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 #include "shell32_main.h"
  60
  61 #include "wine/unicode.h"
  62
  63 WINE_DEFAULT_DEBUG_CHANNEL(shell);
  64
  65 typedef struct
  66 {
  67     const IAutoComplete2Vtbl  *lpVtbl;
  68     const IAutoCompleteDropDownVtbl *lpDropDownVtbl;
  69     LONG ref;
  70     BOOL initialized;
  71     BOOL enabled;
  72     HWND hwndEdit;
  73     HWND hwndListBox;
  74     WNDPROC wpOrigEditProc;
  75     WNDPROC wpOrigLBoxProc;
  76     WCHAR *txtbackup;
  77     WCHAR *quickComplete;
  78     IEnumString *enumstr;
  79     AUTOCOMPLETEOPTIONS options;
  80 } IAutoCompleteImpl;
  81
  82 static const IAutoComplete2Vtbl acvt;
  83 static const IAutoCompleteDropDownVtbl acdropdownvt;
  84
  85 static const WCHAR autocomplete_propertyW[] = {'W','i','n','e',' ','A','u','t','o',
  86                                                'c','o','m','p','l','e','t','e',' ',
  87                                                'c','o','n','t','r','o','l',0};
  88 /*
  89   converts This to an interface pointer
  90 */
  91 #define _IUnknown_(This)              ((IUnknown*)&(This)->lpVtbl)
  92 #define _IAutoComplete2_(This)        ((IAutoComplete2*)&(This)->lpVtbl)
  93 #define _IAutoCompleteDropDown_(This) (&(This)->lpDropDownVtbl)
  94
  95 static inline IAutoCompleteImpl *impl_from_IAutoCompleteDropDown(IAutoCompleteDropDown *iface)
  96 {
  97     return (IAutoCompleteImpl *)((char *)iface - FIELD_OFFSET(IAutoCompleteImpl, lpDropDownVtbl));
  98 }
  99
 100 static LRESULT APIENTRY ACEditSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
 101 static LRESULT APIENTRY ACLBoxSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
 102
 103 static void create_listbox(IAutoCompleteImpl *This)
 104 {
 105     HWND hwndParent;
 106
 107     hwndParent = GetParent(This->hwndEdit);
 108
 109     /* FIXME : The listbox should be resizable with the mouse. WS_THICKFRAME looks ugly */
 110     This->hwndListBox = CreateWindowExW(0, WC_LISTBOXW, NULL,
 111                                     WS_BORDER | WS_CHILD | WS_VSCROLL | LBS_HASSTRINGS | LBS_NOTIFY | LBS_NOINTEGRALHEIGHT,
 112                                     CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
 113                                     hwndParent, NULL, shell32_hInstance, NULL );
 114
 115     if (This->hwndListBox) {
 116         This->wpOrigLBoxProc = (WNDPROC) SetWindowLongPtrW( This->hwndListBox, GWLP_WNDPROC, (LONG_PTR) ACLBoxSubclassProc);
 117         SetWindowLongPtrW( This->hwndListBox, GWLP_USERDATA, (LONG_PTR)This);
 118     }
 119 }
 120
 121 /**************************************************************************
 122  *  IAutoComplete_Constructor
 123  */
 124 HRESULT WINAPI IAutoComplete_Constructor(IUnknown * pUnkOuter, REFIID riid, LPVOID * ppv)
 125 {
 126     IAutoCompleteImpl *lpac;
 127     HRESULT hr;
 128
 129     if (pUnkOuter && !IsEqualIID (riid, &IID_IUnknown))
 130         return CLASS_E_NOAGGREGATION;
 131
 132     lpac = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IAutoCompleteImpl));
 133     if (!lpac)
 134         return E_OUTOFMEMORY;
 135
 136     lpac->ref = 1;
 137     lpac->lpVtbl = &acvt;
 138     lpac->lpDropDownVtbl = &acdropdownvt;
 139     lpac->enabled = TRUE;
 140     lpac->options = ACO_AUTOAPPEND;
 141
 142     hr = IUnknown_QueryInterface(_IUnknown_ (lpac), riid, ppv);
