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[wxWidgets.git] / src / gtk1 / dataobj.cpp
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 // For compilers that support precompilation, includes "wx.h".
11 #include "wx/wxprec.h"
12
13 #include "wx/dataobj.h"
14
15 #if wxUSE_DATAOBJ
16
17 #include "wx/app.h"
18 #include "wx/debug.h"
19 #include "wx/mstream.h"
20 #include "wx/image.h"
21 #include "wx/log.h"
22 #include "wx/uri.h"
23
24 #include <gdk/gdk.h>
25
26 //-------------------------------------------------------------------------
27 // global data
28 //-------------------------------------------------------------------------
29
30 GdkAtom g_textAtom = 0;
31 GdkAtom g_altTextAtom = 0;
32 GdkAtom g_pngAtom = 0;
33 GdkAtom g_fileAtom = 0;
34
35 //-------------------------------------------------------------------------
36 // wxDataFormat
37 //-------------------------------------------------------------------------
38
39 wxDataFormat::wxDataFormat()
40 {
41 // do *not* call PrepareFormats() from here for 2 reasons:
42 //
43 // 1. we will have time to do it later because some other Set function
44 // must be called before we really need them
45 //
46 // 2. doing so prevents us from declaring global wxDataFormats because
47 // calling PrepareFormats (and thus gdk_atom_intern) before GDK is
48 // initialised will result in a crash
49 m_type = wxDF_INVALID;
50 m_format = (GdkAtom) 0;
51 }
52
53 wxDataFormat::wxDataFormat( wxDataFormatId type )
54 {
55 PrepareFormats();
56 SetType( type );
57 }
58
59 wxDataFormat::wxDataFormat( const wxChar *id )
60 {
61 PrepareFormats();
62 SetId( id );
63 }
64
65 wxDataFormat::wxDataFormat( const wxString &id )
66 {
67 PrepareFormats();
68 SetId( id );
69 }
70
71 wxDataFormat::wxDataFormat( NativeFormat format )
72 {
73 PrepareFormats();
74 SetId( format );
75 }
76
77 void wxDataFormat::SetType( wxDataFormatId type )
78 {
79 PrepareFormats();
80
81 m_type = type;
82
83 #if wxUSE_UNICODE
84 if (m_type == wxDF_UNICODETEXT)
85 m_format = g_textAtom;
86 else if (m_type == wxDF_TEXT)
87 m_format = g_altTextAtom;
88 #else
89 if (m_type == wxDF_TEXT || m_type == wxDF_UNICODETEXT)
90 m_format = g_textAtom;
91 #endif
92 else
93 if (m_type == wxDF_BITMAP)
94 m_format = g_pngAtom;
95 else
96 if (m_type == wxDF_FILENAME)
97 m_format = g_fileAtom;
98 else
99 {
100 wxFAIL_MSG( wxT("invalid dataformat") );
101 }
102 }
103
104 wxDataFormatId wxDataFormat::GetType() const
105 {
106 return m_type;
107 }
108
109 wxString wxDataFormat::GetId() const
110 {
111 wxString ret = wxString::FromAscii( gdk_atom_name( m_format ) );
112 return ret;
113 }
114
115 void wxDataFormat::SetId( NativeFormat format )
116 {
117 PrepareFormats();
118 m_format = format;
119
120 if (m_format == g_textAtom)
121 #if wxUSE_UNICODE
122 m_type = wxDF_UNICODETEXT;
123 #else
124 m_type = wxDF_TEXT;
125 #endif
126 else
127 if (m_format == g_altTextAtom)
128 m_type = wxDF_TEXT;
129 else
130 if (m_format == g_pngAtom)
131 m_type = wxDF_BITMAP;
132 else
133 if (m_format == g_fileAtom)
134 m_type = wxDF_FILENAME;
135 else
136 m_type = wxDF_PRIVATE;
137 }
138
139 void wxDataFormat::SetId( const wxChar *id )
140 {
141 PrepareFormats();
142 m_type = wxDF_PRIVATE;
143 wxString tmp( id );
144 m_format = gdk_atom_intern( (const char*) tmp.ToAscii(), FALSE );
145 }
146
147 void wxDataFormat::PrepareFormats()
148 {
149 // VZ: GNOME included in RedHat 6.1 uses the MIME types below and not the
150 // atoms STRING and file:ALL as the old code was, but normal X apps
151 // use STRING for text selection when transfering the data via
152 // clipboard, for example, so do use STRING for now (GNOME apps will
153 // probably support STRING as well for compatibility anyhow), but use
154 // text/uri-list for file dnd because compatibility is not important
155 // here (with whom?)
