dlls/shell32/enumidlist.c

   1 /*
   2  *      IEnumIDList
   3  *
   4  *      Copyright 1998  Juergen Schmied <juergen.schmied@metronet.de>
   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 #include <stdarg.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #define COBJMACROS
  26
  27 #include "wine/debug.h"
  28 #include "wine/unicode.h"
  29 #include "windef.h"
  30 #include "winbase.h"
  31 #include "winreg.h"
  32 #include "shlwapi.h"
  33
  34 #include "pidl.h"
  35 #include "enumidlist.h"
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(shell);
  38
  39 typedef struct tagENUMLIST
  40 {
  41         struct tagENUMLIST      *pNext;
  42         LPITEMIDLIST            pidl;
  43
  44 } ENUMLIST, *LPENUMLIST;
  45
  46 typedef struct
  47 {
  48         const IEnumIDListVtbl          *lpVtbl;
  49         LONG                            ref;
  50         LPENUMLIST                      mpFirst;
  51         LPENUMLIST                      mpLast;
  52         LPENUMLIST                      mpCurrent;
  53
  54 } IEnumIDListImpl;
  55
  56 static const IEnumIDListVtbl eidlvt;
  57
  58 /**************************************************************************
  59  *  AddToEnumList()
  60  */
  61 BOOL AddToEnumList(
  62         IEnumIDList * iface,
  63         LPITEMIDLIST pidl)
  64 {
  65         IEnumIDListImpl *This = (IEnumIDListImpl *)iface;
  66
  67         LPENUMLIST  pNew;
  68
  69         TRACE("(%p)->(pidl=%p)\n",This,pidl);
  70
  71     if (!iface || !pidl)
  72         return FALSE;
  73
  74         pNew = SHAlloc(sizeof(ENUMLIST));
  75         if(pNew)
  76         {
  77           /*set the next pointer */
  78           pNew->pNext = NULL;
  79           pNew->pidl = pidl;
  80
  81           /*is This the first item in the list? */
  82           if(!This->mpFirst)
  83           {
  84             This->mpFirst = pNew;
  85             This->mpCurrent = pNew;
  86           }
  87
  88           if(This->mpLast)
  89           {
  90             /*add the new item to the end of the list */
  91             This->mpLast->pNext = pNew;
  92           }
  93
  94           /*update the last item pointer */
  95           This->mpLast = pNew;
  96           TRACE("-- (%p)->(first=%p, last=%p)\n",This,This->mpFirst,This->mpLast);
  97           return TRUE;
  98         }
  99         return FALSE;
 100 }
 101
 102 /**************************************************************************
 103  *  CreateFolderEnumList()
 104  */
 105 BOOL CreateFolderEnumList(
 106         IEnumIDList *list,
 107         LPCWSTR lpszPath,
 108         DWORD dwFlags)
 109 {
 110     LPITEMIDLIST pidl=NULL;
 111     WIN32_FIND_DATAW stffile;
 112     HANDLE hFile;
 113     WCHAR  szPath[MAX_PATH];
 114     BOOL succeeded = TRUE;
 115     static const WCHAR stars[] = { '*','.','*',0 };
 116     static const WCHAR dot[] = { '.',0 };
 117     static const WCHAR dotdot[] = { '.','.',0 };
 118
 119     TRACE("(%p)->(path=%s flags=0x%08x)\n", list, debugstr_w(lpszPath), dwFlags);
 120
 121     if(!lpszPath || !lpszPath[0]) return FALSE;
 122
 123     strcpyW(szPath, lpszPath);
 124     PathAddBackslashW(szPath);
 125     strcatW(szPath,stars);
 126
 127     hFile = FindFirstFileW(szPath,&stffile);
 128     if ( hFile != INVALID_HANDLE_VALUE )
 129     {
 130         BOOL findFinished = FALSE;
 131
 132         do
 133         {
 134             if ( !(stffile.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN)
 135              || (dwFlags & SHCONTF_INCLUDEHIDDEN) )
 136             {
 137                 if ( (stffile.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) &&
 138                  dwFlags & SHCONTF_FOLDERS &&
 139                  strcmpW(stffile.cFileName, dot) && strcmpW(stffile.cFileName, dotdot))
