| 1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/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 | // For compilers that support precompilation, includes "wx.h". |
| 13 | #include "wx/wxprec.h" |
| 14 | |
| 15 | #ifdef __BORLANDC__ |
| 16 | #pragma hdrstop |
| 17 | #endif |
| 18 | |
| 19 | #if wxUSE_DATAOBJ |
| 20 | |
| 21 | #include "wx/dataobj.h" |
| 22 | |
| 23 | #ifndef WX_PRECOMP |
| 24 | #include "wx/app.h" |
| 25 | #endif |
| 26 | |
| 27 | // ---------------------------------------------------------------------------- |
| 28 | // lists |
| 29 | // ---------------------------------------------------------------------------- |
| 30 | |
| 31 | #include "wx/listimpl.cpp" |
| 32 | |
| 33 | WX_DEFINE_LIST(wxSimpleDataObjectList) |
| 34 | |
| 35 | // ---------------------------------------------------------------------------- |
| 36 | // globals |
| 37 | // ---------------------------------------------------------------------------- |
| 38 | |
| 39 | static wxDataFormat dataFormatInvalid; |
| 40 | WXDLLEXPORT const wxDataFormat& wxFormatInvalid = dataFormatInvalid; |
| 41 | |
| 42 | // ============================================================================ |
| 43 | // implementation |
| 44 | // ============================================================================ |
| 45 | |
| 46 | // ---------------------------------------------------------------------------- |
| 47 | // wxDataObjectBase |
| 48 | // ---------------------------------------------------------------------------- |
| 49 | |
| 50 | wxDataObjectBase::~wxDataObjectBase() |
| 51 | { |
| 52 | } |
| 53 | |
| 54 | bool wxDataObjectBase::IsSupported(const wxDataFormat& format, |
| 55 | Direction dir) const |
| 56 | { |
| 57 | size_t nFormatCount = GetFormatCount( dir ); |
| 58 | if ( nFormatCount == 1 ) |
| 59 | { |
| 60 | return format == GetPreferredFormat( dir ); |
| 61 | } |
| 62 | else |
| 63 | { |
| 64 | wxDataFormat *formats = new wxDataFormat[nFormatCount]; |
| 65 | GetAllFormats( formats, dir ); |
| 66 | |
| 67 | size_t n; |
| 68 | for ( n = 0; n < nFormatCount; n++ ) |
| 69 | { |
| 70 | if ( formats[n] == format ) |
| 71 | break; |
| 72 | } |
| 73 | |
| 74 | delete [] formats; |
| 75 | |
| 76 | // found? |
| 77 | return n < nFormatCount; |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | // ---------------------------------------------------------------------------- |
| 82 | // wxDataObjectComposite |
| 83 | // ---------------------------------------------------------------------------- |
| 84 | |
| 85 | wxDataObjectComposite::wxDataObjectComposite() |
| 86 | { |
| 87 | m_preferred = 0; |
| 88 | m_receivedFormat = wxFormatInvalid; |
| 89 | } |
| 90 | |
| 91 | wxDataObjectComposite::~wxDataObjectComposite() |
| 92 | { |
| 93 | WX_CLEAR_LIST( wxSimpleDataObjectList, m_dataObjects ); |
| 94 | } |
| 95 | |
| 96 | wxDataObjectSimple * |
| 97 | wxDataObjectComposite::GetObject(const wxDataFormat& format) const |
| 98 | { |
| 99 | wxSimpleDataObjectList::compatibility_iterator node = m_dataObjects.GetFirst(); |
| 100 | while ( node ) |
| 101 | { |
| 102 | wxDataObjectSimple *dataObj = node->GetData(); |
| 103 | |
| 104 | if ( dataObj->GetFormat() == format ) |
| 105 | { |
| 106 | return dataObj; |
| 107 | } |
| 108 | |
| 109 | node = node->GetNext(); |
| 110 | } |
| 111 | |
| 112 | return (wxDataObjectSimple *)NULL; |
| 113 | } |
| 114 | |
| 115 | void wxDataObjectComposite::Add(wxDataObjectSimple *dataObject, bool preferred) |
