| 1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: common/dobjcmn.cpp |
| 3 | // Purpose: implementation of data object methods common to all platforms |
| 4 | // Author: Vadim Zeitlin, Robert Roebling |
| 5 | // Modified by: |
| 6 | // Created: 19.10.99 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) wxWidgets Team |
| 9 | // Licence: wxWindows licence |
| 10 | /////////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | // ============================================================================ |
| 13 | // declarations |
| 14 | // ============================================================================ |
| 15 | |
| 16 | // ---------------------------------------------------------------------------- |
| 17 | // headers |
| 18 | // ---------------------------------------------------------------------------- |
| 19 | |
| 20 | #include "wx/wxprec.h" |
| 21 | |
| 22 | #ifdef __BORLANDC__ |
| 23 | #pragma hdrstop |
| 24 | #endif |
| 25 | |
| 26 | #if wxUSE_DATAOBJ |
| 27 | |
| 28 | #ifndef WX_PRECOMP |
| 29 | #include "wx/app.h" |
| 30 | #include "wx/debug.h" |
| 31 | #endif // WX_PRECOMP |
| 32 | |
| 33 | #include "wx/dataobj.h" |
| 34 | |
| 35 | // ---------------------------------------------------------------------------- |
| 36 | // lists |
| 37 | // ---------------------------------------------------------------------------- |
| 38 | |
| 39 | #include "wx/listimpl.cpp" |
| 40 | |
| 41 | WX_DEFINE_LIST(wxSimpleDataObjectList) |
| 42 | |
| 43 | // ---------------------------------------------------------------------------- |
| 44 | // globals |
| 45 | // ---------------------------------------------------------------------------- |
| 46 | |
| 47 | static wxDataFormat dataFormatInvalid; |
| 48 | WXDLLEXPORT const wxDataFormat& wxFormatInvalid = dataFormatInvalid; |
| 49 | |
| 50 | // ============================================================================ |
| 51 | // implementation |
| 52 | // ============================================================================ |
| 53 | |
| 54 | // ---------------------------------------------------------------------------- |
| 55 | // wxDataObjectBase |
| 56 | // ---------------------------------------------------------------------------- |
| 57 | |
| 58 | wxDataObjectBase::~wxDataObjectBase() |
| 59 | { |
| 60 | } |
| 61 | |
| 62 | bool wxDataObjectBase::IsSupported(const wxDataFormat& format, |
| 63 | Direction dir) const |
| 64 | { |
| 65 | size_t nFormatCount = GetFormatCount(dir); |
| 66 | if ( nFormatCount == 1 ) |
| 67 | { |
| 68 | return format == GetPreferredFormat(dir); |
| 69 | } |
| 70 | else |
| 71 | { |
| 72 | wxDataFormat *formats = new wxDataFormat[nFormatCount]; |
| 73 | GetAllFormats(formats, dir); |
| 74 | |
| 75 | size_t n; |
| 76 | for ( n = 0; n < nFormatCount; n++ ) |
| 77 | { |
| 78 | if ( formats[n] == format ) |
| 79 | break; |
| 80 | } |
| 81 | |
| 82 | delete [] formats; |
| 83 | |
| 84 | // found? |
| 85 | return n < nFormatCount; |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | // ---------------------------------------------------------------------------- |
| 90 | // wxDataObjectComposite |
| 91 | // ---------------------------------------------------------------------------- |
| 92 | |
