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     static HANDLE hOle32 = NULL;
  67     if(!hOle32)
  68     {
  69         hOle32 = LoadLibraryA("ole32.dll");
  70         if(hOle32)
  71         {
  72             pOleInitialize=(void*)GetProcAddress(hOle32,"OleInitialize");
  73             pOleUninitialize=(void*)GetProcAddress(hOle32,"OleUninitialize");
  74             pRegisterDragDrop=(void*)GetProcAddress(hOle32,"RegisterDragDrop");
  75             pRevokeDragDrop=(void*)GetProcAddress(hOle32,"RevokeDragDrop");
  76             pDoDragDrop=(void*)GetProcAddress(hOle32,"DoDragDrop");
  77             pReleaseStgMedium=(void*)GetProcAddress(hOle32,"ReleaseStgMedium");
  78             pOleSetClipboard=(void*)GetProcAddress(hOle32,"OleSetClipboard");
  79             pOleGetClipboard=(void*)GetProcAddress(hOle32,"OleGetClipboard");
  80
  81             pOleInitialize(NULL);
  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         UINT i;
  95         int rootsize = 0,size = 0;
  96         char szRootPath[MAX_PATH];
  97         char szFileName[MAX_PATH];
  98         HGLOBAL hGlobal;
  99         DROPFILES *pDropFiles;
 100         int offset;
 101
 102         TRACE("(%p,%p,%u)\n", pidlRoot, apidl, cidl);
 103
 104         /* get the size needed */
 105         size = sizeof(DROPFILES);
 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 = (DROPFILES *)GlobalLock(hGlobal);
 124         pDropFiles->pFiles = sizeof(DROPFILES);
 125         pDropFiles->fWide = FALSE;
 126
 127         offset = pDropFiles->pFiles;
 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         UINT i;
 148         int offset = 0, sizePidl, size;
 149         HGLOBAL hGlobal;
 150         LPIDA   pcida;
 151
 152         TRACE("(%p,%p,%u)\n", pidlRoot, apidl, cidl);
 153
 154         /* get the size needed */
 155         size = sizeof(CIDA) + sizeof (UINT)*(cidl);     /* header */
 156         size += ILGetSize (pidlRoot);                   /* root pidl */
 157         for(i=0; i<cidl; i++)
 158         {
 159           size += ILGetSize(apidl[i]);                  /* child pidls */
 160         }
 161
 162         /* fill the structure */
 163         hGlobal = GlobalAlloc(GHND|GMEM_SHARE, size);
 164         if(!hGlobal) return hGlobal;
 165         pcida = GlobalLock (hGlobal);
 166         pcida->cidl = cidl;
 167
 168         /* root pidl */
 169         offset = sizeof(CIDA) + sizeof (UINT)*(cidl);
 170         pcida->aoffset[0] = offset;                     /* first element */
 171         sizePidl = ILGetSize (pidlRoot);
 172         memcpy(((LPBYTE)pcida)+offset, pidlRoot, sizePidl);
 173         offset += sizePidl;
 174
 175         for(i=0; i<cidl; i++)                           /* child pidls */
 176         {
 177           pcida->aoffset[i+1] = offset;
 178           sizePidl = ILGetSize(apidl[i]);
 179           memcpy(((LPBYTE)pcida)+offset, apidl[i], sizePidl);
 180           offset += sizePidl;
 181         }
 182
 183         GlobalUnlock(hGlobal);
 184         return hGlobal;
 185 }
 186
 187 HGLOBAL RenderSHELLIDLISTOFFSET (LPITEMIDLIST pidlRoot, LPITEMIDLIST * apidl, UINT cidl)
 188 {
 189         FIXME("\n");
 190         return 0;
 191 }
 192
 193 HGLOBAL RenderFILECONTENTS (LPITEMIDLIST pidlRoot, LPITEMIDLIST * apidl, UINT cidl)
 194 {
 195         FIXME("\n");
 196         return 0;
 197 }
 198
 199 HGLOBAL RenderFILEDESCRIPTOR (LPITEMIDLIST pidlRoot, LPITEMIDLIST * apidl, UINT cidl)
 200 {
 201         FIXME("\n");
 202         return 0;
 203 }
 204
 205 HGLOBAL RenderFILENAME (LPITEMIDLIST pidlRoot, LPITEMIDLIST * apidl, UINT cidl)
 206 {
 207         int len, size = 0;
 208         char szTemp[MAX_PATH], *szFileName;
 209         HGLOBAL hGlobal;
 210
 211         TRACE("(%p,%p,%u)\n", pidlRoot, apidl, cidl);
 212
 213         /* build name of first file */
 214         SHGetPathFromIDListA(pidlRoot, szTemp);
 215         PathAddBackslashA(szTemp);
 216         len = strlen(szTemp);
 217         _ILSimpleGetText(apidl[0], szTemp+len, MAX_PATH - len);
 218         size = strlen(szTemp) + 1;
 219
 220         /* fill the structure */
 221         hGlobal = GlobalAlloc(GHND|GMEM_SHARE, size);
 222         if(!hGlobal) return hGlobal;
 223         szFileName = (char *)GlobalLock(hGlobal);
 224         GlobalUnlock(hGlobal);
 225         return hGlobal;
 226 }
 227
 228 HGLOBAL RenderPREFEREDDROPEFFECT (DWORD dwFlags)
 229 {
 230         DWORD * pdwFlag;
 231         HGLOBAL hGlobal;
 232
 233         TRACE("(0x%08lx)\n", dwFlags);
 234
 235         hGlobal = GlobalAlloc(GHND|GMEM_SHARE, sizeof(DWORD));
 236         if(!hGlobal) return hGlobal;
 237         pdwFlag = (DWORD*)GlobalLock(hGlobal);
 238         *pdwFlag = dwFlags;
 239         GlobalUnlock(hGlobal);
 240         return hGlobal;
 241 }
 242
 243 /**************************************************************************
 244  * IsDataInClipboard
 245  *
 246  * checks if there is something in the clipboard we can use
 247  */
 248 BOOL IsDataInClipboard (HWND hwnd)
 249 {
 250         BOOL ret = FALSE;
 251
 252         if (OpenClipboard(hwnd))
 253         {
 254           if (GetOpenClipboardWindow())
 255           {
 256             ret = IsClipboardFormatAvailable(CF_TEXT);
 257           }
 258           CloseClipboard();
 259         }
 260         return ret;
 261 }