| 1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: dataobj.cpp |
| 3 | // Purpose: wxDataObject class |
| 4 | // Author: Robert Roebling |
| 5 | // Id: $Id$ |
| 6 | // Copyright: (c) 1998 Robert Roebling |
| 7 | // Licence: wxWindows licence |
| 8 | /////////////////////////////////////////////////////////////////////////////// |
| 9 | |
| 10 | #ifdef __GNUG__ |
| 11 | #pragma implementation "dataobj.h" |
| 12 | #endif |
| 13 | |
| 14 | #include "wx/dataobj.h" |
| 15 | #include "wx/app.h" |
| 16 | #include "wx/debug.h" |
| 17 | #include "wx/mstream.h" |
| 18 | #include "wx/image.h" |
| 19 | |
| 20 | #include <gdk/gdk.h> |
| 21 | |
| 22 | //------------------------------------------------------------------------- |
| 23 | // global data |
| 24 | //------------------------------------------------------------------------- |
| 25 | |
| 26 | GdkAtom g_textAtom = 0; |
| 27 | GdkAtom g_pngAtom = 0; |
| 28 | GdkAtom g_fileAtom = 0; |
| 29 | |
| 30 | //------------------------------------------------------------------------- |
| 31 | // wxDataFormat |
| 32 | //------------------------------------------------------------------------- |
| 33 | |
| 34 | wxDataFormat::wxDataFormat() |
| 35 | { |
| 36 | // do *not* call PrepareFormats() from here for 2 reasons: |
| 37 | // |
| 38 | // 1. we will have time to do it later because some other Set function |
| 39 | // must be called before we really need them |
| 40 | // |
| 41 | // 2. doing so prevents us from declaring global wxDataFormats because |
| 42 | // calling PrepareFormats (and thus gdk_atom_intern) before GDK is |
| 43 | // initialised will result in a crash |
| 44 | m_type = wxDF_INVALID; |
| 45 | m_format = (GdkAtom) 0; |
| 46 | } |
| 47 | |
| 48 | wxDataFormat::wxDataFormat( wxDataFormatId type ) |
| 49 | { |
| 50 | PrepareFormats(); |
| 51 | SetType( type ); |
| 52 | } |
| 53 | |
| 54 | wxDataFormat::wxDataFormat( const wxChar *id ) |
| 55 | { |
| 56 | PrepareFormats(); |
| 57 | SetId( id ); |
| 58 | } |
| 59 | |
| 60 | wxDataFormat::wxDataFormat( const wxString &id ) |
| 61 | { |
| 62 | PrepareFormats(); |
| 63 | SetId( id ); |
| 64 | } |
| 65 | |
| 66 | wxDataFormat::wxDataFormat( NativeFormat format ) |
| 67 | { |
| 68 | PrepareFormats(); |
| 69 | SetId( format ); |
| 70 | } |
| 71 | |
| 72 | void wxDataFormat::SetType( wxDataFormatId type ) |
| 73 | { |
| 74 | PrepareFormats(); |
| 75 | m_type = type; |
| 76 | |
| 77 | if (m_type == wxDF_TEXT) |
| 78 | m_format = g_textAtom; |
| 79 | else |
| 80 | if (m_type == wxDF_BITMAP) |
| 81 | m_format = g_pngAtom; |
| 82 | else |
| 83 | if (m_type == wxDF_FILENAME) |
| 84 | m_format = g_fileAtom; |
| 85 | else |
| 86 | { |
| 87 | wxFAIL_MSG( wxT("invalid dataformat") ); |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | wxDataFormatId wxDataFormat::GetType() const |
| 92 | { |
| 93 | return m_type; |
| 94 | } |
| 95 | |
| 96 | wxString wxDataFormat::GetId() const |
| 97 | { |
| 98 | wxString ret( gdk_atom_name( m_format ) ); // this will convert from ascii to Unicode |
| 99 | return ret; |
| 100 | } |
| 101 | |
| 102 | void wxDataFormat::SetId( NativeFormat format ) |
| 103 | { |
| 104 | PrepareFormats(); |
| 105 | m_format = format; |
| 106 | |
| 107 | if (m_format == g_textAtom) |
| 108 | m_type = wxDF_TEXT; |
| 109 | else |
| 110 | if (m_format == g_pngAtom) |
| 111 | m_type = wxDF_BITMAP; |
| 112 | else |
| 113 | if (m_format == g_fileAtom) |
| 114 | m_type = wxDF_FILENAME; |
| 115 | else |
| 116 | m_type = wxDF_PRIVATE; |
| 117 | } |
| 118 | |
| 119 | void wxDataFormat::SetId( const wxChar *id ) |
| 120 | { |
| 121 | PrepareFormats(); |
| 122 | m_type = wxDF_PRIVATE; |
| 123 | wxString tmp( id ); |
| 124 | m_format = gdk_atom_intern( wxMBSTRINGCAST tmp.mbc_str(), FALSE ); // what is the string cast for? |
| 125 | } |
| 126 | |