 143     IUnknown_Release(_IUnknown_ (lpac));
 144
 145     TRACE("-- (%p)->\n",lpac);
 146
 147     return hr;
 148 }
 149
 150 /**************************************************************************
 151  *  AutoComplete_QueryInterface
 152  */
 153 static HRESULT WINAPI IAutoComplete2_fnQueryInterface(
 154     IAutoComplete2 * iface,
 155     REFIID riid,
 156     LPVOID *ppvObj)
 157 {
 158     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 159
 160     TRACE("(%p)->(IID:%s,%p)\n", This, shdebugstr_guid(riid), ppvObj);
 161     *ppvObj = NULL;
 162
 163     if (IsEqualIID(riid, &IID_IUnknown) ||
 164         IsEqualIID(riid, &IID_IAutoComplete) ||
 165         IsEqualIID(riid, &IID_IAutoComplete2))
 166     {
 167         *ppvObj = This;
 168     }
 169     else if (IsEqualIID(riid, &IID_IAutoCompleteDropDown))
 170     {
 171         *ppvObj = _IAutoCompleteDropDown_(This);
 172     }
 173
 174     if (*ppvObj)
 175     {
 176         IUnknown_AddRef((IUnknown*)*ppvObj);
 177         TRACE("-- Interface: (%p)->(%p)\n", ppvObj, *ppvObj);
 178         return S_OK;
 179     }
 180     WARN("unsupported interface: %s\n", debugstr_guid(riid));
 181     return E_NOINTERFACE;
 182 }
 183
 184 /******************************************************************************
 185  * IAutoComplete2_fnAddRef
 186  */
 187 static ULONG WINAPI IAutoComplete2_fnAddRef(
 188         IAutoComplete2 * iface)
 189 {
 190     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 191     ULONG refCount = InterlockedIncrement(&This->ref);
 192
 193     TRACE("(%p)->(%u)\n", This, refCount - 1);
 194
 195     return refCount;
 196 }
 197
 198 /******************************************************************************
 199  * IAutoComplete2_fnRelease
 200  */
 201 static ULONG WINAPI IAutoComplete2_fnRelease(
 202         IAutoComplete2 * iface)
 203 {
 204     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 205     ULONG refCount = InterlockedDecrement(&This->ref);
 206
 207     TRACE("(%p)->(%u)\n", This, refCount + 1);
 208
 209     if (!refCount) {
 210         TRACE("destroying IAutoComplete(%p)\n", This);
 211         HeapFree(GetProcessHeap(), 0, This->quickComplete);
 212         HeapFree(GetProcessHeap(), 0, This->txtbackup);
 213         if (This->enumstr)
 214             IEnumString_Release(This->enumstr);
 215         HeapFree(GetProcessHeap(), 0, This);
 216     }
 217     return refCount;
 218 }
 219
 220 /******************************************************************************
 221  * IAutoComplete2_fnEnable
 222  */
 223 static HRESULT WINAPI IAutoComplete2_fnEnable(
 224     IAutoComplete2 * iface,
 225     BOOL fEnable)
 226 {
 227     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 228
 229     HRESULT hr = S_OK;
 230
 231     TRACE("(%p)->(%s)\n", This, (fEnable)?"true":"false");
 232
 233     This->enabled = fEnable;
 234
 235     return hr;
 236 }
 237
 238 /******************************************************************************
 239  * IAutoComplete2_fnInit
 240  */
 241 static HRESULT WINAPI IAutoComplete2_fnInit(
 242     IAutoComplete2 * iface,
 243     HWND hwndEdit,
 244     IUnknown *punkACL,
 245     LPCOLESTR pwzsRegKeyPath,
 246     LPCOLESTR pwszQuickComplete)
 247 {
 248     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 249
 250     TRACE("(%p)->(%p, %p, %s, %s)\n",
