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 #include "shell.h" /* DROPFILESTRUCT */
  30
  31 DEFAULT_DEBUG_CHANNEL(shell)
  32
  33 static int refClipCount = 0;
  34 static HINSTANCE hShellOle32 = 0;
  35
  36 /**************************************************************************
  37  * InitShellOle
  38  *
  39  *
  40  */
  41 void InitShellOle(void)
  42 {
  43 }
  44
  45 /**************************************************************************
  46  * FreeShellOle
  47  *
  48  * unload OLE32.DLL
  49  */
  50 void FreeShellOle(void)
  51 {
  52         if (!--refClipCount)
  53         {
  54           pOleUninitialize();
  55           FreeLibrary(hShellOle32);
  56         }
  57 }
  58
  59 /**************************************************************************
  60  * LoadShellOle
  61  *
  62  * make sure OLE32.DLL is loaded
  63  */
  64 BOOL GetShellOle(void)
  65 {
  66         if(!refClipCount)
  67         {
  68           hShellOle32 = LoadLibraryA("ole32.dll");
  69           if(hShellOle32)
  70           {
  71             pOleInitialize=(void*)GetProcAddress(hShellOle32,"OleInitialize");
  72             pOleUninitialize=(void*)GetProcAddress(hShellOle32,"OleUninitialize");
  73             pRegisterDragDrop=(void*)GetProcAddress(hShellOle32,"RegisterDragDrop");
  74             pRevokeDragDrop=(void*)GetProcAddress(hShellOle32,"RevokeDragDrop");
  75             pDoDragDrop=(void*)GetProcAddress(hShellOle32,"DoDragDrop");
  76             pReleaseStgMedium=(void*)GetProcAddress(hShellOle32,"ReleaseStgMedium");
  77             pOleSetClipboard=(void*)GetProcAddress(hShellOle32,"OleSetClipboard");
  78             pOleGetClipboard=(void*)GetProcAddress(hShellOle32,"OleGetClipboard");
  79
  80             pOleInitialize(NULL);
  81             refClipCount++;
  82           }
  83         }
  84         return TRUE;
  85 }
  86
  87 /**************************************************************************
  88  * RenderHDROP
  89  *
  90  * creates a CF_HDROP structure
  91  */
  92 HGLOBAL RenderHDROP(LPITEMIDLIST pidlRoot, LPITEMIDLIST * apidl, UINT cidl)
  93 {
  94         int i;
  95         int rootsize = 0,size = 0;
  96         char szRootPath[MAX_PATH];
  97         char szFileName[MAX_PATH];
  98         HGLOBAL hGlobal;
  99         LPDROPFILESTRUCT pDropFiles;
 100         int offset;
 101
 102         TRACE("(%p,%p,%u)\n", pidlRoot, apidl, cidl);
 103
 104         /* get the size needed */
 105         size = sizeof(DROPFILESTRUCT);
 106
 107         SHGetPathFromIDListA(pidlRoot, szRootPath);
 108         PathAddBackslashA(szRootPath);
 109         rootsize = strlen(szRootPath);
 110
 111         for (i=0; i<cidl;i++)
 112         {
 113           _ILSimpleGetText(apidl[i], szFileName, MAX_PATH);
 114           size += rootsize + strlen(szFileName) + 1;
 115         }
 116
 117         size++;
 118
 119         /* Fill the structure */
 120         hGlobal = GlobalAlloc(GHND|GMEM_SHARE, size);
 121         if(!hGlobal) return hGlobal;
 122
 123         pDropFiles = (LPDROPFILESTRUCT)GlobalLock(hGlobal);
 124         pDropFiles->lSize = sizeof(DROPFILESTRUCT);
 125         pDropFiles->fWideChar = FALSE;
 126
 127         offset = pDropFiles->lSize;
 128         strcpy(szFileName, szRootPath);
 129
 130         for (i=0; i<cidl;i++)
 131         {
 132
 133           _ILSimpleGetText(apidl[i], szFileName + rootsize, MAX_PATH - rootsize);
 134           size = strlen(szFileName) + 1;
 135           strcpy(((char*)pDropFiles)+offset, szFileName);
 136           offset += size;
 137         }
 138
 139         ((char*)pDropFiles)[offset] = 0;
 140         GlobalUnlock(hGlobal);
 141
 142         return hGlobal;
 143 }
 144