| 116 | { |
| 117 | if ( preferred ) |
| 118 | m_preferred = m_dataObjects.GetCount(); |
| 119 | |
| 120 | m_dataObjects.Append( dataObject ); |
| 121 | } |
| 122 | |
| 123 | wxDataFormat wxDataObjectComposite::GetReceivedFormat() const |
| 124 | { |
| 125 | return m_receivedFormat; |
| 126 | } |
| 127 | |
| 128 | wxDataFormat |
| 129 | wxDataObjectComposite::GetPreferredFormat(Direction WXUNUSED(dir)) const |
| 130 | { |
| 131 | wxSimpleDataObjectList::compatibility_iterator node = m_dataObjects.Item( m_preferred ); |
| 132 | |
| 133 | wxCHECK_MSG( node, wxFormatInvalid, wxT("no preferred format") ); |
| 134 | |
| 135 | wxDataObjectSimple* dataObj = node->GetData(); |
| 136 | |
| 137 | return dataObj->GetFormat(); |
| 138 | } |
| 139 | |
| 140 | #if defined(__WXMSW__) |
| 141 | |
| 142 | size_t wxDataObjectComposite::GetBufferOffset( const wxDataFormat& format ) |
| 143 | { |
| 144 | wxDataObjectSimple *dataObj = GetObject(format); |
| 145 | |
| 146 | wxCHECK_MSG( dataObj, 0, |
| 147 | wxT("unsupported format in wxDataObjectComposite")); |
| 148 | |
| 149 | return dataObj->GetBufferOffset( format ); |
| 150 | } |
| 151 | |
| 152 | |
| 153 | const void* wxDataObjectComposite::GetSizeFromBuffer( const void* buffer, |
| 154 | size_t* size, |
| 155 | const wxDataFormat& format ) |
| 156 | { |
| 157 | wxDataObjectSimple *dataObj = GetObject(format); |
| 158 | |
| 159 | wxCHECK_MSG( dataObj, NULL, |
| 160 | wxT("unsupported format in wxDataObjectComposite")); |
| 161 | |
| 162 | return dataObj->GetSizeFromBuffer( buffer, size, format ); |
| 163 | } |
| 164 | |
| 165 | |
| 166 | void* wxDataObjectComposite::SetSizeInBuffer( void* buffer, size_t size, |
| 167 | const wxDataFormat& format ) |
| 168 | { |
| 169 | wxDataObjectSimple *dataObj = GetObject( format ); |
| 170 | |
| 171 | wxCHECK_MSG( dataObj, NULL, |
| 172 | wxT("unsupported format in wxDataObjectComposite")); |
| 173 | |
| 174 | return dataObj->SetSizeInBuffer( buffer, size, format ); |
| 175 | } |
| 176 | |
| 177 | #endif |
| 178 | |
| 179 | size_t wxDataObjectComposite::GetFormatCount(Direction WXUNUSED(dir)) const |
| 180 | { |
| 181 | // TODO what about the Get/Set only formats? |
| 182 | return m_dataObjects.GetCount(); |
| 183 | } |
| 184 | |
| 185 | void wxDataObjectComposite::GetAllFormats(wxDataFormat *formats, |
| 186 | Direction WXUNUSED(dir)) const |
| 187 | { |
| 188 | size_t n = 0; |
| 189 | wxSimpleDataObjectList::compatibility_iterator node; |
| 190 | for ( node = m_dataObjects.GetFirst(); node; node = node->GetNext() ) |
| 191 | { |
| 192 | // TODO if ( !outputOnlyToo ) && this one counts ... |
| 193 | formats[n++] = node->GetData()->GetFormat(); |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | size_t wxDataObjectComposite::GetDataSize(const wxDataFormat& format) const |
| 198 | { |
| 199 | wxDataObjectSimple *dataObj = GetObject(format); |
| 200 | |
| 201 | wxCHECK_MSG( dataObj, 0, |
| 202 | wxT("unsupported format in wxDataObjectComposite")); |
| 203 | |
| 204 | return dataObj->GetDataSize(); |
| 205 | } |
| 206 | |
| 207 | bool wxDataObjectComposite::GetDataHere(const wxDataFormat& format, |
| 208 | void *buf) const |
| 209 | { |
| 210 | wxDataObjectSimple *dataObj = GetObject( format ); |
| 211 | |
| 212 | wxCHECK_MSG( dataObj, false, |
| 213 | wxT("unsupported format in wxDataObjectComposite")); |
| 214 | |
| 215 | return dataObj->GetDataHere( buf ); |
| 216 | } |
| 217 | |