156 if (!g_textAtom)
157 #if wxUSE_UNICODE
158 g_textAtom = gdk_atom_intern( "UTF8_STRING", FALSE );
159 g_altTextAtom = gdk_atom_intern( "STRING", FALSE );
160 #else
161 g_textAtom = gdk_atom_intern( "STRING" /* "text/plain" */, FALSE );
162 #endif
163 if (!g_pngAtom)
164 g_pngAtom = gdk_atom_intern( "image/png", FALSE );
165 if (!g_fileAtom)
166 g_fileAtom = gdk_atom_intern( "text/uri-list", FALSE );
167 }
168
169 //-------------------------------------------------------------------------
170 // wxDataObject
171 //-------------------------------------------------------------------------
172
173 wxDataObject::wxDataObject()
174 {
175 }
176
177 wxDataObject::~wxDataObject()
178 {
179 // dtor is empty but needed for Darwin and AIX -- otherwise it doesn't link
180 }
181
182 bool wxDataObject::IsSupportedFormat(const wxDataFormat& format, Direction dir) const
183 {
184 size_t nFormatCount = GetFormatCount(dir);
185 if ( nFormatCount == 1 )
186 {
187 return format == GetPreferredFormat();
188 }
189 else
190 {
191 wxDataFormat *formats = new wxDataFormat[nFormatCount];
192 GetAllFormats(formats,dir);
193
194 size_t n;
195 for ( n = 0; n < nFormatCount; n++ )
196 {
197 if ( formats[n] == format )
198 break;
199 }
200
201 delete [] formats;
202
203 // found?
204 return n < nFormatCount;
205 }
206 }
207
208 // ----------------------------------------------------------------------------
209 // wxTextDataObject
210 // ----------------------------------------------------------------------------
211
212 #if defined(__WXGTK20__) && wxUSE_UNICODE
213 void wxTextDataObject::GetAllFormats(wxDataFormat *formats, wxDataObjectBase::Direction dir) const
214 {
215 *formats++ = GetPreferredFormat();
216 *formats = g_altTextAtom;
217 }
218 #endif
219
220 // ----------------------------------------------------------------------------
221 // wxFileDataObject
222 // ----------------------------------------------------------------------------
223
224 bool wxFileDataObject::GetDataHere(void *buf) const
225 {
226 wxString filenames;
227
228 for (size_t i = 0; i < m_filenames.GetCount(); i++)
229 {
230 filenames += wxT("file:");
231 filenames += m_filenames[i];
232 filenames += wxT("\r\n");
233 }
234
235 memcpy( buf, filenames.mbc_str(), filenames.Len() + 1 );
236
237 return TRUE;
238 }
239
240 size_t wxFileDataObject::GetDataSize() const
241 {
242 size_t res = 0;
243
244 for (size_t i = 0; i < m_filenames.GetCount(); i++)
245 {
246 // This is junk in UTF-8
247 res += m_filenames[i].Len();
248 res += 5 + 2; // "file:" (5) + "\r\n" (2)
249 }
250
251 return res + 1;
252 }
253
254 bool wxFileDataObject::SetData(size_t WXUNUSED(size), const void *buf)
255 {
256 m_filenames.Empty();
257
258 // we get data in the text/uri-list format, i.e. as a sequence of URIs
259 // (filenames prefixed by "file:") delimited by "\r\n"
260 wxString filename;
261 for ( const char *p = (const char *)buf; ; p++ )
262 {
263 // some broken programs (testdnd GTK+ sample!) omit the trailing
264 // "\r\n", so check for '\0' explicitly here instead of doing it in
265 // the loop statement to account for it