| 127 | void wxDataFormat::PrepareFormats() |
| 128 | { |
| 129 | // VZ: GNOME included in RedHat 6.1 uses the MIME types below and not the |
| 130 | // atoms STRING and file:ALL as the old code was, but normal X apps |
| 131 | // use STRING for text selection when transfering the data via |
| 132 | // clipboard, for example, so do use STRING for now (GNOME apps will |
| 133 | // probably support STRING as well for compatibility anyhow), but use |
| 134 | // text/uri-list for file dnd because compatibility is not important |
| 135 | // here (with whom?) |
| 136 | if (!g_textAtom) |
| 137 | g_textAtom = gdk_atom_intern( "STRING" /* "text/plain" */, FALSE ); |
| 138 | if (!g_pngAtom) |
| 139 | g_pngAtom = gdk_atom_intern( "image/png", FALSE ); |
| 140 | if (!g_fileAtom) |
| 141 | g_fileAtom = gdk_atom_intern( "text/uri-list", FALSE ); |
| 142 | } |
| 143 | |
| 144 | //------------------------------------------------------------------------- |
| 145 | // wxDataObject |
| 146 | //------------------------------------------------------------------------- |
| 147 | |
| 148 | wxDataObject::wxDataObject() |
| 149 | { |
| 150 | } |
| 151 | |
| 152 | bool wxDataObject::IsSupportedFormat(const wxDataFormat& format, Direction dir) const |
| 153 | { |
| 154 | size_t nFormatCount = GetFormatCount(dir); |
| 155 | if ( nFormatCount == 1 ) |
| 156 | { |
| 157 | return format == GetPreferredFormat(); |
| 158 | } |
| 159 | else |
| 160 | { |
| 161 | wxDataFormat *formats = new wxDataFormat[nFormatCount]; |
| 162 | GetAllFormats(formats,dir); |
| 163 | |
| 164 | size_t n; |
| 165 | for ( n = 0; n < nFormatCount; n++ ) |
| 166 | { |
| 167 | if ( formats[n] == format ) |
| 168 | break; |
| 169 | } |
| 170 | |
| 171 | delete [] formats; |
| 172 | |
| 173 | // found? |
| 174 | return n < nFormatCount; |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | // ---------------------------------------------------------------------------- |
| 179 | // wxFileDataObject |
| 180 | // ---------------------------------------------------------------------------- |
| 181 | |
| 182 | bool wxFileDataObject::GetDataHere(void *buf) const |
| 183 | { |
| 184 | wxString filenames; |
| 185 | |
| 186 | for (size_t i = 0; i < m_filenames.GetCount(); i++) |
| 187 | { |
| 188 | filenames += m_filenames[i]; |
| 189 | filenames += (wxChar) 0; |
| 190 | } |
| 191 | |
| 192 | memcpy( buf, filenames.mbc_str(), filenames.Len() + 1 ); |
| 193 | |
| 194 | return TRUE; |
| 195 | } |
| 196 | |
| 197 | size_t wxFileDataObject::GetDataSize() const |
| 198 | { |
| 199 | size_t res = 0; |
| 200 | |
| 201 | for (size_t i = 0; i < m_filenames.GetCount(); i++) |
| 202 | { |
| 203 | res += m_filenames[i].Len(); |
| 204 | res += 1; |
| 205 | } |
| 206 | |
| 207 | return res + 1; |
| 208 | } |
| 209 | |
| 210 | bool wxFileDataObject::SetData(size_t WXUNUSED(size), const void *buf) |
| 211 | { |
| 212 | // VZ: old format |
| 213 | #if 0 |
| 214 | // filenames are stores as a string with #0 as deliminators |
| 215 | const char *filenames = (const char*) buf; |
| 216 | size_t pos = 0; |
| 217 | for(;;) |
| 218 | { |
| 219 | if (filenames[0] == 0) |
| 220 | break; |
| 221 | if (pos >= size) |
| 222 | break; |
| 223 | wxString file( filenames ); // this returns the first file |
| 224 | AddFile( file ); |
| 225 | pos += file.Len()+1; |
| 226 | filenames += file.Len()+1; |
| 227 | } |
| 228 | #else // 1 |
| 229 | m_filenames.Empty(); |
| 230 | |
| 231 | // the text/uri-list format is a sequence of URIs (filenames prefixed by |
| 232 | // "file:" as far as I see) delimited by "\r\n" of total length size |
| 233 | // (I wonder what happens if the file has '\n' in its filename??) |
| 234 | wxString filename; |
| 235 | for ( const char *p = (const char *)buf; ; p++ ) |
| 236 | { |
| 237 | // some broken programs (testdnd GTK+ sample!) omit the trailing |