 251           This, hwndEdit, punkACL, debugstr_w(pwzsRegKeyPath), debugstr_w(pwszQuickComplete));
 252
 253     if (This->options & ACO_SEARCH) FIXME(" ACO_SEARCH not supported\n");
 254     if (This->options & ACO_FILTERPREFIXES) FIXME(" ACO_FILTERPREFIXES not supported\n");
 255     if (This->options & ACO_USETAB) FIXME(" ACO_USETAB not supported\n");
 256     if (This->options & ACO_RTLREADING) FIXME(" ACO_RTLREADING not supported\n");
 257
 258     if (!hwndEdit || !punkACL)
 259         return E_INVALIDARG;
 260
 261     if (This->initialized)
 262     {
 263         WARN("Autocompletion object is already initialized\n");
 264         /* This->hwndEdit is set to NULL when the edit window is destroyed. */
 265         return This->hwndEdit ? E_FAIL : E_UNEXPECTED;
 266     }
 267
 268     if (FAILED (IUnknown_QueryInterface (punkACL, &IID_IEnumString, (LPVOID*)&This->enumstr))) {
 269         WARN("No IEnumString interface\n");
 270         return E_NOINTERFACE;
 271     }
 272
 273     This->initialized = TRUE;
 274     This->hwndEdit = hwndEdit;
 275     This->wpOrigEditProc = (WNDPROC) SetWindowLongPtrW( hwndEdit, GWLP_WNDPROC, (LONG_PTR) ACEditSubclassProc);
 276     /* Keep at least one reference to the object until the edit window is destroyed. */
 277     IAutoComplete2_AddRef((IAutoComplete2 *)This);
 278     SetPropW( hwndEdit, autocomplete_propertyW, This );
 279
 280     if (This->options & ACO_AUTOSUGGEST)
 281         create_listbox(This);
 282
 283     if (pwzsRegKeyPath) {
 284         WCHAR *key;
 285         WCHAR result[MAX_PATH];
 286         WCHAR *value;
 287         HKEY hKey = 0;
 288         LONG res;
 289         LONG len;
 290
 291         /* pwszRegKeyPath contains the key as well as the value, so we split */
 292         key = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (lstrlenW(pwzsRegKeyPath)+1)*sizeof(WCHAR));
 293         strcpyW(key, pwzsRegKeyPath);
 294         value = strrchrW(key, '\\');
 295         *value = 0;
 296         value++;
 297         /* Now value contains the value and buffer the key */
 298         res = RegOpenKeyExW(HKEY_CURRENT_USER, key, 0, KEY_READ, &hKey);
 299         if (res != ERROR_SUCCESS) {
 300             /* if the key is not found, MSDN states we must seek in HKEY_LOCAL_MACHINE */
 301             res = RegOpenKeyExW(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hKey);
 302         }
 303         if (res == ERROR_SUCCESS) {
 304             res = RegQueryValueW(hKey, value, result, &len);
 305             if (res == ERROR_SUCCESS) {
 306                 This->quickComplete = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, len*sizeof(WCHAR));
 307                 strcpyW(This->quickComplete, result);
 308             }
 309             RegCloseKey(hKey);
 310         }
 311         HeapFree(GetProcessHeap(), 0, key);
 312     }
 313
 314     if ((pwszQuickComplete) && (!This->quickComplete)) {
 315         This->quickComplete = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (lstrlenW(pwszQuickComplete)+1)*sizeof(WCHAR));
 316         lstrcpyW(This->quickComplete, pwszQuickComplete);
 317     }
 318
 319     return S_OK;
 320 }
 321
 322 /**************************************************************************
 323  *  IAutoComplete2_fnGetOptions
 324  */
 325 static HRESULT WINAPI IAutoComplete2_fnGetOptions(
 326     IAutoComplete2 * iface,
 327     DWORD *pdwFlag)
 328 {
 329     HRESULT hr = S_OK;
