git.oblomov.eu Git - wine/blob - 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   - implement ResetEnumerator
  35   - string compares should be case-insensitive, the content of the list should be sorted
  36
  37  */
  38 #include "config.h"
  39
  40 #include <stdarg.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43
  44 #define COBJMACROS
  45
  46 #include "wine/debug.h"
  47 #include "windef.h"
  48 #include "winbase.h"
  49 #include "winreg.h"
  50 #include "undocshell.h"
  51 #include "shlwapi.h"
  52 #include "winerror.h"
  53 #include "objbase.h"
  54
  55 #include "pidl.h"
  56 #include "shlobj.h"
  57 #include "shldisp.h"
  58 #include "debughlp.h"
  59
  60 #include "wine/unicode.h"
  61
  62 WINE_DEFAULT_DEBUG_CHANNEL(shell);
  63
  64 typedef struct
  65 {
  66     const IAutoComplete2Vtbl  *lpVtbl;
  67     const IAutoCompleteDropDownVtbl *lpDropDownVtbl;
  68     LONG ref;
  69     BOOL  enabled;
  70     HWND hwndEdit;
  71     HWND hwndListBox;
  72     WNDPROC wpOrigEditProc;
  73     WNDPROC wpOrigLBoxProc;
  74     WCHAR *txtbackup;
  75     WCHAR *quickComplete;
  76     IEnumString *enumstr;
  77     AUTOCOMPLETEOPTIONS options;
  78 } IAutoCompleteImpl;
  79
  80 static const IAutoComplete2Vtbl acvt;
  81 static const IAutoCompleteDropDownVtbl acdropdownvt;
  82
  83
  84 /*
  85   converts This to an interface pointer
  86 */
  87 #define _IUnknown_(This)              ((IUnknown*)&(This)->lpVtbl)
  88 #define _IAutoComplete2_(This)        ((IAutoComplete2*)&(This)->lpVtbl)
  89 #define _IAutoCompleteDropDown_(This) (&(This)->lpDropDownVtbl)
  90
  91 static inline IAutoCompleteImpl *impl_from_IAutoCompleteDropDown(IAutoCompleteDropDown *iface)
  92 {
  93     return (IAutoCompleteImpl *)((char *)iface - FIELD_OFFSET(IAutoCompleteImpl, lpDropDownVtbl));
  94 }
  95
  96 static LRESULT APIENTRY ACEditSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
  97 static LRESULT APIENTRY ACLBoxSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
  98
  99 static void create_listbox(IAutoCompleteImpl *This)
 100 {
 101     HWND hwndParent;
 102
 103     hwndParent = GetParent(This->hwndEdit);
 104
 105     /* FIXME : The listbox should be resizable with the mouse. WS_THICKFRAME looks ugly */
 106     This->hwndListBox = CreateWindowExW(0, WC_LISTBOXW, NULL,
 107                                     WS_BORDER | WS_CHILD | WS_VSCROLL | LBS_HASSTRINGS | LBS_NOTIFY | LBS_NOINTEGRALHEIGHT,
 108                                     CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
 109                                     hwndParent, NULL,
 110                                     (HINSTANCE)GetWindowLongPtrW( hwndParent, GWLP_HINSTANCE ), NULL);
 111
 112     if (This->hwndListBox) {
 113         This->wpOrigLBoxProc = (WNDPROC) SetWindowLongPtrW( This->hwndListBox, GWLP_WNDPROC, (LONG_PTR) ACLBoxSubclassProc);
 114         SetWindowLongPtrW( This->hwndListBox, GWLP_USERDATA, (LONG_PTR)This);
 115     }
 116 }
 117
 118 /**************************************************************************
 119  *  IAutoComplete_Constructor
 120  */
 121 HRESULT WINAPI IAutoComplete_Constructor(IUnknown * pUnkOuter, REFIID riid, LPVOID * ppv)
 122 {
 123     IAutoCompleteImpl *lpac;
 124
 125     if (pUnkOuter && !IsEqualIID (riid, &IID_IUnknown))
 126         return CLASS_E_NOAGGREGATION;
 127
 128     lpac = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IAutoCompleteImpl));
 129     if (!lpac)
 130         return E_OUTOFMEMORY;
 131
 132     lpac->ref = 1;
 133     lpac->lpVtbl = &acvt;
 134     lpac->lpDropDownVtbl = &acdropdownvt;
 135     lpac->enabled = TRUE;
 136     lpac->enumstr = NULL;
 137     lpac->options = ACO_AUTOAPPEND;
 138     lpac->wpOrigEditProc = NULL;
 139     lpac->hwndListBox = NULL;
 140     lpac->txtbackup = NULL;
 141     lpac->quickComplete = NULL;
 142