| 93 | wxDataObjectComposite::wxDataObjectComposite() |
| 94 | { |
| 95 | m_preferred = 0; |
| 96 | } |
| 97 | |
| 98 | wxDataObjectComposite::~wxDataObjectComposite() |
| 99 | { |
| 100 | WX_CLEAR_LIST(wxSimpleDataObjectList, m_dataObjects); |
| 101 | } |
| 102 | |
| 103 | wxDataObjectSimple * |
| 104 | wxDataObjectComposite::GetObject(const wxDataFormat& format) const |
| 105 | { |
| 106 | wxSimpleDataObjectList::compatibility_iterator node = m_dataObjects.GetFirst(); |
| 107 | while ( node ) |
| 108 | { |
| 109 | wxDataObjectSimple *dataObj = node->GetData(); |
| 110 | |
| 111 | if ( dataObj->GetFormat() == format ) |
| 112 | { |
| 113 | return dataObj; |
| 114 | } |
| 115 | |
| 116 | node = node->GetNext(); |
| 117 | } |
| 118 | |
| 119 | return (wxDataObjectSimple *)NULL; |
| 120 | } |
| 121 | |
| 122 | void wxDataObjectComposite::Add(wxDataObjectSimple *dataObject, bool preferred) |
| 123 | { |
| 124 | if ( preferred ) |
| 125 | m_preferred = m_dataObjects.GetCount(); |
| 126 | |
| 127 | m_dataObjects.Append( dataObject ); |
| 128 | } |
| 129 | |
| 130 | wxDataFormat |
| 131 | wxDataObjectComposite::GetPreferredFormat(Direction WXUNUSED(dir)) const |
| 132 | { |
| 133 | wxSimpleDataObjectList::compatibility_iterator node = m_dataObjects.Item( m_preferred ); |
| 134 | |
| 135 | wxCHECK_MSG( node, wxFormatInvalid, wxT("no preferred format") ); |
| 136 | |
| 137 | wxDataObjectSimple* dataObj = node->GetData(); |
| 138 | |
| 139 | return dataObj->GetFormat(); |
| 140 | } |
| 141 | |
| 142 | #if defined(__WXMSW__) |
| 143 | |
| 144 | size_t wxDataObjectComposite::GetBufferOffset( const wxDataFormat& format ) |
| 145 | { |
| 146 | wxDataObjectSimple *dataObj = GetObject(format); |
| 147 | |
| 148 | wxCHECK_MSG( dataObj, 0, |
| 149 | wxT("unsupported format in wxDataObjectComposite")); |
| 150 | |
| 151 | return dataObj->GetBufferOffset( format ); |
| 152 | } |
| 153 | |
| 154 | |
| 155 | const void* wxDataObjectComposite::GetSizeFromBuffer( const void* buffer, |
| 156 | size_t* size, |
| 157 | const wxDataFormat& format ) |
| 158 | { |
| 159 | wxDataObjectSimple *dataObj = GetObject(format); |
| 160 | |
| 161 | wxCHECK_MSG( dataObj, NULL, |
| 162 | wxT("unsupported format in wxDataObjectComposite")); |
| 163 | |
| 164 | return dataObj->GetSizeFromBuffer( buffer, size, format ); |
| 165 | } |
| 166 | |
| 167 | |
| 168 | void* wxDataObjectComposite::SetSizeInBuffer( void* buffer, size_t size, |
| 169 | const wxDataFormat& format ) |
| 170 | { |
| 171 | wxDataObjectSimple *dataObj = GetObject(format); |
| 172 | |
| 173 | wxCHECK_MSG( dataObj, NULL, |
| 174 | wxT("unsupported format in wxDataObjectComposite")); |
| 175 | |
| 176 | return dataObj->SetSizeInBuffer( buffer, size, format ); |
| 177 | } |
| 178 | |
| 179 | #endif |
| 180 | |
| 181 | size_t wxDataObjectComposite::GetFormatCount(Direction WXUNUSED(dir)) const |
| 182 | { |
| 183 | // TODO what about the Get/Set only formats? |
| 184 | return m_dataObjects.GetCount(); |
| 185 | } |
| 186 | |
| 187 | void wxDataObjectComposite::GetAllFormats(wxDataFormat *formats, |
| 188 | Direction WXUNUSED(dir)) const |
| 189 | { |
| 190 | size_t n = 0; |
| 191 | wxSimpleDataObjectList::compatibility_iterator node; |