 330
 331     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 332
 333     TRACE("(%p) -> (%p)\n", This, pdwFlag);
 334
 335     *pdwFlag = This->options;
 336
 337     return hr;
 338 }
 339
 340 /**************************************************************************
 341  *  IAutoComplete2_fnSetOptions
 342  */
 343 static HRESULT WINAPI IAutoComplete2_fnSetOptions(
 344     IAutoComplete2 * iface,
 345     DWORD dwFlag)
 346 {
 347     HRESULT hr = S_OK;
 348
 349     IAutoCompleteImpl *This = (IAutoCompleteImpl *)iface;
 350
 351     TRACE("(%p) -> (0x%x)\n", This, dwFlag);
 352
 353     This->options = dwFlag;
 354
 355     if ((This->options & ACO_AUTOSUGGEST) && This->hwndEdit && !This->hwndListBox)
 356         create_listbox(This);
 357
 358     return hr;
 359 }
 360
 361 /**************************************************************************
 362  *  IAutoCompleteDropDown_fnGetDropDownStatus
 363  */
 364 static HRESULT WINAPI IAutoCompleteDropDown_fnGetDropDownStatus(
 365     IAutoCompleteDropDown *iface,
 366     DWORD *pdwFlags,
 367     LPWSTR *ppwszString)
 368 {
 369     IAutoCompleteImpl *This = impl_from_IAutoCompleteDropDown(iface);
 370     BOOL dropped;
 371
 372     TRACE("(%p) -> (%p, %p)\n", This, pdwFlags, ppwszString);
 373
 374     dropped = IsWindowVisible(This->hwndListBox);
 375
 376     if (pdwFlags)
 377         *pdwFlags = (dropped ? ACDD_VISIBLE : 0);
 378
 379     if (ppwszString) {
 380         if (dropped) {
 381             int sel;
 382
 383             sel = SendMessageW(This->hwndListBox, LB_GETCURSEL, 0, 0);
 384             if (sel >= 0)
 385             {
 386                 DWORD len;
 387
 388                 len = SendMessageW(This->hwndListBox, LB_GETTEXTLEN, sel, 0);
 389                 *ppwszString = CoTaskMemAlloc((len+1)*sizeof(WCHAR));
 390                 SendMessageW(This->hwndListBox, LB_GETTEXT, sel, (LPARAM)*ppwszString);
 391             }
 392             else
 393                 *ppwszString = NULL;
 394         }
 395         else
 396             *ppwszString = NULL;
 397     }
 398
 399     return S_OK;
 400 }
 401
 402 /**************************************************************************
 403  *  IAutoCompleteDropDown_fnResetEnumarator
 404  */
 405 static HRESULT WINAPI IAutoCompleteDropDown_fnResetEnumerator(
 406     IAutoCompleteDropDown *iface)
 407 {
 408     IAutoCompleteImpl *This = impl_from_IAutoCompleteDropDown(iface);
 409
 410     FIXME("(%p): stub\n", This);
 411
 412     return E_NOTIMPL;
 413 }
 414
 415
 416
 417 /**************************************************************************
 418  *  IAutoComplete2 VTable
 419  */
 420 static const IAutoComplete2Vtbl acvt =
 421 {
 422     IAutoComplete2_fnQueryInterface,
 423     IAutoComplete2_fnAddRef,
 424     IAutoComplete2_fnRelease,
 425     IAutoComplete2_fnInit,
 426     IAutoComplete2_fnEnable,
 427     /* IAutoComplete2 */
 428     IAutoComplete2_fnSetOptions,
 429     IAutoComplete2_fnGetOptions,
 430 };
 431
 432
 433 static HRESULT WINAPI IAutoCompleteDropDown_fnQueryInterface(IAutoCompleteDropDown *iface,
 434             REFIID riid, LPVOID *ppvObj)
 435 {
 436     IAutoCompleteImpl *This = impl_from_IAutoCompleteDropDown(iface);
 437     return IAutoComplete2_fnQueryInterface(_IAutoComplete2_(This), riid, ppvObj);
 438 }
 439
 440 static ULONG WINAPI IAutoCompleteDropDown_fnAddRef(IAutoCompleteDropDown *iface)