 143     if (FAILED (IUnknown_QueryInterface (_IUnknown_ (lpac), riid, ppv))) {
 144         IUnknown_Release (_IUnknown_ (lpac));
 145         return E_NOINTERFACE;
 146     }
 147
 148     TRACE("-- (%p)->\n",lpac);
 149
 150     return S_OK;
 151 }
 152
 153 /**************************************************************************
 154  *  AutoComplete_QueryInterface
 155  */
 156 static HRESULT WINAPI IAutoComplete2_fnQueryInterface(
 157     IAutoComplete2 * iface,
 158     REFIID riid,
 159     LPVOID *ppvObj)
 160 {
 161     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 162
 163     TRACE("(%p)->(\n\tIID:\t%s,%p)\n", This, shdebugstr_guid(riid), ppvObj);
 164     *ppvObj = NULL;
 165
 166     if (IsEqualIID(riid, &IID_IUnknown) ||
 167         IsEqualIID(riid, &IID_IAutoComplete) ||
 168         IsEqualIID(riid, &IID_IAutoComplete2))
 169     {
 170         *ppvObj = This;
 171     }
 172     else if (IsEqualIID(riid, &IID_IAutoCompleteDropDown))
 173     {
 174         *ppvObj = _IAutoCompleteDropDown_(This);
 175     }
 176
 177     if (*ppvObj)
 178     {
 179         IUnknown_AddRef((IUnknown*)*ppvObj);
 180         TRACE("-- Interface: (%p)->(%p)\n", ppvObj, *ppvObj);
 181         return S_OK;
 182     }
 183     WARN("unsupported interface: %s\n", debugstr_guid(riid));
 184     return E_NOINTERFACE;
 185 }
 186
 187 /******************************************************************************
 188  * IAutoComplete2_fnAddRef
 189  */
 190 static ULONG WINAPI IAutoComplete2_fnAddRef(
 191         IAutoComplete2 * iface)
 192 {
 193     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 194     ULONG refCount = InterlockedIncrement(&This->ref);
 195
 196     TRACE("(%p)->(%u)\n", This, refCount - 1);
 197
 198     return refCount;
 199 }
 200
 201 /******************************************************************************
 202  * IAutoComplete2_fnRelease
 203  */
 204 static ULONG WINAPI IAutoComplete2_fnRelease(
 205         IAutoComplete2 * iface)
 206 {
 207     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 208     ULONG refCount = InterlockedDecrement(&This->ref);
 209
 210     TRACE("(%p)->(%u)\n", This, refCount + 1);
 211
 212     if (!refCount) {
 213         TRACE(" destroying IAutoComplete(%p)\n",This);
 214         HeapFree(GetProcessHeap(), 0, This->quickComplete);
 215         HeapFree(GetProcessHeap(), 0, This->txtbackup);
 216         if (This->hwndListBox)
 217             DestroyWindow(This->hwndListBox);
 218         if (This->enumstr)
 219             IEnumString_Release(This->enumstr);
 220         HeapFree(GetProcessHeap(), 0, This);
 221     }
 222     return refCount;
 223 }
 224
 225 /******************************************************************************
 226  * IAutoComplete2_fnEnable
 227  */
 228 static HRESULT WINAPI IAutoComplete2_fnEnable(
 229     IAutoComplete2 * iface,
 230     BOOL fEnable)
 231 {
 232     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 233
 234     HRESULT hr = S_OK;
 235
 236     TRACE("(%p)->(%s)\n", This, (fEnable)?"true":"false");
 237
 238     This->enabled = fEnable;
 239
 240     return hr;
 241 }
 242
 243 /******************************************************************************
 244  * IAutoComplete2_fnInit
 245  */
 246 static HRESULT WINAPI IAutoComplete2_fnInit(
 247     IAutoComplete2 * iface,
 248     HWND hwndEdit,
 249     IUnknown *punkACL,
 250     LPCOLESTR pwzsRegKeyPath,
 251     LPCOLESTR pwszQuickComplete)
 252 {
 253     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 254
 255     TRACE("(%p)->(0x%08lx, %p, %s, %s)\n",
 256           This, (long)hwndEdit, punkACL, debugstr_w(pwzsRegKeyPath), debugstr_w(pwszQuickComplete));
 257
 258     if (This->options & ACO_SEARCH) FIXME(" ACO_SEARCH not supported\n");
 259     if (This->options & ACO_FILTERPREFIXES) FIXME(" ACO_FILTERPREFIXES not supported\n");
