dlls/shell32/clipboard.c

   1 /*
   2  *      clipboard helper functions
   3  *
   4  *      Copyright 2000  Juergen Schmied <juergen.schmied@debitel.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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  * NOTES:
  21  *
  22  * For copy & paste functions within contextmenus does the shell use
  23  * the OLE clipboard functions in combination with dataobjects.
  24  * The OLE32.DLL gets loaded with LoadLibrary
  25  *
  26  * - a right mousebutton-copy sets the following formats:
  27  *  classic:
  28  *      Shell IDList Array
  29  *      Prefered Drop Effect
  30  *      Shell Object Offsets
  31  *      HDROP
  32  *      FileName
  33  *  ole:
  34  *      OlePrivateData (ClipboardDataObjectInterface)
  35  *
  36  */
  37
  38 #include <string.h>
  39
  40 #include "winreg.h"
  41 #include "pidl.h"
  42 #include "undocshell.h"
  43 #include "shell32_main.h"
  44 #include "shlwapi.h"
  45
  46 #include "wine/debug.h"
  47
  48 WINE_DEFAULT_DEBUG_CHANNEL(shell);
  49
  50 HRESULT (WINAPI *pOleInitialize)(LPVOID reserved);
  51 void    (WINAPI *pOleUninitialize)(void);
  52 HRESULT (WINAPI *pRegisterDragDrop)(HWND hwnd, IDropTarget* pDropTarget);
  53 HRESULT (WINAPI *pRevokeDragDrop)(HWND hwnd);
  54 HRESULT (WINAPI *pDoDragDrop)(LPDATAOBJECT,LPDROPSOURCE,DWORD,DWORD*);
  55 void    (WINAPI *pReleaseStgMedium)(STGMEDIUM* pmedium);
  56 HRESULT (WINAPI *pOleSetClipboard)(IDataObject* pDataObj);
  57 HRESULT (WINAPI *pOleGetClipboard)(IDataObject** ppDataObj);
  58
  59 /**************************************************************************
  60  * GetShellOle
  61  *
  62  * make sure OLE32.DLL is loaded
  63  */
  64 BOOL GetShellOle(void)
  65 {
  66         if(!hShellOle32)
  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           }
  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         UINT 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         UINT i;
 147         int offset = 0, sizePidl, size;
 148         HGLOBAL hGlobal;
 149         LPIDA   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 }