 441 {
 442     IAutoCompleteImpl *This = impl_from_IAutoCompleteDropDown(iface);
 443     return IAutoComplete2_fnAddRef(_IAutoComplete2_(This));
 444 }
 445
 446 static ULONG WINAPI IAutoCompleteDropDown_fnRelease(IAutoCompleteDropDown *iface)
 447 {
 448     IAutoCompleteImpl *This = impl_from_IAutoCompleteDropDown(iface);
 449     return IAutoComplete2_fnRelease(_IAutoComplete2_(This));
 450 }
 451
 452 /**************************************************************************
 453  *  IAutoCompleteDropDown VTable
 454  */
 455 static const IAutoCompleteDropDownVtbl acdropdownvt =
 456 {
 457     IAutoCompleteDropDown_fnQueryInterface,
 458     IAutoCompleteDropDown_fnAddRef,
 459     IAutoCompleteDropDown_fnRelease,
 460     IAutoCompleteDropDown_fnGetDropDownStatus,
 461     IAutoCompleteDropDown_fnResetEnumerator,
 462 };
 463
 464 /*
 465   Window procedure for autocompletion
 466  */
 467 static LRESULT APIENTRY ACEditSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 468 {
 469     IAutoCompleteImpl *This = GetPropW(hwnd, autocomplete_propertyW);
 470     LPOLESTR strs;
 471     HRESULT hr;
 472     WCHAR hwndText[255];
 473     WCHAR *hwndQCText;
 474     RECT r;
 475     BOOL control, filled, displayall = FALSE;
 476     int cpt, height, sel;
 477
 478     if (!This->enabled) return CallWindowProcW(This->wpOrigEditProc, hwnd, uMsg, wParam, lParam);
 479
 480     switch (uMsg)
 481     {
 482         case CB_SHOWDROPDOWN:
 483             ShowWindow(This->hwndListBox, SW_HIDE);
 484             break;
 485         case WM_KILLFOCUS:
 486             if ((This->options & ACO_AUTOSUGGEST) &&
 487                 ((HWND)wParam != This->hwndListBox))
 488             {
 489                 ShowWindow(This->hwndListBox, SW_HIDE);
 490             }
 491             return CallWindowProcW(This->wpOrigEditProc, hwnd, uMsg, wParam, lParam);
 492         case WM_KEYUP:
 493             GetWindowTextW( hwnd, hwndText, 255);
 494
 495             switch(wParam) {
 496                 case VK_RETURN:
 497                     /* If quickComplete is set and control is pressed, replace the string */
 498                     control = GetKeyState(VK_CONTROL) & 0x8000;
 499                     if (control && This->quickComplete) {
 500                         hwndQCText = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
 501                                                        (lstrlenW(This->quickComplete)+lstrlenW(hwndText))*sizeof(WCHAR));
 502                         sel = sprintfW(hwndQCText, This->quickComplete, hwndText);
 503                         SendMessageW(hwnd, WM_SETTEXT, 0, (LPARAM)hwndQCText);
 504                         SendMessageW(hwnd, EM_SETSEL, 0, sel);
 505                         HeapFree(GetProcessHeap(), 0, hwndQCText);
 506                     }
 507
 508                     ShowWindow(This->hwndListBox, SW_HIDE);
 509                     return 0;
 510                 case VK_LEFT:
 511                 case VK_RIGHT:
 512                     return 0;
 513                 case VK_UP:
 514                 case VK_DOWN:
 515                     /* Two cases here :
 516                        - if the listbox is not visible, displays it
 517                        with all the entries if the style ACO_UPDOWNKEYDROPSLIST
 518                        is present but does not select anything.
