src/msw/clipbrd.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        clipbrd.cpp
   3 // Purpose:     Clipboard functionality
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "clipbrd.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/setup.h"
  25 #endif
  26
  27 #if wxUSE_CLIPBOARD
  28
  29 #ifndef WX_PRECOMP
  30 #include "wx/object.h"
  31 #include "wx/event.h"
  32 #include "wx/app.h"
  33 #include "wx/frame.h"
  34 #include "wx/bitmap.h"
  35 #include "wx/utils.h"
  36 #endif
  37
  38 #if wxUSE_METAFILE
  39 #include "wx/metafile.h"
  40 #endif
  41
  42 #include "wx/clipbrd.h"
  43
  44 #include <windows.h>
  45
  46 HICON myIcon;
  47
  48 #include "wx/msw/private.h"
  49 #include "wx/msw/dib.h"
  50
  51 // wxDataObject is tied to OLE/drag and drop implementation,
  52 // therefore so is wxClipboard :-(
  53 #if wxUSE_DRAG_AND_DROP
  54 #include "wx/dataobj.h"
  55 #endif
  56
  57 #include <string.h>
  58
  59 bool wxClipboardIsOpen = FALSE;
  60
  61 bool wxOpenClipboard(void)
  62 {
  63   if (wxTheApp->GetTopWindow() && !wxClipboardIsOpen)
  64   {
  65     wxClipboardIsOpen = (::OpenClipboard((HWND) wxTheApp->GetTopWindow()->GetHWND()) != 0);
  66     return wxClipboardIsOpen;
  67   }
  68   else return FALSE;
  69 }
  70
  71 bool wxCloseClipboard(void)
  72 {
  73   if (wxClipboardIsOpen)
  74   {
  75     wxClipboardIsOpen = FALSE;
  76   }
  77   return (::CloseClipboard() != 0);
  78 }
  79
  80 bool wxEmptyClipboard(void)
  81 {
  82   return (::EmptyClipboard() != 0);
  83 }
  84
  85 bool wxClipboardOpen(void)
  86 {
  87   return wxClipboardIsOpen;
  88 }
  89
  90 bool wxIsClipboardFormatAvailable(wxDataFormat dataFormat)
  91 {
  92   return (::IsClipboardFormatAvailable(dataFormat) != 0);
  93 }
  94
  95 bool wxSetClipboardData(wxDataFormat dataFormat, wxObject *obj, int width, int height)
  96 {
  97   switch (dataFormat)
  98   {
  99     case wxDF_BITMAP:
 100     {
 101       wxBitmap *wxBM = (wxBitmap *)obj;
 102
 103       HDC hdcMem = CreateCompatibleDC(NULL);
 104       HDC hdcSrc = CreateCompatibleDC(NULL);
 105       HBITMAP old = (HBITMAP) ::SelectObject(hdcSrc, (HBITMAP) wxBM->GetHBITMAP());
 106       HBITMAP hBitmap = CreateCompatibleBitmap(hdcSrc,
 107                                               wxBM->GetWidth(), wxBM->GetHeight());
 108       if (!hBitmap)
 109       {
 110         SelectObject(hdcSrc, old);
 111         DeleteDC(hdcMem);
 112         DeleteDC(hdcSrc);
 113         return FALSE;
 114       }
 115       HBITMAP old1 = (HBITMAP) SelectObject(hdcMem, hBitmap);
 116       BitBlt(hdcMem, 0, 0, wxBM->GetWidth(), wxBM->GetHeight(),
 117              hdcSrc, 0, 0, SRCCOPY);
 118
 119       // Select new bitmap out of memory DC
 120       SelectObject(hdcMem, old1);
 121
 122       // Set the data
 123       bool success = (bool)(::SetClipboardData(CF_BITMAP, hBitmap) != 0);
 124
 125       // Clean up
 126       SelectObject(hdcSrc, old);
 127       DeleteDC(hdcSrc);
 128       DeleteDC(hdcMem);
 129       return success;
 130       break;
 131     }
 132     case wxDF_DIB:
 133     {
 134 #if wxUSE_IMAGE_LOADING_IN_MSW
 135       HBITMAP hBitmap=(HBITMAP) ((wxBitmap *)obj)->GetHBITMAP();
 136       HANDLE hDIB=BitmapToDIB(hBitmap,NULL); // NULL==uses system palette