| 218 | bool wxDataObjectComposite::SetData(const wxDataFormat& format, |
| 219 | size_t len, |
| 220 | const void *buf) |
| 221 | { |
| 222 | wxDataObjectSimple *dataObj = GetObject( format ); |
| 223 | |
| 224 | wxCHECK_MSG( dataObj, false, |
| 225 | wxT("unsupported format in wxDataObjectComposite")); |
| 226 | |
| 227 | m_receivedFormat = format; |
| 228 | return dataObj->SetData( len, buf ); |
| 229 | } |
| 230 | |
| 231 | // ---------------------------------------------------------------------------- |
| 232 | // wxTextDataObject |
| 233 | // ---------------------------------------------------------------------------- |
| 234 | |
| 235 | #ifdef wxNEEDS_UTF8_FOR_TEXT_DATAOBJ |
| 236 | |
| 237 | // FIXME-UTF8: we should be able to merge wchar_t and UTF-8 versions once we |
| 238 | // have a way to get UTF-8 string (and its length) in both builds |
| 239 | // without loss of efficiency (i.e. extra buffer copy/strlen call) |
| 240 | |
| 241 | #if wxUSE_UNICODE_WCHAR |
| 242 | |
| 243 | static inline wxMBConv& GetConv(const wxDataFormat& format) |
| 244 | { |
| 245 | // use UTF8 for wxDF_UNICODETEXT and UCS4 for wxDF_TEXT |
| 246 | return format == wxDF_UNICODETEXT ? wxConvUTF8 : wxConvLibc; |
| 247 | } |
| 248 | |
| 249 | size_t wxTextDataObject::GetDataSize(const wxDataFormat& format) const |
| 250 | { |
| 251 | wxCharBuffer buffer = GetConv(format).cWX2MB( GetText().c_str() ); |
| 252 | |
| 253 | return buffer ? strlen( buffer ) : 0; |
| 254 | } |
| 255 | |
| 256 | bool wxTextDataObject::GetDataHere(const wxDataFormat& format, void *buf) const |
| 257 | { |
| 258 | if ( !buf ) |
| 259 | return false; |
| 260 | |
| 261 | wxCharBuffer buffer = GetConv(format).cWX2MB( GetText().c_str() ); |
| 262 | if ( !buffer ) |
| 263 | return false; |
| 264 | |
| 265 | memcpy( (char*) buf, buffer, GetDataSize(format) ); |
| 266 | // strcpy( (char*) buf, buffer ); |
| 267 | |
| 268 | return true; |
| 269 | } |
| 270 | |
| 271 | bool wxTextDataObject::SetData(const wxDataFormat& format, |
| 272 | size_t WXUNUSED(len), const void *buf) |
| 273 | { |
| 274 | if ( buf == NULL ) |
| 275 | return false; |
| 276 | |
| 277 | wxWCharBuffer buffer = GetConv(format).cMB2WX( (const char*)buf ); |
| 278 | |
| 279 | SetText( buffer ); |
| 280 | |
| 281 | return true; |
| 282 | } |
| 283 | |
| 284 | #else // wxUSE_UNICODE_UTF8 |
| 285 | |
| 286 | size_t wxTextDataObject::GetDataSize(const wxDataFormat& format) const |
| 287 | { |
| 288 | if ( format == wxDF_UNICODETEXT || wxLocaleIsUtf8 ) |
| 289 | { |
| 290 | return m_text.utf8_length(); |
| 291 | } |
| 292 | else // wxDF_TEXT |
| 293 | { |
| 294 | const wxCharBuffer buf(wxConvLocal.cWC2MB(m_text.wc_str())); |
| 295 | return buf ? strlen(buf) : 0; |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | bool wxTextDataObject::GetDataHere(const wxDataFormat& format, void *buf) const |
| 300 | { |
| 301 | if ( !buf ) |
| 302 | return false; |
| 303 | |
| 304 | if ( format == wxDF_UNICODETEXT || wxLocaleIsUtf8 ) |
| 305 | { |
| 306 | memcpy(buf, m_text.utf8_str(), m_text.utf8_length()); |
| 307 | } |
| 308 | else // wxDF_TEXT |
| 309 | { |
| 310 | const wxCharBuffer bufLocal(wxConvLocal.cWC2MB(m_text.wc_str())); |
| 311 | if ( !bufLocal ) |
| 312 | return false; |
| 313 | |
| 314 | memcpy(buf, bufLocal, strlen(bufLocal)); |
| 315 | } |
| 316 | |
| 317 | return true; |
| 318 | } |
| 319 | |
| 320 | bool wxTextDataObject::SetData(const wxDataFormat& format, |