 519                        - if the listbox is visible, change the selection
 520                     */
 521                     if ( (This->options & (ACO_AUTOSUGGEST | ACO_UPDOWNKEYDROPSLIST))
 522                          && (!IsWindowVisible(This->hwndListBox) && (! *hwndText)) )
 523                     {
 524                          /* We must display all the entries */
 525                          displayall = TRUE;
 526                     } else {
 527                         if (IsWindowVisible(This->hwndListBox)) {
 528                             int count;
 529
 530                             count = SendMessageW(This->hwndListBox, LB_GETCOUNT, 0, 0);
 531                             /* Change the selection */
 532                             sel = SendMessageW(This->hwndListBox, LB_GETCURSEL, 0, 0);
 533                             if (wParam == VK_UP)
 534                                 sel = ((sel-1)<0)?count-1:sel-1;
 535                             else
 536                                 sel = ((sel+1)>= count)?-1:sel+1;
 537                             SendMessageW(This->hwndListBox, LB_SETCURSEL, sel, 0);
 538                             if (sel != -1) {
 539                                 WCHAR *msg;
 540                                 int len;
 541
 542                                 len = SendMessageW(This->hwndListBox, LB_GETTEXTLEN, sel, 0);
 543                                 msg = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (len+1)*sizeof(WCHAR));
 544                                 SendMessageW(This->hwndListBox, LB_GETTEXT, sel, (LPARAM)msg);
 545                                 SendMessageW(hwnd, WM_SETTEXT, 0, (LPARAM)msg);
 546                                 SendMessageW(hwnd, EM_SETSEL, lstrlenW(msg), lstrlenW(msg));
 547                                 HeapFree(GetProcessHeap(), 0, msg);
 548                             } else {
 549                                 SendMessageW(hwnd, WM_SETTEXT, 0, (LPARAM)This->txtbackup);
 550                                 SendMessageW(hwnd, EM_SETSEL, lstrlenW(This->txtbackup), lstrlenW(This->txtbackup));
 551                             }
 552                         }
 553                         return 0;
 554                     }
 555                     break;
 556                 case VK_BACK:
 557                 case VK_DELETE:
 558                     if ((! *hwndText) && (This->options & ACO_AUTOSUGGEST)) {
 559                         ShowWindow(This->hwndListBox, SW_HIDE);
 560                         return CallWindowProcW(This->wpOrigEditProc, hwnd, uMsg, wParam, lParam);
 561                     }
 562                     if (This->options & ACO_AUTOAPPEND) {
 563                         DWORD b;
 564                         SendMessageW(hwnd, EM_GETSEL, (WPARAM)&b, 0);
 565                         if (b>1) {
 566                             hwndText[b-1] = '\0';
 567                         } else {
 568                             hwndText[0] = '\0';
 569                             SetWindowTextW(hwnd, hwndText);
 570                         }
 571                     }
 572                     break;
 573                 default:
 574                     ;
 575             }
 576
 577             SendMessageW(This->hwndListBox, LB_RESETCONTENT, 0, 0);
 578
 579             HeapFree(GetProcessHeap(), 0, This->txtbackup);
 580             This->txtbackup = HeapAlloc(GetProcessHeap(),
 581                                                  HEAP_ZERO_MEMORY, (lstrlenW(hwndText)+1)*sizeof(WCHAR));
 582             lstrcpyW(This->txtbackup, hwndText);
 583
 584             /* Returns if there is no text to search and we doesn't want to display all the entries */
 585             if ((!displayall) && (! *hwndText) )
 586                 break;
 587
 588             IEnumString_Reset(This->enumstr);