| 192 | for ( node = m_dataObjects.GetFirst(); node; node = node->GetNext() ) |
| 193 | { |
| 194 | // TODO if ( !outputOnlyToo ) && this one counts ... |
| 195 | formats[n++] = node->GetData()->GetFormat(); |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | size_t wxDataObjectComposite::GetDataSize(const wxDataFormat& format) const |
| 200 | { |
| 201 | wxDataObjectSimple *dataObj = GetObject(format); |
| 202 | |
| 203 | wxCHECK_MSG( dataObj, 0, |
| 204 | wxT("unsupported format in wxDataObjectComposite")); |
| 205 | |
| 206 | return dataObj->GetDataSize(); |
| 207 | } |
| 208 | |
| 209 | bool wxDataObjectComposite::GetDataHere(const wxDataFormat& format, |
| 210 | void *buf) const |
| 211 | { |
| 212 | wxDataObjectSimple *dataObj = GetObject(format); |
| 213 | |
| 214 | wxCHECK_MSG( dataObj, false, |
| 215 | wxT("unsupported format in wxDataObjectComposite")); |
| 216 | |
| 217 | return dataObj->GetDataHere(buf); |
| 218 | } |
| 219 | |
| 220 | bool wxDataObjectComposite::SetData(const wxDataFormat& format, |
| 221 | size_t len, |
| 222 | const void *buf) |
| 223 | { |
| 224 | wxDataObjectSimple *dataObj = GetObject(format); |
| 225 | |
| 226 | wxCHECK_MSG( dataObj, false, |
| 227 | wxT("unsupported format in wxDataObjectComposite")); |
| 228 | |
| 229 | return dataObj->SetData(len, buf); |
| 230 | } |
| 231 | |
| 232 | // ---------------------------------------------------------------------------- |
| 233 | // wxTextDataObject |
| 234 | // ---------------------------------------------------------------------------- |
| 235 | |
| 236 | #if defined(__WXGTK20__) && wxUSE_UNICODE |
| 237 | |
| 238 | static inline wxMBConv& GetConv(const wxDataFormat& format) |
| 239 | { |
| 240 | // use UTF8 for wxDF_UNICODETEXT and UCS4 for wxDF_TEXT |
| 241 | return format == wxDF_UNICODETEXT ? wxConvUTF8 : wxConvLibc; |
| 242 | } |
| 243 | |
| 244 | size_t wxTextDataObject::GetDataSize(const wxDataFormat& format) const |
| 245 | { |
| 246 | wxCharBuffer buffer = GetConv(format).cWX2MB( GetText().c_str() ); |
| 247 | return buffer ? strlen(buffer) + 1 : 0; |
| 248 | } |
| 249 | |
| 250 | bool wxTextDataObject::GetDataHere(const wxDataFormat& format, void *buf) const |
| 251 | { |
| 252 | wxCharBuffer buffer = GetConv(format).cWX2MB( GetText().c_str() ); |
| 253 | if ( !buffer ) |
| 254 | return false; |
| 255 | |
| 256 | strcpy( (char*) buf, buffer ); |
| 257 | |
| 258 | return true; |
| 259 | } |
| 260 | |
| 261 | bool wxTextDataObject::SetData(const wxDataFormat& format, |
| 262 | size_t WXUNUSED(len), const void *buf) |
| 263 | { |
| 264 | wxWCharBuffer buffer = GetConv(format).cMB2WX((const char *)buf); |
| 265 | if ( !buffer ) |
| 266 | return false; |
| 267 | |
| 268 | SetText(buffer); |
| 269 | |
| 270 | return true; |
| 271 | } |
| 272 | |
| 273 | #elif wxUSE_UNICODE && defined(__WXMAC__) |
| 274 | |
| 275 | static wxMBConvUTF16 sUTF16Converter ; |
| 276 | |
| 277 | static inline wxMBConv& GetConv(const wxDataFormat& format) |
| 278 | { |
| 279 | return format == wxDF_UNICODETEXT ? sUTF16Converter : (wxMBConv&) wxConvLocal; |
| 280 | } |
| 281 | |
| 282 | size_t wxTextDataObject::GetDataSize(const wxDataFormat& format) const |
| 283 | { |
| 284 | size_t len = GetConv(format).WC2MB( NULL , GetText().c_str() , 0 ) |