 260     if (This->options & ACO_USETAB) FIXME(" ACO_USETAB not supported\n");
 261     if (This->options & ACO_RTLREADING) FIXME(" ACO_RTLREADING not supported\n");
 262
 263     This->hwndEdit = hwndEdit;
 264
 265     if (FAILED (IUnknown_QueryInterface (punkACL, &IID_IEnumString, (LPVOID*)&This->enumstr))) {
 266         TRACE("No IEnumString interface\n");
 267         return  E_NOINTERFACE;
 268     }
 269
 270     This->wpOrigEditProc = (WNDPROC) SetWindowLongPtrW( hwndEdit, GWLP_WNDPROC, (LONG_PTR) ACEditSubclassProc);
 271     SetWindowLongPtrW( hwndEdit, GWLP_USERDATA, (LONG_PTR)This);
 272
 273     if (This->options & ACO_AUTOSUGGEST)
 274         create_listbox(This);
 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  *  IAutoComplete2_fnGetOptions
 317  */
 318 static HRESULT WINAPI IAutoComplete2_fnGetOptions(
 319     IAutoComplete2 * iface,
 320     DWORD *pdwFlag)
 321 {
 322     HRESULT hr = S_OK;
 323
 324     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 325
 326     TRACE("(%p) -> (%p)\n", This, pdwFlag);
 327
 328     *pdwFlag = This->options;
 329
 330     return hr;
 331 }
 332
 333 /**************************************************************************
 334  *  IAutoComplete2_fnSetOptions
 335  */
 336 static HRESULT WINAPI IAutoComplete2_fnSetOptions(
 337     IAutoComplete2 * iface,
 338     DWORD dwFlag)
 339 {
 340     HRESULT hr = S_OK;
 341
 342     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 343
 344     TRACE("(%p) -> (0x%x)\n", This, dwFlag);
 345
 346     This->options = dwFlag;
 347
 348     if ((This->options & ACO_AUTOSUGGEST) && This->hwndEdit && !This->hwndListBox)
 349         create_listbox(This);
 350
 351     return hr;
 352 }
 353
 354 /**************************************************************************
 355  *  IAutoCompleteDropDown_fnGetDropDownStatus
 356  */
 357 static HRESULT WINAPI IAutoCompleteDropDown_fnGetDropDownStatus(
 358     IAutoCompleteDropDown *iface,
 359     DWORD *pdwFlags,
 360     LPWSTR *ppwszString)
 361 {
 362     IAutoCompleteImpl *This = impl_from_IAutoCompleteDropDown(iface);
 363     BOOL dropped;
 364
 365     TRACE("(%p) -> (%p, %p)\n", This, pdwFlags, ppwszString);
 366
 367     dropped = IsWindowVisible(This->hwndListBox);
 368
 369     if (pdwFlags)
 370         *pdwFlags = (dropped ? ACDD_VISIBLE : 0);
 371
 372     if (ppwszString) {
 373         if (dropped) {
 374             int sel;
 375
 376             sel = SendMessageW(This->hwndListBox, LB_GETCURSEL, 0, 0);
 377             if (sel >= 0)
 378             {
 379                 DWORD len;
 380
 381                 len = SendMessageW(This->hwndListBox, LB_GETTEXTLEN, sel, 0);
 382                 *ppwszString = CoTaskMemAlloc((len+1)*sizeof(WCHAR));
 383                 SendMessageW(This->hwndListBox, LB_GETTEXT, sel, (LPARAM)*ppwszString);
 384             }
 385             else
 386                 *ppwszString = NULL;
 387         }
 388         else
 389             *ppwszString = NULL;
 390     }
 391
 392     return S_OK;
 393 }
 394
 395 /**************************************************************************
 396  *  IAutoCompleteDropDown_fnResetEnumarator
 397  */
 398 static HRESULT WINAPI IAutoCompleteDropDown_fnResetEnumerator(
 399     IAutoCompleteDropDown *iface)
 400 {
 401     IAutoCompleteImpl *This = impl_from_IAutoCompleteDropDown(iface);
 402
 403     FIXME("(%p): stub\n", This);
 404
 405     return E_NOTIMPL;
 406 }
 407
 408
 409
 410 /**************************************************************************
 411  *  IAutoComplete2 VTable
 412  */
 413 static const IAutoComplete2Vtbl acvt =
 414 {
 415     IAutoComplete2_fnQueryInterface,
 416     IAutoComplete2_fnAddRef,
 417     IAutoComplete2_fnRelease,
 418     IAutoComplete2_fnInit,
 419     IAutoComplete2_fnEnable,
 420     /* IAutoComplete2 */
