dlls/shell32/clipboard.c

   1 /*
   2  *      clipboard helper functions
   3  *
   4  *      Copyright 2000  Juergen Schmied <juergen.schmied@debitel.de>
   5  *
   6  * For copy & paste functions within contextmenus does the shell use
   7  * the OLE clipboard functions in combination with dataobjects.
   8  * The OLE32.DLL gets loaded with LoadLibrary
   9  *
  10  * - a right mousebutton-copy sets the following formats:
  11  *  classic:
  12  *      Shell IDList Array
  13  *      Prefered Drop Effect
  14  *      Shell Object Offsets
  15  *      HDROP
  16  *      FileName
  17  *  ole:
  18  *      OlePrivateData (ClipboardDataObjectInterface)
  19  *
  20  */
  21
  22 #include <string.h>
  23
  24 #include "debugtools.h"
  25
  26 #include "pidl.h"
  27 #include "wine/undocshell.h"
  28 #include "shell32_main.h"
  29
  30 DEFAULT_DEBUG_CHANNEL(shell);
  31
  32 static int refClipCount = 0;
  33 static HINSTANCE hShellOle32 = 0;
  34
  35 /**************************************************************************
  36  * InitShellOle
  37  *
  38  *
  39  */
  40 void InitShellOle(void)
  41 {
  42 }
  43
  44 /**************************************************************************
  45  * FreeShellOle
  46  *
  47  * unload OLE32.DLL
  48  */
  49 void FreeShellOle(void)
  50 {
  51         if (!--refClipCount)
  52         {
  53           pOleUninitialize();
  54           FreeLibrary(hShellOle32);
  55         }
  56 }
  57
  58 /**************************************************************************
  59  * LoadShellOle
  60  *
  61  * make sure OLE32.DLL is loaded
  62  */
  63 BOOL GetShellOle(void)
  64 {
  65         if(!refClipCount)
  66         {
  67           hShellOle32 = LoadLibraryA("ole32.dll");
  68           if(hShellOle32)
  69           {
  70             pOleInitialize=(void*)GetProcAddress(hShellOle32,"OleInitialize");
  71             pOleUninitialize=(void*)GetProcAddress(hShellOle32,"OleUninitialize");
  72             pRegisterDragDrop=(void*)GetProcAddress(hShellOle32,"RegisterDragDrop");
  73             pRevokeDragDrop=(void*)GetProcAddress(hShellOle32,"RevokeDragDrop");
  74             pDoDragDrop=(void*)GetProcAddress(hShellOle32,"DoDragDrop");
  75             pReleaseStgMedium=(void*)GetProcAddress(hShellOle32,"ReleaseStgMedium");
  76             pOleSetClipboard=(void*)GetProcAddress(hShellOle32,"OleSetClipboard");
  77             pOleGetClipboard=(void*)GetProcAddress(hShellOle32,"OleGetClipboard");
  78
  79             pOleInitialize(NULL);
  80             refClipCount++;
  81           }
  82         }
  83         return TRUE;
  84 }
  85
  86 /**************************************************************************
  87  * RenderHDROP
  88  *
  89  * creates a CF_HDROP structure
  90  */
  91 HGLOBAL RenderHDROP(LPITEMIDLIST pidlRoot, LPITEMIDLIST * apidl, UINT cidl)
  92 {
  93         int i;
  94         int rootsize = 0,size = 0;
  95         char szRootPath[MAX_PATH];
  96         char szFileName[MAX_PATH];
  97         HGLOBAL hGlobal;
  98         DROPFILES *pDropFiles;
  99         int offset;
 100
 101         TRACE("(%p,%p,%u)\n", pidlRoot, apidl, cidl);
 102
 103         /* get the size needed */
 104         size = sizeof(DROPFILES);
 105
 106         SHGetPathFromIDListA(pidlRoot, szRootPath);
 107         PathAddBackslashA(szRootPath);
 108         rootsize = strlen(szRootPath);
 109
 110         for (i=0; i<cidl;i++)
 111         {
 112           _ILSimpleGetText(apidl[i], szFileName, MAX_PATH);
 113           size += rootsize + strlen(szFileName) + 1;
 114         }
 115
 116         size++;
 117
 118         /* Fill the structure */
 119         hGlobal = GlobalAlloc(GHND|GMEM_SHARE, size);
 120         if(!hGlobal) return hGlobal;
 121
 122         pDropFiles = (DROPFILES *)GlobalLock(hGlobal);
 123         pDropFiles->pFiles = sizeof(DROPFILES);
 124         pDropFiles->fWide = FALSE;
 125
 126         offset = pDropFiles->pFiles;
 127         strcpy(szFileName, szRootPath);
 128
 129         for (i=0; i<cidl;i++)
 130         {
 131
 132           _ILSimpleGetText(apidl[i], szFileName + rootsize, MAX_PATH - rootsize);