 137       bool success = (::SetClipboardData(CF_DIB,hDIB) != 0);
 138 #else
 139       bool success=FALSE;
 140 #endif
 141       return success;
 142       break;
 143     }
 144 #if wxUSE_METAFILE
 145     case wxDF_METAFILE:
 146     {
 147       wxMetafile *wxMF = (wxMetafile *)obj;
 148       HANDLE data = GlobalAlloc(GHND, sizeof(METAFILEPICT) + 1);
 149 #ifdef __WINDOWS_386__
 150       METAFILEPICT *mf = (METAFILEPICT *)MK_FP32(GlobalLock(data));
 151 #else
 152       METAFILEPICT *mf = (METAFILEPICT *)GlobalLock(data);
 153 #endif
 154
 155       mf->mm = wxMF->GetWindowsMappingMode();
 156       mf->xExt = width;
 157       mf->yExt = height;
 158       mf->hMF = (HMETAFILE) wxMF->GetHMETAFILE();
 159       GlobalUnlock(data);
 160       wxMF->SetHMETAFILE((WXHANDLE) NULL);
 161
 162       return (SetClipboardData(CF_METAFILEPICT, data) != 0);
 163       break;
 164     }
 165 #endif
 166     case CF_SYLK:
 167     case CF_DIF:
 168     case CF_TIFF:
 169     case CF_PALETTE:
 170     {
 171       return FALSE;
 172       break;
 173     }
 174     case wxDF_OEMTEXT:
 175       dataFormat = wxDF_TEXT;
 176     case wxDF_TEXT:
 177        width = strlen((char *)obj) + 1;
 178        height = 1;
 179     default:
 180     {
 181       char *s = (char *)obj;
 182       DWORD l;
 183
 184       l = (width * height);
 185       HANDLE hGlobalMemory = GlobalAlloc(GHND, l);
 186                 if (!hGlobalMemory)
 187         return FALSE;
 188
 189 #ifdef __WINDOWS_386__
 190       LPSTR lpGlobalMemory = (LPSTR)MK_FP32(GlobalLock(hGlobalMemory));
 191 #else
 192       LPSTR lpGlobalMemory = (LPSTR)GlobalLock(hGlobalMemory);
 193 #endif
 194
 195 #ifdef __WIN32__
 196       memcpy(lpGlobalMemory, s, l);
 197 #elif defined(__WATCOMC__) && defined(__WINDOWS_386__)
 198       memcpy(lpGlobalMemory, s, l);
 199 #else
 200       hmemcpy(lpGlobalMemory, s, l);
 201 #endif
 202
 203       GlobalUnlock(hGlobalMemory);
 204       HANDLE success = SetClipboardData(dataFormat, hGlobalMemory);
 205       return (success != 0);
 206       break;
 207     }
 208   }
 209   return FALSE;
 210 }
 211
 212 wxObject *wxGetClipboardData(wxDataFormat dataFormat, long *len)
 213 {
 214   switch (dataFormat)
 215   {
 216     case wxDF_BITMAP:
 217     {
 218       BITMAP bm;
 219       HBITMAP hBitmap = (HBITMAP) GetClipboardData(CF_BITMAP);
 220       if (!hBitmap)
 221         return NULL;
 222
 223       HDC hdcMem = CreateCompatibleDC(NULL);
 224       HDC hdcSrc = CreateCompatibleDC(NULL);
 225
 226       HBITMAP old = (HBITMAP) ::SelectObject(hdcSrc, hBitmap);
 227       GetObject(hBitmap, sizeof(BITMAP), (LPSTR)&bm);
 228
 229       HBITMAP hNewBitmap = CreateBitmapIndirect(&bm);
 230
 231       if (!hNewBitmap)
 232       {
 233         SelectObject(hdcSrc, old);
 234         DeleteDC(hdcMem);
 235         DeleteDC(hdcSrc);
 236         return NULL;
 237       }
 238
 239       HBITMAP old1 = (HBITMAP) SelectObject(hdcMem, hNewBitmap);
 240       BitBlt(hdcMem, 0, 0, bm.bmWidth, bm.bmHeight,
 241              hdcSrc, 0, 0, SRCCOPY);
 242
 243       // Select new bitmap out of memory DC
 244       SelectObject(hdcMem, old1);
 245
 246       // Clean up
 247       SelectObject(hdcSrc, old);
 248       DeleteDC(hdcSrc);
 249       DeleteDC(hdcMem);
 250
 251       // Create and return a new wxBitmap