 421     IAutoComplete2_fnSetOptions,
 422     IAutoComplete2_fnGetOptions,
 423 };
 424
 425
 426 static HRESULT WINAPI IAutoCompleteDropDown_fnQueryInterface(IAutoCompleteDropDown *iface,
 427             REFIID riid, LPVOID *ppvObj)
 428 {
 429     IAutoCompleteImpl *This = impl_from_IAutoCompleteDropDown(iface);
 430     return IAutoComplete2_fnQueryInterface(_IAutoComplete2_(This), riid, ppvObj);
 431 }
 432
 433 static ULONG WINAPI IAutoCompleteDropDown_fnAddRef(IAutoCompleteDropDown *iface)
 434 {
 435     IAutoCompleteImpl *This = impl_from_IAutoCompleteDropDown(iface);
 436     return IAutoComplete2_fnAddRef(_IAutoComplete2_(This));
 437 }
 438
 439 static ULONG WINAPI IAutoCompleteDropDown_fnRelease(IAutoCompleteDropDown *iface)
 440 {
 441     IAutoCompleteImpl *This = impl_from_IAutoCompleteDropDown(iface);
 442     return IAutoComplete2_fnRelease(_IAutoComplete2_(This));
 443 }
 444
 445 /**************************************************************************
 446  *  IAutoCompleteDropDown VTable
 447  */
 448 static const IAutoCompleteDropDownVtbl acdropdownvt =
 449 {
 450     IAutoCompleteDropDown_fnQueryInterface,
 451     IAutoCompleteDropDown_fnAddRef,
 452     IAutoCompleteDropDown_fnRelease,
 453     IAutoCompleteDropDown_fnGetDropDownStatus,
 454     IAutoCompleteDropDown_fnResetEnumerator,
 455 };
 456
 457 /*
 458   Window procedure for autocompletion
 459  */
 460 static LRESULT APIENTRY ACEditSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 461 {
 462     IAutoCompleteImpl *This = (IAutoCompleteImpl *)GetWindowLongPtrW(hwnd, GWLP_USERDATA);
 463     LPOLESTR strs;
 464     HRESULT hr;
 465     WCHAR hwndText[255];
 466     WCHAR *hwndQCText;
 467     RECT r;
 468     BOOL control, filled, displayall = FALSE;
 469     int cpt, height, sel;
 470
 471     if (!This->enabled) return CallWindowProcW(This->wpOrigEditProc, hwnd, uMsg, wParam, lParam);
 472
 473     switch (uMsg)
 474     {
 475         case CB_SHOWDROPDOWN:
 476             ShowWindow(This->hwndListBox, SW_HIDE);
 477             break;
 478         case WM_KILLFOCUS:
 479             if ((This->options & ACO_AUTOSUGGEST) &&
 480                 ((HWND)wParam != This->hwndListBox))
 481             {
 482                 ShowWindow(This->hwndListBox, SW_HIDE);
 483             }
 484             return CallWindowProcW(This->wpOrigEditProc, hwnd, uMsg, wParam, lParam);
 485         case WM_KEYUP:
 486             GetWindowTextW( hwnd, hwndText, 255);
 487
 488             switch(wParam) {
 489                 case VK_RETURN:
 490                     /* If quickComplete is set and control is pressed, replace the string */
 491                     control = GetKeyState(VK_CONTROL) & 0x8000;
 492                     if (control && This->quickComplete) {
 493                         hwndQCText = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
 494                                                        (lstrlenW(This->quickComplete)+lstrlenW(hwndText))*sizeof(WCHAR));
 495                         sel = sprintfW(hwndQCText, This->quickComplete, hwndText);
 496                         SendMessageW(hwnd, WM_SETTEXT, 0, (LPARAM)hwndQCText);
 497                         SendMessageW(hwnd, EM_SETSEL, 0, sel);
 498                         HeapFree(GetProcessHeap(), 0, hwndQCText);
 499                     }
 500
 501                     ShowWindow(This->hwndListBox, SW_HIDE);
 502                     return 0;
 503                 case VK_LEFT:
 504                 case VK_RIGHT:
 505                     return 0;
 506                 case VK_UP:
 507                 case VK_DOWN:
 508                     /* Two cases here :
 509                        - if the listbox is not visible, displays it
 510                        with all the entries if the style ACO_UPDOWNKEYDROPSLIST
 511                        is present but does not select anything.