| 238 | // "\r\n", so check for '\0' explicitly here instead of doing it in |
| 239 | // the loop statement to account for it |
| 240 | if ( (*p == '\r' && *(p+1) == '\n') || !*p ) |
| 241 | { |
| 242 | size_t lenPrefix = 5; // strlen("file:") |
| 243 | if ( filename.Left(lenPrefix).MakeLower() == _T("file:") ) |
| 244 | { |
| 245 | // sometimes the syntax is "file:filename", sometimes it's |
| 246 | // URL-like: "file://filename" - deal with both |
| 247 | if ( filename[lenPrefix] == _T('/') && |
| 248 | filename[lenPrefix + 1] == _T('/') ) |
| 249 | { |
| 250 | // skip the slashes |
| 251 | lenPrefix += 2; |
| 252 | } |
| 253 | |
| 254 | AddFile(filename.c_str() + lenPrefix); |
| 255 | filename.Empty(); |
| 256 | } |
| 257 | else |
| 258 | { |
| 259 | wxLogDebug(_T("Unsupported URI '%s' in wxFileDataObject"), |
| 260 | filename.c_str()); |
| 261 | } |
| 262 | |
| 263 | if ( !*p ) |
| 264 | break; |
| 265 | |
| 266 | // skip '\r' |
| 267 | p++; |
| 268 | } |
| 269 | else |
| 270 | { |
| 271 | filename += *p; |
| 272 | } |
| 273 | } |
| 274 | #endif // 0/1 |
| 275 | |
| 276 | return TRUE; |
| 277 | } |
| 278 | |
| 279 | void wxFileDataObject::AddFile( const wxString &filename ) |
| 280 | { |
| 281 | m_filenames.Add( filename ); |
| 282 | } |
| 283 | |
| 284 | // ---------------------------------------------------------------------------- |
| 285 | // wxBitmapDataObject |
| 286 | // ---------------------------------------------------------------------------- |
| 287 | |
| 288 | wxBitmapDataObject::wxBitmapDataObject() |
| 289 | { |
| 290 | Init(); |
| 291 | } |
| 292 | |
| 293 | wxBitmapDataObject::wxBitmapDataObject( const wxBitmap& bitmap ) |
| 294 | : wxBitmapDataObjectBase(bitmap) |
| 295 | { |
| 296 | Init(); |
| 297 | |
| 298 | DoConvertToPng(); |
| 299 | } |
| 300 | |
| 301 | wxBitmapDataObject::~wxBitmapDataObject() |
| 302 | { |
| 303 | Clear(); |
| 304 | } |
| 305 | |
| 306 | void wxBitmapDataObject::SetBitmap( const wxBitmap &bitmap ) |
| 307 | { |
| 308 | ClearAll(); |
| 309 | |
| 310 | wxBitmapDataObjectBase::SetBitmap(bitmap); |
| 311 | |
| 312 | DoConvertToPng(); |
| 313 | } |
| 314 | |
| 315 | bool wxBitmapDataObject::GetDataHere(void *buf) const |
| 316 | { |
| 317 | if ( !m_pngSize ) |
| 318 | { |
| 319 | wxFAIL_MSG( wxT("attempt to copy empty bitmap failed") ); |
| 320 | |
| 321 | return FALSE; |
| 322 | } |
| 323 | |
| 324 | memcpy(buf, m_pngData, m_pngSize); |
| 325 | |
| 326 | return TRUE; |
| 327 | } |
| 328 | |
| 329 | bool wxBitmapDataObject::SetData(size_t size, const void *buf) |
| 330 | { |
| 331 | Clear(); |
| 332 | |
| 333 | #if wxUSE_LIBPNG |
| 334 | m_pngSize = size; |
| 335 | m_pngData = malloc(m_pngSize); |
| 336 | |
| 337 | memcpy( m_pngData, buf, m_pngSize ); |
| 338 | |
| 339 | wxMemoryInputStream mstream( (char*) m_pngData, m_pngSize ); |
| 340 | wxImage image; |
| 341 | wxPNGHandler handler; |
| 342 | if ( !handler.LoadFile( &image, mstream ) ) |
| 343 | { |
| 344 | return FALSE; |
| 345 | } |
| 346 | |
| 347 | m_bitmap = image.ConvertToBitmap(); |
| 348 | |
| 349 | return m_bitmap.Ok(); |
| 350 | #else |
| 351 | return FALSE; |
| 352 | #endif |
| 353 | } |
| 354 | |
| 355 | void wxBitmapDataObject::DoConvertToPng() |
| 356 | { |
| 357 | #if wxUSE_LIBPNG |
| 358 | if (!m_bitmap.Ok()) |
| 359 | return; |
| 360 | |
| 361 | wxImage image( m_bitmap ); |
| 362 | wxPNGHandler handler; |
| 363 | |
| 364 | wxCountingOutputStream count; |
| 365 | handler.SaveFile( &image, count ); |
| 366 | |
| 367 | m_pngSize = count.GetSize() + 100; // sometimes the size seems to vary ??? |
| 368 | m_pngData = malloc(m_pngSize); |
| 369 | |
| 370 | wxMemoryOutputStream mstream( (char*) m_pngData, m_pngSize ); |
| 371 | handler.SaveFile( &image, mstream ); |
| 372 | #endif |
| 373 | } |
| 374 | |
| 375 | |