| 321 | size_t len, const void *buf_) |
| 322 | { |
| 323 | const char * const buf = static_cast<const char *>(buf_); |
| 324 | |
| 325 | if ( buf == NULL ) |
| 326 | return false; |
| 327 | |
| 328 | if ( format == wxDF_UNICODETEXT || wxLocaleIsUtf8 ) |
| 329 | { |
| 330 | // normally the data is in UTF-8 so we could use FromUTF8Unchecked() |
| 331 | // but it's not absolutely clear what GTK+ does if the clipboard data |
| 332 | // is not in UTF-8 so do an extra check for tranquility, it shouldn't |
| 333 | // matter much if we lose a bit of performance when pasting from |
| 334 | // clipboard |
| 335 | m_text = wxString::FromUTF8(buf, len); |
| 336 | } |
| 337 | else // wxDF_TEXT, convert from current (non-UTF8) locale |
| 338 | { |
| 339 | m_text = wxConvLocal.cMB2WC(buf, len, NULL); |
| 340 | } |
| 341 | |
| 342 | return true; |
| 343 | } |
| 344 | |
| 345 | #endif // wxUSE_UNICODE_WCHAR/wxUSE_UNICODE_UTF8 |
| 346 | |
| 347 | #elif defined(wxNEEDS_UTF16_FOR_TEXT_DATAOBJ) |
| 348 | |
| 349 | static wxMBConvUTF16 sUTF16Converter; |
| 350 | |
| 351 | static inline wxMBConv& GetConv(const wxDataFormat& format) |
| 352 | { |
| 353 | return |
| 354 | format == wxDF_UNICODETEXT |
| 355 | ? (wxMBConv&) sUTF16Converter |
| 356 | : (wxMBConv&) wxConvLocal; |
| 357 | } |
| 358 | |
| 359 | size_t wxTextDataObject::GetDataSize(const wxDataFormat& format) const |
| 360 | { |
| 361 | size_t len = GetConv(format).WC2MB( NULL, GetText().c_str(), 0 ); |
| 362 | len += (format == wxDF_UNICODETEXT ? 2 : 1); |
| 363 | |
| 364 | return len; |
| 365 | } |
| 366 | |
| 367 | bool wxTextDataObject::GetDataHere(const wxDataFormat& format, void *buf) const |
| 368 | { |
| 369 | if ( buf == NULL ) |
| 370 | return false; |
| 371 | |
| 372 | wxCharBuffer buffer = GetConv(format).cWX2MB( GetText().c_str() ); |
| 373 | |
| 374 | size_t len = GetConv(format).WC2MB( NULL, GetText().c_str(), 0 ); |
| 375 | len += (format == wxDF_UNICODETEXT ? 2 : 1); |
| 376 | |
| 377 | // trailing (uni)char 0 |
| 378 | memcpy( (char*)buf, (const char*)buffer, len ); |
| 379 | |
| 380 | return true; |
| 381 | } |
| 382 | |
| 383 | bool wxTextDataObject::SetData(const wxDataFormat& format, |
| 384 | size_t WXUNUSED(len), const void *buf) |
| 385 | { |
| 386 | if ( buf == NULL ) |
| 387 | return false; |
| 388 | |
| 389 | wxWCharBuffer buffer = GetConv(format).cMB2WX( (const char*)buf ); |
| 390 | |
| 391 | SetText( buffer ); |
| 392 | |
| 393 | return true; |
| 394 | } |
| 395 | |
| 396 | #else // !wxNEEDS_UTF{8,16}_FOR_TEXT_DATAOBJ |
| 397 | |
| 398 | size_t wxTextDataObject::GetDataSize() const |
| 399 | { |
| 400 | return GetTextLength() * sizeof(wxChar); |
| 401 | } |
| 402 | |
| 403 | bool wxTextDataObject::GetDataHere(void *buf) const |
| 404 | { |
| 405 | wxStrcpy( (wxChar*)buf, GetText().c_str() ); |
| 406 | |
| 407 | return true; |
| 408 | } |
| 409 | |
| 410 | bool wxTextDataObject::SetData(size_t WXUNUSED(len), const void *buf) |
| 411 | { |
| 412 | SetText( wxString((const wxChar*)buf) ); |
| 413 | |
| 414 | return true; |
| 415 | } |
| 416 | |
| 417 | #endif // different wxTextDataObject implementations |
| 418 | |
| 419 | // ---------------------------------------------------------------------------- |
| 420 | // wxCustomDataObject |
| 421 | // ---------------------------------------------------------------------------- |
| 422 | |
| 423 | wxCustomDataObject::wxCustomDataObject(const wxDataFormat& format) |
| 424 | : wxDataObjectSimple(format) |