 512                        - if the listbox is visible, change the selection
 513                     */
 514                     if ( (This->options & (ACO_AUTOSUGGEST | ACO_UPDOWNKEYDROPSLIST))
 515                          && (!IsWindowVisible(This->hwndListBox) && (! *hwndText)) )
 516                     {
 517                          /* We must display all the entries */
 518                          displayall = TRUE;
 519                     } else {
 520                         if (IsWindowVisible(This->hwndListBox)) {
 521                             int count;
 522
 523                             count = SendMessageW(This->hwndListBox, LB_GETCOUNT, 0, 0);
 524                             /* Change the selection */
 525                             sel = SendMessageW(This->hwndListBox, LB_GETCURSEL, 0, 0);
 526                             if (wParam == VK_UP)
 527                                 sel = ((sel-1)<0)?count-1:sel-1;
 528                             else
 529                                 sel = ((sel+1)>= count)?-1:sel+1;
 530                             SendMessageW(This->hwndListBox, LB_SETCURSEL, sel, 0);
 531                             if (sel != -1) {
 532                                 WCHAR *msg;
 533                                 int len;
 534
 535                                 len = SendMessageW(This->hwndListBox, LB_GETTEXTLEN, sel, 0);
 536                                 msg = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (len+1)*sizeof(WCHAR));
 537                                 SendMessageW(This->hwndListBox, LB_GETTEXT, sel, (LPARAM)msg);
 538                                 SendMessageW(hwnd, WM_SETTEXT, 0, (LPARAM)msg);
 539                                 SendMessageW(hwnd, EM_SETSEL, lstrlenW(msg), lstrlenW(msg));
 540                                 HeapFree(GetProcessHeap(), 0, msg);
 541                             } else {
 542                                 SendMessageW(hwnd, WM_SETTEXT, 0, (LPARAM)This->txtbackup);
 543                                 SendMessageW(hwnd, EM_SETSEL, lstrlenW(This->txtbackup), lstrlenW(This->txtbackup));
 544                             }
 545                         }
 546                         return 0;
 547                     }
 548                     break;
 549                 case VK_BACK:
 550                 case VK_DELETE:
 551                     if ((! *hwndText) && (This->options & ACO_AUTOSUGGEST)) {
 552                         ShowWindow(This->hwndListBox, SW_HIDE);
 553                         return CallWindowProcW(This->wpOrigEditProc, hwnd, uMsg, wParam, lParam);
 554                     }
 555                     if (This->options & ACO_AUTOAPPEND) {
 556                         DWORD b;
 557                         SendMessageW(hwnd, EM_GETSEL, (WPARAM)&b, 0);
 558                         if (b>1) {
 559                             hwndText[b-1] = '\0';
 560                         } else {
 561                             hwndText[0] = '\0';
 562                             SetWindowTextW(hwnd, hwndText);
 563                         }
 564                     }
 565                     break;
 566                 default:
 567                     ;
 568             }
 569
 570             SendMessageW(This->hwndListBox, LB_RESETCONTENT, 0, 0);
 571
 572             HeapFree(GetProcessHeap(), 0, This->txtbackup);
 573             This->txtbackup = HeapAlloc(GetProcessHeap(),
 574                                                  HEAP_ZERO_MEMORY, (lstrlenW(hwndText)+1)*sizeof(WCHAR));
 575             lstrcpyW(This->txtbackup, hwndText);