| 285 | + ( format == wxDF_UNICODETEXT ? 2 : 1 ) ; |
| 286 | return len ; |
| 287 | } |
| 288 | |
| 289 | bool wxTextDataObject::GetDataHere(const wxDataFormat& format, void *buf) const |
| 290 | { |
| 291 | wxCharBuffer buffer = GetConv(format).cWX2MB( GetText().c_str() ); |
| 292 | if ( !buffer ) |
| 293 | return false; |
| 294 | |
| 295 | size_t len = GetConv(format).WC2MB( NULL , GetText().c_str() , 0 ) |
| 296 | + ( format == wxDF_UNICODETEXT ? 2 : 1 ) ; |
| 297 | |
| 298 | memcpy( (char*) buf, (const char*) buffer , len ); // trailing (uni)char 0 |
| 299 | |
| 300 | return true; |
| 301 | } |
| 302 | |
| 303 | bool wxTextDataObject::SetData(const wxDataFormat& format, |
| 304 | size_t WXUNUSED(len), const void *buf) |
| 305 | { |
| 306 | wxWCharBuffer buffer = GetConv(format).cMB2WX((const char *)buf); |
| 307 | if ( !buffer ) |
| 308 | return false; |
| 309 | |
| 310 | SetText(buffer); |
| 311 | |
| 312 | return true; |
| 313 | } |
| 314 | |
| 315 | #else |
| 316 | |
| 317 | size_t wxTextDataObject::GetDataSize() const |
| 318 | { |
| 319 | return GetTextLength() * sizeof(wxChar); |
| 320 | } |
| 321 | |
| 322 | bool wxTextDataObject::GetDataHere(void *buf) const |
| 323 | { |
| 324 | wxStrcpy((wxChar *)buf, GetText().c_str()); |
| 325 | |
| 326 | return true; |
| 327 | } |
| 328 | |
| 329 | bool wxTextDataObject::SetData(size_t WXUNUSED(len), const void *buf) |
| 330 | { |
| 331 | SetText(wxString((const wxChar *)buf)); |
| 332 | |
| 333 | return true; |
| 334 | } |
| 335 | |
| 336 | #endif |
| 337 | |
| 338 | // ---------------------------------------------------------------------------- |
| 339 | // wxFileDataObjectBase |
| 340 | // ---------------------------------------------------------------------------- |
| 341 | |
| 342 | // VZ: I don't need this in MSW finally, so if it is needed in wxGTK, it should |
| 343 | // be moved to gtk/dataobj.cpp |
| 344 | #if 0 |
| 345 | |
| 346 | wxString wxFileDataObjectBase::GetFilenames() const |
| 347 | { |
| 348 | wxString str; |
| 349 | size_t count = m_filenames.GetCount(); |
| 350 | for ( size_t n = 0; n < count; n++ ) |
| 351 | { |
| 352 | str << m_filenames[n] << wxT('\0'); |
| 353 | } |
| 354 | |
| 355 | return str; |
| 356 | } |
| 357 | |
| 358 | void wxFileDataObjectBase::SetFilenames(const wxChar* filenames) |
| 359 | { |
| 360 | m_filenames.Empty(); |
| 361 | |
| 362 | wxString current; |
| 363 | for ( const wxChar *pc = filenames; ; pc++ ) |
| 364 | { |
| 365 | if ( *pc ) |
| 366 | { |
| 367 | current += *pc; |
| 368 | } |
| 369 | else |
| 370 | { |
| 371 | if ( !current ) |
| 372 | { |
| 373 | // 2 consecutive NULs - this is the end of the string |
| 374 | break; |
| 375 | } |
| 376 | |
| 377 | m_filenames.Add(current); |
| 378 | current.Empty(); |
| 379 | } |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | #endif // 0 |
| 384 | |
| 385 | // ---------------------------------------------------------------------------- |
| 386 | // wxCustomDataObject |
| 387 | // ---------------------------------------------------------------------------- |
| 388 | |
| 389 | wxCustomDataObject::wxCustomDataObject(const wxDataFormat& format) |
| 390 | : wxDataObjectSimple(format) |
| 391 | { |
| 392 | m_data = (void *)NULL; |
| 393 | } |
| 394 | |
