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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
30GdkAtom g_textAtom = 0;
31GdkAtom g_altTextAtom = 0;
32GdkAtom g_pngAtom = 0;
33GdkAtom g_fileAtom = 0;
34
35//-------------------------------------------------------------------------
36// wxDataFormat
37//-------------------------------------------------------------------------
38
39wxDataFormat::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
53wxDataFormat::wxDataFormat( wxDataFormatId type )
54{
55 PrepareFormats();
56 SetType( type );
57}
58
59wxDataFormat::wxDataFormat( const wxChar *id )
60{
61 PrepareFormats();
62 SetId( id );
63}
64
65wxDataFormat::wxDataFormat( const wxString &id )
66{
67 PrepareFormats();
68 SetId( id );
69}
70
71wxDataFormat::wxDataFormat( NativeFormat format )
72{
73 PrepareFormats();
74 SetId( format );
75}
76
77void 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
104wxDataFormatId wxDataFormat::GetType() const
105{
106 return m_type;
107}
108
109wxString wxDataFormat::GetId() const
110{
111 wxString ret = wxString::FromAscii( gdk_atom_name( m_format ) );
112 return ret;
113}
114
115void 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
139void 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
147void 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
173wxDataObject::wxDataObject()
174{
175}
176
177wxDataObject::~wxDataObject()
178{
179 // dtor is empty but needed for Darwin and AIX -- otherwise it doesn't link
180}
181
182bool 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// wxFileDataObject
210// ----------------------------------------------------------------------------
211
212bool wxFileDataObject::GetDataHere(void *buf) const
213{
214 wxString filenames;
215
216 for (size_t i = 0; i < m_filenames.GetCount(); i++)
217 {
218 filenames += wxT("file:");
219 filenames += m_filenames[i];
220 filenames += wxT("\r\n");
221 }
222
223 memcpy( buf, filenames.mbc_str(), filenames.Len() + 1 );
224
225 return TRUE;
226}
227
228size_t wxFileDataObject::GetDataSize() const
229{
230 size_t res = 0;
231
232 for (size_t i = 0; i < m_filenames.GetCount(); i++)
233 {
234 // This is junk in UTF-8
235 res += m_filenames[i].Len();
236 res += 5 + 2; // "file:" (5) + "\r\n" (2)
237 }
238
239 return res + 1;
240}
241
242bool wxFileDataObject::SetData(size_t WXUNUSED(size), const void *buf)
243{
244 m_filenames.Empty();
245
246 // we get data in the text/uri-list format, i.e. as a sequence of URIs
247 // (filenames prefixed by "file:") delimited by "\r\n"
248 wxString filename;
249 for ( const char *p = (const char *)buf; ; p++ )
250 {
251 // some broken programs (testdnd GTK+ sample!) omit the trailing
252 // "\r\n", so check for '\0' explicitly here instead of doing it in
253 // the loop statement to account for it
254 if ( (*p == '\r' && *(p+1) == '\n') || !*p )
255 {
256 size_t lenPrefix = 5; // strlen("file:")
257 if ( filename.Left(lenPrefix).MakeLower() == _T("file:") )
258 {
259 // sometimes the syntax is "file:filename", sometimes it's
260 // URL-like: "file://filename" - deal with both
261 if ( filename[lenPrefix] == _T('/') &&
262 filename[lenPrefix + 1] == _T('/') )
263 {
264 // skip the slashes
265 lenPrefix += 2;
266 }
267
268 AddFile(wxURI::Unescape(filename.c_str() + lenPrefix));
269 filename.Empty();
270 }
271 else
272 {
273 wxLogDebug(_T("Unsupported URI '%s' in wxFileDataObject"),
274 filename.c_str());
275 }
276
277 if ( !*p )
278 break;
279
280 // skip '\r'
281 p++;
282 }
283 else
284 {
285 filename += *p;
286 }
287 }
288
289 return TRUE;
290}
291
292void wxFileDataObject::AddFile( const wxString &filename )
293{
294 m_filenames.Add( filename );
295}
296
297// ----------------------------------------------------------------------------
298// wxBitmapDataObject
299// ----------------------------------------------------------------------------
300
301wxBitmapDataObject::wxBitmapDataObject()
302{
303 Init();
304}
305
306wxBitmapDataObject::wxBitmapDataObject( const wxBitmap& bitmap )
307 : wxBitmapDataObjectBase(bitmap)
308{
309 Init();
310
311 DoConvertToPng();
312}
313
314wxBitmapDataObject::~wxBitmapDataObject()
315{
316 Clear();
317}
318
319void wxBitmapDataObject::SetBitmap( const wxBitmap &bitmap )
320{
321 ClearAll();
322
323 wxBitmapDataObjectBase::SetBitmap(bitmap);
324
325 DoConvertToPng();
326}
327
328bool wxBitmapDataObject::GetDataHere(void *buf) const
329{
330 if ( !m_pngSize )
331 {
332 wxFAIL_MSG( wxT("attempt to copy empty bitmap failed") );
333
334 return FALSE;
335 }
336
337 memcpy(buf, m_pngData, m_pngSize);
338
339 return TRUE;
340}
341
342bool wxBitmapDataObject::SetData(size_t size, const void *buf)
343{
344 Clear();
345
346 wxCHECK_MSG( wxImage::FindHandler(wxBITMAP_TYPE_PNG) != NULL,
347 FALSE, wxT("You must call wxImage::AddHandler(new wxPNGHandler); to be able to use clipboard with bitmaps!") );
348
349 m_pngSize = size;
350 m_pngData = malloc(m_pngSize);
351
352 memcpy(m_pngData, buf, m_pngSize);
353
354 wxMemoryInputStream mstream((char*) m_pngData, m_pngSize);
355 wxImage image;
356 if ( !image.LoadFile( mstream, wxBITMAP_TYPE_PNG ) )
357 {
358 return FALSE;
359 }
360
361 m_bitmap = wxBitmap(image);
362
363 return m_bitmap.Ok();
364}
365
366void wxBitmapDataObject::DoConvertToPng()
367{
368 if ( !m_bitmap.Ok() )
369 return;
370
371 wxCHECK_RET( wxImage::FindHandler(wxBITMAP_TYPE_PNG) != NULL,
372 wxT("You must call wxImage::AddHandler(new wxPNGHandler); to be able to use clipboard with bitmaps!") );
373
374 wxImage image = m_bitmap.ConvertToImage();
375
376 wxCountingOutputStream count;
377 image.SaveFile(count, wxBITMAP_TYPE_PNG);
378
379 m_pngSize = count.GetSize() + 100; // sometimes the size seems to vary ???
380 m_pngData = malloc(m_pngSize);
381
382 wxMemoryOutputStream mstream((char*) m_pngData, m_pngSize);
383 image.SaveFile(mstream, wxBITMAP_TYPE_PNG);
384}
385
386#endif // wxUSE_DATAOBJ