 576
 577             /* Returns if there is no text to search and we doesn't want to display all the entries */
 578             if ((!displayall) && (! *hwndText) )
 579                 break;
 580
 581             IEnumString_Reset(This->enumstr);
 582             filled = FALSE;
 583             for(cpt = 0;;) {
 584                 ULONG fetched;
 585                 hr = IEnumString_Next(This->enumstr, 1, &strs, &fetched);
 586                 if (hr != S_OK)
 587                     break;
 588
 589                 if (strstrW(strs, hwndText) == strs) {
 590                     if (!filled && (This->options & ACO_AUTOAPPEND)) {
 591                         SetWindowTextW(hwnd, strs);
 592                         SendMessageW(hwnd, EM_SETSEL, lstrlenW(hwndText), lstrlenW(strs));
 593                         if (!(This->options & ACO_AUTOSUGGEST))
 594                             break;
 595                     }
 596
 597                     if (This->options & ACO_AUTOSUGGEST) {
 598                         SendMessageW(This->hwndListBox, LB_ADDSTRING, 0, (LPARAM)strs);
 599                         cpt++;
 600                     }
 601
 602                     filled = TRUE;
 603                 }
 604             }
 605
 606             if (This->options & ACO_AUTOSUGGEST) {
 607                 if (filled) {
 608                     height = SendMessageW(This->hwndListBox, LB_GETITEMHEIGHT, 0, 0);
 609                     SendMessageW(This->hwndListBox, LB_CARETOFF, 0, 0);
 610                     GetWindowRect(hwnd, &r);
 611                     SetParent(This->hwndListBox, HWND_DESKTOP);
 612                     /* It seems that Windows XP displays 7 lines at most
 613                        and otherwise displays a vertical scroll bar */
 614                     SetWindowPos(This->hwndListBox, HWND_TOP,
 615                                  r.left, r.bottom + 1, r.right - r.left, min(height * 7, height*(cpt+1)),
 616                                  SWP_SHOWWINDOW );
 617                 } else {
 618                     ShowWindow(This->hwndListBox, SW_HIDE);
 619                 }
 620             }
 621
 622             break;
 623         default:
 624             return CallWindowProcW(This->wpOrigEditProc, hwnd, uMsg, wParam, lParam);
 625
 626     }
 627
 628     return 0;
 629 }
 630
 631 static LRESULT APIENTRY ACLBoxSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 632 {
 633     IAutoCompleteImpl *This = (IAutoCompleteImpl *)GetWindowLongPtrW(hwnd, GWLP_USERDATA);
 634     WCHAR *msg;
 635     int sel, len;
 636
 637     switch (uMsg) {
 638         case WM_MOUSEMOVE:
 639             sel = SendMessageW(hwnd, LB_ITEMFROMPOINT, 0, lParam);
 640             SendMessageW(hwnd, LB_SETCURSEL, sel, 0);
 641             break;
 642         case WM_LBUTTONDOWN:
 643             sel = SendMessageW(hwnd, LB_GETCURSEL, 0, 0);
 644             if (sel < 0)
 645                 break;
 646             len = SendMessageW(This->hwndListBox, LB_GETTEXTLEN, sel, 0);
 647             msg = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (len+1)*sizeof(WCHAR));
 648             SendMessageW(hwnd, LB_GETTEXT, sel, (LPARAM)msg);
 649             SendMessageW(This->hwndEdit, WM_SETTEXT, 0, (LPARAM)msg);
 650             SendMessageW(This->hwndEdit, EM_SETSEL, 0, lstrlenW(msg));
 651             ShowWindow(hwnd, SW_HIDE);
 652             HeapFree(GetProcessHeap(), 0, msg);
 653             break;
 654         default:
 655             return CallWindowProcW(This->wpOrigLBoxProc, hwnd, uMsg, wParam, lParam);
 656     }
 657     return 0;
 658 }