| 395 | wxCustomDataObject::~wxCustomDataObject() |
| 396 | { |
| 397 | Free(); |
| 398 | } |
| 399 | |
| 400 | void wxCustomDataObject::TakeData(size_t size, void *data) |
| 401 | { |
| 402 | Free(); |
| 403 | |
| 404 | m_size = size; |
| 405 | m_data = data; |
| 406 | } |
| 407 | |
| 408 | void *wxCustomDataObject::Alloc(size_t size) |
| 409 | { |
| 410 | return (void *)new char[size]; |
| 411 | } |
| 412 | |
| 413 | void wxCustomDataObject::Free() |
| 414 | { |
| 415 | delete [] (char *)m_data; |
| 416 | m_size = 0; |
| 417 | m_data = (void *)NULL; |
| 418 | } |
| 419 | |
| 420 | size_t wxCustomDataObject::GetDataSize() const |
| 421 | { |
| 422 | return GetSize(); |
| 423 | } |
| 424 | |
| 425 | bool wxCustomDataObject::GetDataHere(void *buf) const |
| 426 | { |
| 427 | void *data = GetData(); |
| 428 | if ( !data ) |
| 429 | return false; |
| 430 | |
| 431 | memcpy(buf, data, GetSize()); |
| 432 | |
| 433 | return true; |
| 434 | } |
| 435 | |
| 436 | bool wxCustomDataObject::SetData(size_t size, const void *buf) |
| 437 | { |
| 438 | Free(); |
| 439 | |
| 440 | m_data = Alloc(size); |
| 441 | if ( !m_data ) |
| 442 | return false; |
| 443 | |
| 444 | memcpy(m_data, buf, m_size = size); |
| 445 | |
| 446 | return true; |
| 447 | } |
| 448 | |
| 449 | // ============================================================================ |
| 450 | // some common dnd related code |
| 451 | // ============================================================================ |
| 452 | |
| 453 | #if wxUSE_DRAG_AND_DROP |
| 454 | |
| 455 | #include "wx/dnd.h" |
| 456 | |
| 457 | // ---------------------------------------------------------------------------- |
| 458 | // wxTextDropTarget |
| 459 | // ---------------------------------------------------------------------------- |
| 460 | |
| 461 | // NB: we can't use "new" in ctor initializer lists because this provokes an |
| 462 | // internal compiler error with VC++ 5.0 (hey, even gcc compiles this!), |
| 463 | // so use SetDataObject() instead |
| 464 | |
| 465 | wxTextDropTarget::wxTextDropTarget() |
| 466 | { |
| 467 | SetDataObject(new wxTextDataObject); |
| 468 | } |
| 469 | |
| 470 | wxDragResult wxTextDropTarget::OnData(wxCoord x, wxCoord y, wxDragResult def) |
| 471 | { |
| 472 | if ( !GetData() ) |
| 473 | return wxDragNone; |
| 474 | |
| 475 | wxTextDataObject *dobj = (wxTextDataObject *)m_dataObject; |
| 476 | return OnDropText(x, y, dobj->GetText()) ? def : wxDragNone; |
| 477 | } |
| 478 | |
| 479 | // ---------------------------------------------------------------------------- |
| 480 | // wxFileDropTarget |
| 481 | // ---------------------------------------------------------------------------- |
| 482 | |
| 483 | wxFileDropTarget::wxFileDropTarget() |
| 484 | { |
| 485 | SetDataObject(new wxFileDataObject); |
| 486 | } |
| 487 | |
| 488 | wxDragResult wxFileDropTarget::OnData(wxCoord x, wxCoord y, wxDragResult def) |
| 489 | { |
| 490 | if ( !GetData() ) |
| 491 | return wxDragNone; |
| 492 | |
| 493 | wxFileDataObject *dobj = (wxFileDataObject *)m_dataObject; |
| 494 | return OnDropFiles(x, y, dobj->GetFilenames()) ? def : wxDragNone; |
| 495 | } |
| 496 | |
| 497 | #endif // wxUSE_DRAG_AND_DROP |
| 498 | |
| 499 | #endif // wxUSE_DATAOBJ |