266 if ( (*p == '\r' && *(p+1) == '\n') || !*p )
267 {
268 size_t lenPrefix = 5; // strlen("file:")
269 if ( filename.Left(lenPrefix).MakeLower() == _T("file:") )
270 {
271 // sometimes the syntax is "file:filename", sometimes it's
272 // URL-like: "file://filename" - deal with both
273 if ( filename[lenPrefix] == _T('/') &&
274 filename[lenPrefix + 1] == _T('/') )
275 {
276 // skip the slashes
277 lenPrefix += 2;
278 }
279
280 AddFile(wxURI::Unescape(filename.c_str() + lenPrefix));
281 filename.Empty();
282 }
283 else
284 {
285 wxLogDebug(_T("Unsupported URI '%s' in wxFileDataObject"),
286 filename.c_str());
287 }
288
289 if ( !*p )
290 break;
291
292 // skip '\r'
293 p++;
294 }
295 else
296 {
297 filename += *p;
298 }
299 }
300
301 return TRUE;
302 }
303
304 void wxFileDataObject::AddFile( const wxString &filename )
305 {
306 m_filenames.Add( filename );
307 }
308
309 // ----------------------------------------------------------------------------
310 // wxBitmapDataObject
311 // ----------------------------------------------------------------------------
312
313 wxBitmapDataObject::wxBitmapDataObject()
314 {
315 Init();
316 }
317
318 wxBitmapDataObject::wxBitmapDataObject( const wxBitmap& bitmap )
319 : wxBitmapDataObjectBase(bitmap)
320 {
321 Init();
322
323 DoConvertToPng();
324 }
325
326 wxBitmapDataObject::~wxBitmapDataObject()
327 {
328 Clear();
329 }
330
331 void wxBitmapDataObject::SetBitmap( const wxBitmap &bitmap )
332 {
333 ClearAll();
334
335 wxBitmapDataObjectBase::SetBitmap(bitmap);
336
337 DoConvertToPng();
338 }
339
340 bool wxBitmapDataObject::GetDataHere(void *buf) const
341 {
342 if ( !m_pngSize )
343 {
344 wxFAIL_MSG( wxT("attempt to copy empty bitmap failed") );
345
346 return FALSE;
347 }
348
349 memcpy(buf, m_pngData, m_pngSize);
350
351 return TRUE;
352 }
353
354 bool wxBitmapDataObject::SetData(size_t size, const void *buf)
355 {
356 Clear();
357
358 wxCHECK_MSG( wxImage::FindHandler(wxBITMAP_TYPE_PNG) != NULL,
359 FALSE, wxT("You must call wxImage::AddHandler(new wxPNGHandler); to be able to use clipboard with bitmaps!") );
360
361 m_pngSize = size;
362 m_pngData = malloc(m_pngSize);
363
364 memcpy(m_pngData, buf, m_pngSize);
365
366 wxMemoryInputStream mstream((char*) m_pngData, m_pngSize);
367 wxImage image;
368 if ( !image.LoadFile( mstream, wxBITMAP_TYPE_PNG ) )
369 {
370 return FALSE;
371 }
372
373 m_bitmap = wxBitmap(image);
374
375 return m_bitmap.Ok();
376 }
377
378 void wxBitmapDataObject::DoConvertToPng()
379 {
380 if ( !m_bitmap.Ok() )
381 return;
382
383 wxCHECK_RET( wxImage::FindHandler(wxBITMAP_TYPE_PNG) != NULL,
384 wxT("You must call wxImage::AddHandler(new wxPNGHandler); to be able to use clipboard with bitmaps!") );
385
386 wxImage image = m_bitmap.ConvertToImage();
387
388 wxCountingOutputStream count;
389 image.SaveFile(count, wxBITMAP_TYPE_PNG);
390
391 m_pngSize = count.GetSize() + 100; // sometimes the size seems to vary ???
392 m_pngData = malloc(m_pngSize);
393
394 wxMemoryOutputStream mstream((char*) m_pngData, m_pngSize);
395 image.SaveFile(mstream, wxBITMAP_TYPE_PNG);
396 }
397
398 #endif // wxUSE_DATAOBJ