| 425 | { |
| 426 | m_data = NULL; |
| 427 | m_size = 0; |
| 428 | } |
| 429 | |
| 430 | wxCustomDataObject::~wxCustomDataObject() |
| 431 | { |
| 432 | Free(); |
| 433 | } |
| 434 | |
| 435 | void wxCustomDataObject::TakeData(size_t size, void *data) |
| 436 | { |
| 437 | Free(); |
| 438 | |
| 439 | m_size = size; |
| 440 | m_data = data; |
| 441 | } |
| 442 | |
| 443 | void *wxCustomDataObject::Alloc(size_t size) |
| 444 | { |
| 445 | return (void *)new char[size]; |
| 446 | } |
| 447 | |
| 448 | void wxCustomDataObject::Free() |
| 449 | { |
| 450 | delete [] (char*)m_data; |
| 451 | m_size = 0; |
| 452 | m_data = (void*)NULL; |
| 453 | } |
| 454 | |
| 455 | size_t wxCustomDataObject::GetDataSize() const |
| 456 | { |
| 457 | return GetSize(); |
| 458 | } |
| 459 | |
| 460 | bool wxCustomDataObject::GetDataHere(void *buf) const |
| 461 | { |
| 462 | if ( buf == NULL ) |
| 463 | return false; |
| 464 | |
| 465 | void *data = GetData(); |
| 466 | if ( data == NULL ) |
| 467 | return false; |
| 468 | |
| 469 | memcpy( buf, data, GetSize() ); |
| 470 | |
| 471 | return true; |
| 472 | } |
| 473 | |
| 474 | bool wxCustomDataObject::SetData(size_t size, const void *buf) |
| 475 | { |
| 476 | Free(); |
| 477 | |
| 478 | m_data = Alloc(size); |
| 479 | if ( m_data == NULL ) |
| 480 | return false; |
| 481 | |
| 482 | m_size = size; |
| 483 | memcpy( m_data, buf, m_size ); |
| 484 | |
| 485 | return true; |
| 486 | } |
| 487 | |
| 488 | // ============================================================================ |
| 489 | // some common dnd related code |
| 490 | // ============================================================================ |
| 491 | |
| 492 | #if wxUSE_DRAG_AND_DROP |
| 493 | |
| 494 | #include "wx/dnd.h" |
| 495 | |
| 496 | // ---------------------------------------------------------------------------- |
| 497 | // wxTextDropTarget |
| 498 | // ---------------------------------------------------------------------------- |
| 499 | |
| 500 | // NB: we can't use "new" in ctor initializer lists because this provokes an |
| 501 | // internal compiler error with VC++ 5.0 (hey, even gcc compiles this!), |
| 502 | // so use SetDataObject() instead |
| 503 | |
| 504 | wxTextDropTarget::wxTextDropTarget() |
| 505 | { |
| 506 | SetDataObject(new wxTextDataObject); |
| 507 | } |
| 508 | |
| 509 | wxDragResult wxTextDropTarget::OnData(wxCoord x, wxCoord y, wxDragResult def) |
| 510 | { |
| 511 | if ( !GetData() ) |
| 512 | return wxDragNone; |
| 513 | |
| 514 | wxTextDataObject *dobj = (wxTextDataObject *)m_dataObject; |
| 515 | return OnDropText( x, y, dobj->GetText() ) ? def : wxDragNone; |
| 516 | } |
| 517 | |
| 518 | // ---------------------------------------------------------------------------- |
| 519 | // wxFileDropTarget |
| 520 | // ---------------------------------------------------------------------------- |
| 521 | |
| 522 | wxFileDropTarget::wxFileDropTarget() |
| 523 | { |
| 524 | SetDataObject(new wxFileDataObject); |
| 525 | } |
| 526 | |
| 527 | wxDragResult wxFileDropTarget::OnData(wxCoord x, wxCoord y, wxDragResult def) |
| 528 | { |
| 529 | if ( !GetData() ) |
| 530 | return wxDragNone; |
| 531 | |
| 532 | wxFileDataObject *dobj = (wxFileDataObject *)m_dataObject; |
| 533 | return OnDropFiles( x, y, dobj->GetFilenames() ) ? def : wxDragNone; |
| 534 | } |
| 535 | |
| 536 | #endif // wxUSE_DRAG_AND_DROP |
| 537 | |
| 538 | #endif // wxUSE_DATAOBJ |