 252       wxBitmap *wxBM = new wxBitmap;
 253       wxBM->SetHBITMAP((WXHBITMAP) hNewBitmap);
 254       wxBM->SetWidth(bm.bmWidth);
 255       wxBM->SetHeight(bm.bmHeight);
 256       wxBM->SetDepth(bm.bmPlanes);
 257       wxBM->SetOk(TRUE);
 258       return (wxObject *)wxBM;
 259       break;
 260     }
 261     case wxDF_METAFILE:
 262     case CF_SYLK:
 263     case CF_DIF:
 264     case CF_TIFF:
 265     case CF_PALETTE:
 266     case wxDF_DIB:
 267     {
 268       return FALSE;
 269       break;
 270     }
 271     case wxDF_OEMTEXT:
 272       dataFormat = wxDF_TEXT;
 273          case wxDF_TEXT:
 274     default:
 275     {
 276       HANDLE hGlobalMemory = GetClipboardData(dataFormat);
 277       if (!hGlobalMemory)
 278         return NULL;
 279
 280       int hsize = (int)GlobalSize(hGlobalMemory);
 281       if (len)
 282         *len = hsize;
 283
 284       char *s = new char[hsize];
 285       if (!s)
 286         return NULL;
 287
 288 #ifdef __WINDOWS_386__
 289       LPSTR lpGlobalMemory = (LPSTR)MK_FP32(GlobalLock(hGlobalMemory));
 290 #else
 291       LPSTR lpGlobalMemory = (LPSTR)GlobalLock(hGlobalMemory);
 292 #endif
 293
 294 #ifdef __WIN32__
 295       memcpy(s, lpGlobalMemory, GlobalSize(hGlobalMemory));
 296 #elif __WATCOMC__ && defined(__WINDOWS_386__)
 297       memcpy(s, lpGlobalMemory, GlobalSize(hGlobalMemory));
 298 #else
 299       hmemcpy(s, lpGlobalMemory, GlobalSize(hGlobalMemory));
 300 #endif
 301
 302       GlobalUnlock(hGlobalMemory);
 303
 304       return (wxObject *)s;
 305       break;
 306     }
 307   }
 308   return NULL;
 309 }
 310
 311 wxDataFormat  wxEnumClipboardFormats(wxDataFormat dataFormat)
 312 {
 313   return (wxDataFormat) ::EnumClipboardFormats(dataFormat);
 314 }
 315
 316 int  wxRegisterClipboardFormat(char *formatName)
 317 {
 318   return ::RegisterClipboardFormat(formatName);
 319 }
 320
 321 bool wxGetClipboardFormatName(wxDataFormat dataFormat, char *formatName, int maxCount)
 322 {
 323   return (::GetClipboardFormatName((int) dataFormat, formatName, maxCount) > 0);
 324 }
 325
 326 /*
 327  * wxClipboard
 328  */
 329
 330 //-----------------------------------------------------------------------------
 331 // wxClipboard
 332 //-----------------------------------------------------------------------------
 333
 334 IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
 335
 336 wxClipboard::wxClipboard()
 337 {
 338     m_open = FALSE;
 339 }
 340
 341 wxClipboard::~wxClipboard()
 342 {
 343     Clear();
 344 }
 345
 346 void wxClipboard::Clear()
 347 {
 348 }
 349
 350 bool wxClipboard::Open()
 351 {
 352     wxCHECK_MSG( !m_open, FALSE, "clipboard already open" );
 353
 354     m_open = TRUE;
 355
 356     return wxOpenClipboard();
 357 }
 358
 359 bool wxClipboard::SetData( wxDataObject *data )
 360 {
 361 #if wxUSE_DRAG_AND_DROP
 362     wxCHECK_MSG( data, FALSE, "data is invalid" );
 363     wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
 364
 365     switch (data->GetFormat())
 366     {
 367         case wxDF_TEXT:
 368         case wxDF_OEMTEXT:
 369         {
 370             wxTextDataObject* textDataObject = (wxTextDataObject*) data;
 371             wxString str(textDataObject->GetText());
 372             return wxSetClipboardData(data->GetFormat(), (wxObject*) (const char*) str);