 133           size = strlen(szFileName) + 1;
 134           strcpy(((char*)pDropFiles)+offset, szFileName);
 135           offset += size;
 136         }
 137
 138         ((char*)pDropFiles)[offset] = 0;
 139         GlobalUnlock(hGlobal);
 140
 141         return hGlobal;
 142 }
 143
 144 HGLOBAL RenderSHELLIDLIST (LPITEMIDLIST pidlRoot, LPITEMIDLIST * apidl, UINT cidl)
 145 {
 146         int i,offset = 0, sizePidl, size;
 147         HGLOBAL hGlobal;
 148         LPCIDA  pcida;
 149
 150         TRACE("(%p,%p,%u)\n", pidlRoot, apidl, cidl);
 151
 152         /* get the size needed */
 153         size = sizeof(CIDA) + sizeof (UINT)*(cidl);     /* header */
 154         size += ILGetSize (pidlRoot);                   /* root pidl */
 155         for(i=0; i<cidl; i++)
 156         {
 157           size += ILGetSize(apidl[i]);                  /* child pidls */
 158         }
 159
 160         /* fill the structure */
 161         hGlobal = GlobalAlloc(GHND|GMEM_SHARE, size);
 162         if(!hGlobal) return hGlobal;
 163         pcida = GlobalLock (hGlobal);
 164         pcida->cidl = cidl;
 165
 166         /* root pidl */
 167         offset = sizeof(CIDA) + sizeof (UINT)*(cidl);
 168         pcida->aoffset[0] = offset;                     /* first element */
 169         sizePidl = ILGetSize (pidlRoot);
 170         memcpy(((LPBYTE)pcida)+offset, pidlRoot, sizePidl);
 171         offset += sizePidl;
 172
 173         for(i=0; i<cidl; i++)                           /* child pidls */
 174         {
 175           pcida->aoffset[i+1] = offset;
 176           sizePidl = ILGetSize(apidl[i]);
 177           memcpy(((LPBYTE)pcida)+offset, apidl[i], sizePidl);
 178           offset += sizePidl;
 179         }
 180
 181         GlobalUnlock(hGlobal);
 182         return hGlobal;
 183 }
 184
 185 HGLOBAL RenderSHELLIDLISTOFFSET (LPITEMIDLIST pidlRoot, LPITEMIDLIST * apidl, UINT cidl)
 186 {
 187         FIXME("\n");
 188         return 0;
 189 }
 190
 191 HGLOBAL RenderFILECONTENTS (LPITEMIDLIST pidlRoot, LPITEMIDLIST * apidl, UINT cidl)
 192 {
 193         FIXME("\n");
 194         return 0;
 195 }
 196
 197 HGLOBAL RenderFILEDESCRIPTOR (LPITEMIDLIST pidlRoot, LPITEMIDLIST * apidl, UINT cidl)
 198 {
 199         FIXME("\n");
 200         return 0;
 201 }
 202
 203 HGLOBAL RenderFILENAME (LPITEMIDLIST pidlRoot, LPITEMIDLIST * apidl, UINT cidl)
 204 {
 205         int len, size = 0;
 206         char szTemp[MAX_PATH], *szFileName;
 207         HGLOBAL hGlobal;
 208
 209         TRACE("(%p,%p,%u)\n", pidlRoot, apidl, cidl);
 210
 211         /* build name of first file */
 212         SHGetPathFromIDListA(pidlRoot, szTemp);
 213         PathAddBackslashA(szTemp);
 214         len = strlen(szTemp);
 215         _ILSimpleGetText(apidl[0], szTemp+len, MAX_PATH - len);
 216         size = strlen(szTemp) + 1;
 217
 218         /* fill the structure */
 219         hGlobal = GlobalAlloc(GHND|GMEM_SHARE, size);
 220         if(!hGlobal) return hGlobal;
 221         szFileName = (char *)GlobalLock(hGlobal);
 222         GlobalUnlock(hGlobal);
 223         return hGlobal;
 224 }
 225
 226 HGLOBAL RenderPREFEREDDROPEFFECT (DWORD dwFlags)
 227 {
 228         DWORD * pdwFlag;
 229         HGLOBAL hGlobal;
 230
 231         TRACE("(0x%08lx)\n", dwFlags);
 232
 233         hGlobal = GlobalAlloc(GHND|GMEM_SHARE, sizeof(DWORD));
 234         if(!hGlobal) return hGlobal;
 235         pdwFlag = (DWORD*)GlobalLock(hGlobal);
 236         *pdwFlag = dwFlags;
 237         GlobalUnlock(hGlobal);
 238         return hGlobal;
 239 }
 240
 241 /**************************************************************************
 242  * IsDataInClipboard
 243  *
 244  * checks if there is something in the clipboard we can use
 245  */
 246 BOOL IsDataInClipboard (HWND hwnd)
 247 {
 248         BOOL ret = FALSE;
 249
 250         if (OpenClipboard(hwnd))
 251         {
 252           if (GetOpenClipboardWindow())
 253           {
 254             ret = IsClipboardFormatAvailable(CF_TEXT);
 255           }
 256           CloseClipboard();
 257         }
 258         return ret;
 259 }