)
 521                                 sel = ((sel-1)<0)?count-1:sel-1;
 522                             else
 523                                 sel = ((sel+1)>= count)?-1:sel+1;
 524                             SendMessageW(This->hwndListBox, LB_SETCURSEL, sel, 0);
 525                             if (sel != -1) {
 526                                 WCHAR *msg;
 527                                 int len;
 528
 529                                 len = SendMessageW(This->hwndListBox, LB_GETTEXTLEN, sel, (LPARAM)NULL);
 530                                 msg = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (len+1)*sizeof(WCHAR));
 531                                 SendMessageW(This->hwndListBox, LB_GETTEXT, sel, (LPARAM)msg);
 532                                 SendMessageW(hwnd, WM_SETTEXT, 0, (LPARAM)msg);
 533                                 SendMessageW(hwnd, EM_SETSEL, lstrlenW(msg), lstrlenW(msg));
 534                                 HeapFree(GetProcessHeap(), 0, msg);
 535                             } else {
 536                                 SendMessageW(hwnd, WM_SETTEXT, 0, (LPARAM)This->txtbackup);
 537                                 SendMessageW(hwnd, EM_SETSEL, lstrlenW(This->txtbackup), lstrlenW(This->txtbackup));
 538                             }
 539                         }
 540                         return 0;
 541                     }
 542                     break;
 543                 case VK_BACK:
 544                 case VK_DELETE:
 545                     if ((! *hwndText) && (This->options & ACO_AUTOSUGGEST)) {
 546                         ShowWindow(This->hwndListBox, SW_HIDE);
 547                         return CallWindowProcW(This->wpOrigEditProc, hwnd, uMsg, wParam, lParam);
 548                     }
 549                     if (This->options & ACO_AUTOAPPEND) {
 550                         DWORD b;
 551                         SendMessageW(hwnd, EM_GETSEL, (WPARAM)&b, (LPARAM)NULL);
 552                         if (b>1) {
 553                             hwndText[b-1] = '\0';
 554                         } else {
 555                             hwndText[0] = '\0';
 556                             SetWindowTextW(hwnd, hwndText);
 557                         }
 558                     }
 559                     break;
 560                 default:
 561                     ;
 562             }
 563
 564             SendMessageW(This->hwndListBox, LB_RESETCONTENT, 0, 0);
 565
 566             HeapFree(GetProcessHeap(), 0, This->txtbackup);
 567             This->txtbackup = HeapAlloc(GetProcessHeap(),
 568                                                  HEAP_ZERO_MEMORY, (lstrlenW(hwndText)+1)*sizeof(WCHAR));
 569             lstrcpyW(This->txtbackup, hwndText);
 570
 571             /* Returns if there is no text to search and we doesn't want to display all the entries */
 572             if ((!displayall) && (! *hwndText) )
 573                 break;
 574
 575             IEnumString_Reset(This->enumstr);
 576             filled = FALSE;
 577             for(cpt = 0;;) {
 578                 hr = IEnumString_Next(This->enumstr, 1, &strs, NULL);
 579                 if (hr != S_OK)
 580                     break;
 581
 582                 if ((LPWSTR)strstrW(strs, hwndText) == strs) {
 583
 584                     if (This->options & ACO_AUTOAPPEND) {
 585                         SetWindowTextW(hwnd, strs);
 586                         SendMessageW(hwnd, EM_SETSEL, lstrlenW(hwndText), lstrlenW(strs));
 587                         break;
 588                     }
 589
 590                     if (This->options & ACO_AUTOSUGGEST) {
 591                         SendMessageW(This->hwndListBox, LB_ADDSTRING, 0, (LPARAM)strs);
 592                         filled = TRUE;
 593                         cpt++;
 594                     }
 595                 }
 596             }
 597
 598             if (This->options & ACO_AUTOSUGGEST) {
 599                 if (filled) {
 600                     height = SendMessageW(This->hwndListBox, LB_GETITEMHEIGHT, 0, 0);
 601                     SendMessageW(This->hwndListBox, LB_CARETOFF, 0, 0);
 602                     GetWindowRect(hwnd, &r);
 603                     SetParent(This->hwndListBox, HWND_DESKTOP);
 604                     /* It seems that Windows XP displays 7 lines at most
 605                        and otherwise displays a vertical scroll bar */
 606                     SetWindowPos(This->hwndListBox, HWND_TOP,
 607                                  r.left, r.bottom + 1, r.right - r.left, min(height * 7, height*(cpt+1)),
 608                                  SWP_SHOWWINDOW );
 609                 } else {
 610                     ShowWindow(This->hwndListBox, SW_HIDE);
 611                 }
 612             }
 613
 614             break;
 615         default:
 616             return CallWindowProcW(This->wpOrigEditProc, hwnd, uMsg, wParam, lParam);
 617
 618     }
 619
 620     return 0;
 621 }
 622
 623 static LRESULT APIENTRY ACLBoxSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 624 {
 625     IAutoCompleteImpl *This = (IAutoCompleteImpl *)GetWindowLongPtrW(hwnd, GWLP_USERDATA);
 626     WCHAR *msg;
 627     int sel = -1, len;
 628
 629     switch (uMsg) {
 630         case WM_MOUSEMOVE:
 631             sel = SendMessageW(hwnd, LB_ITEMFROMPOINT, 0, lParam);
 632             SendMessageW(hwnd, LB_SETCURSEL, (WPARAM)sel, (LPARAM)0);
 633             break;
 634         case WM_LBUTTONDOWN:
 635             len = SendMessageW(This->hwndListBox, LB_GETTEXTLEN, sel, (LPARAM)NULL);
 636             msg = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (len+1)*sizeof(WCHAR));
 637             sel = (INT)SendMessageW(hwnd, LB_GETCURSEL, 0, 0);
 638             SendMessageW(hwnd, LB_GETTEXT, sel, (LPARAM)msg);
 639             SendMessageW(This->hwndEdit, WM_SETTEXT, 0, (LPARAM)msg);
 640             SendMessageW(This->hwndEdit, EM_SETSEL, 0, lstrlenW(msg));
 641             ShowWindow(hwnd, SW_HIDE);
 642             HeapFree(GetProcessHeap(), 0, msg);
 643             break;
 644         default:
 645             return CallWindowProcW(This->wpOrigLBoxProc, hwnd, uMsg, wParam, lParam);
 646     }
 647     return 0;
 648 }