 373             break;
 374         }
 375         case wxDF_BITMAP:
 376         case wxDF_DIB:
 377         {
 378             wxBitmapDataObject* bitmapDataObject = (wxBitmapDataObject*) data;
 379             wxBitmap bitmap(bitmapDataObject->GetBitmap());
 380             return wxSetClipboardData(data->GetFormat(), & bitmap);
 381             break;
 382         }
 383 #if wxUSE_METAFILE
 384         case wxDF_METAFILE:
 385         {
 386             wxMetafileDataObject* metaFileDataObject = (wxMetafileDataObject*) data;
 387             wxMetafile metaFile = metaFileDataObject->GetMetafile();
 388             return wxSetClipboardData(wxDF_METAFILE, & metaFile, metaFileDataObject->GetWidth(), metaFileDataObject->GetHeight());
 389             break;
 390         }
 391 #endif
 392         default:
 393         {
 394             return FALSE;
 395         }
 396     }
 397
 398     return FALSE;
 399 #else
 400     return FALSE;
 401 #endif
 402 }
 403
 404 void wxClipboard::Close()
 405 {
 406     wxCHECK_RET( m_open, "clipboard not open" );
 407
 408     m_open = FALSE;
 409     wxCloseClipboard();
 410 }
 411
 412 bool wxClipboard::IsSupportedFormat( wxDataFormat format, const wxString& WXUNUSED(id) )
 413 {
 414     return wxIsClipboardFormatAvailable(format);
 415 }
 416
 417 bool wxClipboard::GetData( wxDataObject *data )
 418 {
 419     wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
 420
 421 #if wxUSE_DRAG_AND_DROP
 422     switch (data->GetFormat())
 423     {
 424         case wxDF_TEXT:
 425         case wxDF_OEMTEXT:
 426         {
 427             wxTextDataObject* textDataObject = (wxTextDataObject*) data;
 428             char* s = (char*) wxGetClipboardData(data->GetFormat());
 429             if (s)
 430             {
 431                 textDataObject->SetText(s);
 432                 delete[] s;
 433                 return TRUE;
 434             }
 435             else
 436                 return FALSE;
 437             break;
 438         }
 439         case wxDF_BITMAP:
 440         case wxDF_DIB:
 441         {
 442             wxBitmapDataObject* bitmapDataObject = (wxBitmapDataObject*) data;
 443             wxBitmap* bitmap = (wxBitmap*) wxGetClipboardData(data->GetFormat());
 444             if (bitmap)
 445             {
 446                 bitmapDataObject->SetBitmap(* bitmap);
 447                 delete bitmap;
 448                 return TRUE;
 449             }
 450             else
 451                 return FALSE;
 452             break;
 453         }
 454 #if wxUSE_METAFILE
 455         case wxDF_METAFILE:
 456         {
 457             wxMetafileDataObject* metaFileDataObject = (wxMetafileDataObject*) data;
 458             wxMetafile* metaFile = (wxMetafile*) wxGetClipboardData(wxDF_METAFILE);
 459             if (metaFile)
 460             {
 461                 metaFileDataObject->SetMetafile(* metaFile);
 462                 delete metaFile;
 463                 return TRUE;
 464             }
 465             else
 466                 return FALSE;
 467
 468             break;
 469         }
 470 #endif
 471         default:
 472         {
 473             return FALSE;
 474         }
 475     }
 476     return FALSE;
 477 #else
 478     return FALSE;
 479 #endif
 480 }
 481
 482 #endif // wxUSE_CLIPBOARD
 483