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