 145 HGLOBAL RenderSHELLIDLIST (LPITEMIDLIST pidlRoot, LPITEMIDLIST * apidl, UINT cidl)
 146 {
 147         int i,offset = 0, sizePidl, size;
 148         HGLOBAL hGlobal;
 149         LPCIDA  pcida;
 150
 151         TRACE("(%p,%p,%u)\n", pidlRoot, apidl, cidl);
 152
 153         /* get the size needed */
 154         size = sizeof(CIDA) + sizeof (UINT)*(cidl);     /* header */
 155         size += ILGetSize (pidlRoot);                   /* root pidl */
 156         for(i=0; i<cidl; i++)
 157         {
 158           size += ILGetSize(apidl[i]);                  /* child pidls */
 159         }
 160
 161         /* fill the structure */
 162         hGlobal = GlobalAlloc(GHND|GMEM_SHARE, size);
 163         if(!hGlobal) return hGlobal;
 164         pcida = GlobalLock (hGlobal);
 165         pcida->cidl = cidl;
 166
 167         /* root pidl */
 168         offset = sizeof(CIDA) + sizeof (UINT)*(cidl);
 169         pcida->aoffset[0] = offset;                     /* first element */
 170         sizePidl = ILGetSize (pidlRoot);
 171         memcpy(((LPBYTE)pcida)+offset, pidlRoot, sizePidl);
 172         offset += sizePidl;
 173
 174         for(i=0; i<cidl; i++)                           /* child pidls */
 175         {
 176           pcida->aoffset[i+1] = offset;
 177           sizePidl = ILGetSize(apidl[i]);
 178           memcpy(((LPBYTE)pcida)+offset, apidl[i], sizePidl);
 179           offset += sizePidl;
 180         }
 181
 182         GlobalUnlock(hGlobal);
 183         return hGlobal;
 184 }
 185
 186 HGLOBAL RenderSHELLIDLISTOFFSET (LPITEMIDLIST pidlRoot, LPITEMIDLIST * apidl, UINT cidl)
 187 {
 188         FIXME("\n");
 189         return 0;
 190 }
 191
 192 HGLOBAL RenderFILECONTENTS (LPITEMIDLIST pidlRoot, LPITEMIDLIST * apidl, UINT cidl)
 193 {
 194         FIXME("\n");
 195         return 0;
 196 }
 197
 198 HGLOBAL RenderFILEDESCRIPTOR (LPITEMIDLIST pidlRoot, LPITEMIDLIST * apidl, UINT cidl)
 199 {
 200         FIXME("\n");
 201         return 0;
 202 }
 203
 204 HGLOBAL RenderFILENAME (LPITEMIDLIST pidlRoot, LPITEMIDLIST * apidl, UINT cidl)
 205 {
 206         int len, size = 0;
 207         char szTemp[MAX_PATH], *szFileName;
 208         HGLOBAL hGlobal;
 209
 210         TRACE("(%p,%p,%u)\n", pidlRoot, apidl, cidl);
 211
 212         /* build name of first file */
 213         SHGetPathFromIDListA(pidlRoot, szTemp);
 214         PathAddBackslashA(szTemp);
 215         len = strlen(szTemp);
 216         _ILSimpleGetText(apidl[0], szTemp+len, MAX_PATH - len);
 217         size = strlen(szTemp) + 1;
 218
 219         /* fill the structure */
 220         hGlobal = GlobalAlloc(GHND|GMEM_SHARE, size);
 221         if(!hGlobal) return hGlobal;
 222         szFileName = (char *)GlobalLock(hGlobal);
 223         GlobalUnlock(hGlobal);
 224         return hGlobal;
 225 }
 226
 227 HGLOBAL RenderPREFEREDDROPEFFECT (DWORD dwFlags)
 228 {
 229         DWORD * pdwFlag;
 230         HGLOBAL hGlobal;
 231
 232         TRACE("(0x%08lx)\n", dwFlags);
 233
 234         hGlobal = GlobalAlloc(GHND|GMEM_SHARE, sizeof(DWORD));
 235         if(!hGlobal) return hGlobal;
 236         pdwFlag = (DWORD*)GlobalLock(hGlobal);
 237         *pdwFlag = dwFlags;
 238         GlobalUnlock(hGlobal);
 239         return hGlobal;
 240 }
 241
 242 /**************************************************************************
 243  * IsDataInClipboard
 244  *
 245  * checks if there is something in the clipboard we can use
 246  */
 247 BOOL IsDataInClipboard (HWND hwnd)
 248 {
 249         BOOL ret = FALSE;
 250
 251         if (OpenClipboard(hwnd))
 252         {
 253           if (GetOpenClipboardWindow())
 254           {
 255             ret = IsClipboardFormatAvailable(CF_TEXT);
 256           }
 257           CloseClipboard();
 258         }
 259         return ret;
 260 }