 589             filled = FALSE;
 590             for(cpt = 0;;) {
 591                 ULONG fetched;
 592                 hr = IEnumString_Next(This->enumstr, 1, &strs, &fetched);
 593                 if (hr != S_OK)
 594                     break;
 595
 596                 if (strstrW(strs, hwndText) == strs) {
 597                     if (!filled && (This->options & ACO_AUTOAPPEND)) {
 598                         SetWindowTextW(hwnd, strs);
 599                         SendMessageW(hwnd, EM_SETSEL, lstrlenW(hwndText), lstrlenW(strs));
 600                         if (!(This->options & ACO_AUTOSUGGEST))
 601                             break;
 602                     }
 603
 604                     if (This->options & ACO_AUTOSUGGEST) {
 605                         SendMessageW(This->hwndListBox, LB_ADDSTRING, 0, (LPARAM)strs);
 606                         cpt++;
 607                     }
 608
 609                     filled = TRUE;
 610                 }
 611             }
 612
 613             if (This->options & ACO_AUTOSUGGEST) {
 614                 if (filled) {
 615                     height = SendMessageW(This->hwndListBox, LB_GETITEMHEIGHT, 0, 0);
 616                     SendMessageW(This->hwndListBox, LB_CARETOFF, 0, 0);
 617                     GetWindowRect(hwnd, &r);
 618                     SetParent(This->hwndListBox, HWND_DESKTOP);
 619                     /* It seems that Windows XP displays 7 lines at most
 620                        and otherwise displays a vertical scroll bar */
 621                     SetWindowPos(This->hwndListBox, HWND_TOP,
 622                                  r.left, r.bottom + 1, r.right - r.left, min(height * 7, height*(cpt+1)),
 623                                  SWP_SHOWWINDOW );
 624                 } else {
 625                     ShowWindow(This->hwndListBox, SW_HIDE);
 626                 }
 627             }
 628
 629             break;
 630         case WM_DESTROY:
 631         {
 632             WNDPROC proc = This->wpOrigEditProc;
 633
 634             RemovePropW(hwnd, autocomplete_propertyW);
 635             SetWindowLongPtrW(hwnd, GWLP_WNDPROC, (LONG_PTR)proc);
 636             This->hwndEdit = NULL;
 637             if (This->hwndListBox)
 638                     DestroyWindow(This->hwndListBox);
 639             IAutoComplete2_Release((IAutoComplete2 *)This);
 640             return CallWindowProcW(proc, hwnd, uMsg, wParam, lParam);
 641         }
 642         default:
 643             return CallWindowProcW(This->wpOrigEditProc, hwnd, uMsg, wParam, lParam);
 644
 645     }
 646
 647     return 0;
 648 }
 649
 650 static LRESULT APIENTRY ACLBoxSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 651 {
 652     IAutoCompleteImpl *This = (IAutoCompleteImpl *)GetWindowLongPtrW(hwnd, GWLP_USERDATA);
 653     WCHAR *msg;
 654     int sel, len;
 655
 656     switch (uMsg) {
 657         case WM_MOUSEMOVE:
 658             sel = SendMessageW(hwnd, LB_ITEMFROMPOINT, 0, lParam);
 659             SendMessageW(hwnd, LB_SETCURSEL, sel, 0);
 660             break;
 661         case WM_LBUTTONDOWN:
 662             sel = SendMessageW(hwnd, LB_GETCURSEL, 0, 0);
 663             if (sel < 0)
 664                 break;
 665             len = SendMessageW(This->hwndListBox, LB_GETTEXTLEN, sel, 0);
 666             msg = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (len+1)*sizeof(WCHAR));
 667             SendMessageW(hwnd, LB_GETTEXT, sel, (LPARAM)msg);
 668             SendMessageW(This->hwndEdit, WM_SETTEXT, 0, (LPARAM)msg);
 669             SendMessageW(This->hwndEdit, EM_SETSEL, 0, lstrlenW(msg));
 670             ShowWindow(hwnd, SW_HIDE);
 671             HeapFree(GetProcessHeap(), 0, msg);
 672             break;
 673         default:
 674             return CallWindowProcW(This->wpOrigLBoxProc, hwnd, uMsg, wParam, lParam);
 675     }
 676     return 0;
 677 }