 140                 {
 141                     pidl = _ILCreateFromFindDataW(&stffile);
 142                     succeeded = succeeded && AddToEnumList(list, pidl);
 143                 }
 144                 else if (!(stffile.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
 145                  && dwFlags & SHCONTF_NONFOLDERS)
 146                 {
 147                     pidl = _ILCreateFromFindDataW(&stffile);
 148                     succeeded = succeeded && AddToEnumList(list, pidl);
 149                 }
 150             }
 151             if (succeeded)
 152             {
 153                 if (!FindNextFileW(hFile, &stffile))
 154                 {
 155                     if (GetLastError() == ERROR_NO_MORE_FILES)
 156                         findFinished = TRUE;
 157                     else
 158                         succeeded = FALSE;
 159                 }
 160             }
 161         } while (succeeded && !findFinished);
 162         FindClose(hFile);
 163     }
 164     return succeeded;
 165 }
 166
 167 /**************************************************************************
 168 *   DeleteList()
 169 */
 170 static BOOL DeleteList(
 171         IEnumIDList * iface)
 172 {
 173         IEnumIDListImpl *This = (IEnumIDListImpl *)iface;
 174
 175         LPENUMLIST  pDelete;
 176
 177         TRACE("(%p)->()\n",This);
 178
 179         while(This->mpFirst)
 180         { pDelete = This->mpFirst;
 181           This->mpFirst = pDelete->pNext;
 182           SHFree(pDelete->pidl);
 183           SHFree(pDelete);
 184         }
 185         This->mpFirst = This->mpLast = This->mpCurrent = NULL;
 186         return TRUE;
 187 }
 188
 189 /**************************************************************************
 190  *  IEnumIDList_Folder_Constructor
 191  *
 192  */
 193
 194 IEnumIDList * IEnumIDList_Constructor(void)
 195 {
 196     IEnumIDListImpl *lpeidl = HeapAlloc(GetProcessHeap(),
 197      HEAP_ZERO_MEMORY, sizeof(IEnumIDListImpl));
 198
 199     if (lpeidl)
 200     {
 201         lpeidl->ref = 1;
 202         lpeidl->lpVtbl = &eidlvt;
 203     }
 204     TRACE("-- (%p)->()\n",lpeidl);
 205
 206     return (IEnumIDList*)lpeidl;
 207 }
 208
 209 /**************************************************************************
 210  *  EnumIDList_QueryInterface
 211  */
 212 static HRESULT WINAPI IEnumIDList_fnQueryInterface(
 213         IEnumIDList * iface,
 214         REFIID riid,
 215         LPVOID *ppvObj)
 216 {
 217         IEnumIDListImpl *This = (IEnumIDListImpl *)iface;
 218
 219         TRACE("(%p)->(\n\tIID:\t%s,%p)\n",This,debugstr_guid(riid),ppvObj);
 220
 221         *ppvObj = NULL;
 222
 223         if(IsEqualIID(riid, &IID_IUnknown))          /*IUnknown*/
 224         { *ppvObj = This;
 225         }
 226         else if(IsEqualIID(riid, &IID_IEnumIDList))  /*IEnumIDList*/
 227         {    *ppvObj = (IEnumIDList*)This;
 228         }
 229
 230         if(*ppvObj)
 231         { IEnumIDList_AddRef((IEnumIDList*)*ppvObj);
 232           TRACE("-- Interface: (%p)->(%p)\n",ppvObj,*ppvObj);
 233           return S_OK;
 234         }
 235
 236         TRACE("-- Interface: E_NOINTERFACE\n");
 237         return E_NOINTERFACE;
 238 }
 239
 240 /******************************************************************************
 241  * IEnumIDList_fnAddRef
 242  */
 243 static ULONG WINAPI IEnumIDList_fnAddRef(
 244         IEnumIDList * iface)
 245 {
 246         IEnumIDListImpl *This = (IEnumIDListImpl *)iface;
 247         ULONG refCount = InterlockedIncrement(&This->ref);
 248
 249         TRACE("(%p)->(%u)\n", This, refCount - 1);
 250
 251         return refCount;
 252 }
 253 /******************************************************************************
 254  * IEnumIDList_fnRelease
 255  */
 256 static ULONG WINAPI IEnumIDList_fnRelease(
 257         IEnumIDList * iface)
 258 {
 259         IEnumIDListImpl *This = (IEnumIDListImpl *)iface;
 260         ULONG refCount = InterlockedDecrement(&This->ref);
 261
 262         TRACE("(%p)->(%u)\n", This, refCount + 1);
 263
 264         if (!refCount) {
 265           TRACE(" destroying IEnumIDList(%p)\n",This);
 266           DeleteList((IEnumIDList*)This);
 267           HeapFree(GetProcessHeap(),0,This);
 268         }
 269         return refCount;
 270 }
 271
 272 /**************************************************************************
 273  *  IEnumIDList_fnNext
 274  */
 275
 276 static HRESULT WINAPI IEnumIDList_fnNext(
 277         IEnumIDList * iface,
 278         ULONG celt,
 279         LPITEMIDLIST * rgelt,
 280         ULONG *pceltFetched)
 281 {
 282         IEnumIDListImpl *This = (IEnumIDListImpl *)iface;
 283
 284         ULONG    i;
 285         HRESULT  hr = S_OK;
 286         LPITEMIDLIST  temp;
 287
 288         TRACE("(%p)->(%d,%p, %p)\n",This,celt,rgelt,pceltFetched);
 289
 290 /* It is valid to leave pceltFetched NULL when celt is 1. Some of explorer's
 291  * subsystems actually use it (and so may a third party browser)
 292  */
 293         if(pceltFetched)
 294           *pceltFetched = 0;
 295
 296         *rgelt=0;
 297
 298         if(celt > 1 && !pceltFetched)
 299         { return E_INVALIDARG;
 300         }
 301
 302         if(celt > 0 && !This->mpCurrent)
 303         { return S_FALSE;
 304         }
 305
 306         for(i = 0; i < celt; i++)
 307         { if(!(This->mpCurrent))
 308             break;
 309
 310           temp = ILClone(This->mpCurrent->pidl);
 311           rgelt[i] = temp;
 312           This->mpCurrent = This->mpCurrent->pNext;
 313         }
 314         if(pceltFetched)
 315         {  *pceltFetched = i;
 316         }
 317
 318         return hr;
 319 }
 320
 321 /**************************************************************************
 322 *  IEnumIDList_fnSkip
 323 */
 324 static HRESULT WINAPI IEnumIDList_fnSkip(
 325         IEnumIDList * iface,ULONG celt)
 326 {
 327         IEnumIDListImpl *This = (IEnumIDListImpl *)iface;
 328
 329         DWORD    dwIndex;
 330         HRESULT  hr = S_OK;
 331
 332         TRACE("(%p)->(%u)\n",This,celt);
 333
 334         for(dwIndex = 0; dwIndex < celt; dwIndex++)
 335         { if(!This->mpCurrent)
 336           { hr = S_FALSE;
 337             break;
 338           }
 339           This->mpCurrent = This->mpCurrent->pNext;
 340         }
 341         return hr;
 342 }
 343 /**************************************************************************
 344 *  IEnumIDList_fnReset
 345 */
 346 static HRESULT WINAPI IEnumIDList_fnReset(
 347         IEnumIDList * iface)
 348 {
 349         IEnumIDListImpl *This = (IEnumIDListImpl *)iface;
 350
 351         TRACE("(%p)\n",This);
 352         This->mpCurrent = This->mpFirst;
 353         return S_OK;
 354 }
 355 /**************************************************************************
 356 *  IEnumIDList_fnClone
 357 */
 358 static HRESULT WINAPI IEnumIDList_fnClone(
 359         IEnumIDList * iface,LPENUMIDLIST * ppenum)
 360 {
 361         IEnumIDListImpl *This = (IEnumIDListImpl *)iface;
 362
 363         TRACE("(%p)->() to (%p)->() E_NOTIMPL\n",This,ppenum);
 364         return E_NOTIMPL;
 365 }
 366
 367 /**************************************************************************
 368  *  IEnumIDList_fnVTable
 369  */
 370 static const IEnumIDListVtbl eidlvt =
 371 {
 372         IEnumIDList_fnQueryInterface,
 373         IEnumIDList_fnAddRef,
 374         IEnumIDList_fnRelease,
 375         IEnumIDList_fnNext,
 376         IEnumIDList_fnSkip,
 377         IEnumIDList_fnReset,
 378         IEnumIDList_fnClone,
 379 };