1 ///////////////////////////////////////////////////////////////////////////////
3 // Purpose: wxDataObject class
4 // Author: Robert Roebling
6 // Copyright: (c) 1998 Robert Roebling
7 // Licence: wxWindows licence
8 ///////////////////////////////////////////////////////////////////////////////
10 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
11 #pragma implementation "dataobj.h"
14 // For compilers that support precompilation, includes "wx.h".
15 #include "wx/wxprec.h"
17 #include "wx/dataobj.h"
20 #include "wx/mstream.h"
26 //-------------------------------------------------------------------------
28 //-------------------------------------------------------------------------
30 GdkAtom g_textAtom
= 0;
31 GdkAtom g_altTextAtom
= 0;
32 GdkAtom g_pngAtom
= 0;
33 GdkAtom g_fileAtom
= 0;
35 //-------------------------------------------------------------------------
37 //-------------------------------------------------------------------------
39 wxDataFormat::wxDataFormat()
41 // do *not* call PrepareFormats() from here for 2 reasons:
43 // 1. we will have time to do it later because some other Set function
44 // must be called before we really need them
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;
53 wxDataFormat::wxDataFormat( wxDataFormatId type
)
59 wxDataFormat::wxDataFormat( const wxChar
*id
)
65 wxDataFormat::wxDataFormat( const wxString
&id
)
71 wxDataFormat::wxDataFormat( NativeFormat format
)
77 void wxDataFormat::SetType( wxDataFormatId type
)
84 if (m_type
== wxDF_UNICODETEXT
)
85 m_format
= g_textAtom
;
86 else if (m_type
== wxDF_TEXT
)
87 m_format
= g_altTextAtom
;
89 if (m_type
== wxDF_TEXT
|| m_type
== wxDF_UNICODETEXT
)
90 m_format
= g_textAtom
;
93 if (m_type
== wxDF_BITMAP
)
96 if (m_type
== wxDF_FILENAME
)
97 m_format
= g_fileAtom
;
100 wxFAIL_MSG( wxT("invalid dataformat") );
104 wxDataFormatId
wxDataFormat::GetType() const
109 wxString
wxDataFormat::GetId() const
111 wxString ret
= wxString::FromAscii( gdk_atom_name( m_format
) );
115 void wxDataFormat::SetId( NativeFormat format
)
120 if (m_format
== g_textAtom
)
122 m_type
= wxDF_UNICODETEXT
;
127 if (m_format
== g_altTextAtom
)
130 if (m_format
== g_pngAtom
)
131 m_type
= wxDF_BITMAP
;
133 if (m_format
== g_fileAtom
)
134 m_type
= wxDF_FILENAME
;
136 m_type
= wxDF_PRIVATE
;
139 void wxDataFormat::SetId( const wxChar
*id
)
142 m_type
= wxDF_PRIVATE
;
144 m_format
= gdk_atom_intern( (const char*) tmp
.ToAscii(), FALSE
);
147 void wxDataFormat::PrepareFormats()
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
158 g_textAtom
= gdk_atom_intern( "UTF8_STRING", FALSE
);
159 g_altTextAtom
= gdk_atom_intern( "STRING", FALSE
);
161 g_textAtom
= gdk_atom_intern( "STRING" /* "text/plain" */, FALSE
);
164 g_pngAtom
= gdk_atom_intern( "image/png", FALSE
);
166 g_fileAtom
= gdk_atom_intern( "text/uri-list", FALSE
);
169 //-------------------------------------------------------------------------
171 //-------------------------------------------------------------------------
173 wxDataObject::wxDataObject()
177 wxDataObject::~wxDataObject()
179 // dtor is empty but needed for Darwin and AIX -- otherwise it doesn't link
182 bool wxDataObject::IsSupportedFormat(const wxDataFormat
& format
, Direction dir
) const
184 size_t nFormatCount
= GetFormatCount(dir
);
185 if ( nFormatCount
== 1 )
187 return format
== GetPreferredFormat();
191 wxDataFormat
*formats
= new wxDataFormat
[nFormatCount
];
192 GetAllFormats(formats
,dir
);
195 for ( n
= 0; n
< nFormatCount
; n
++ )
197 if ( formats
[n
] == format
)
204 return n
< nFormatCount
;
208 // ----------------------------------------------------------------------------
210 // ----------------------------------------------------------------------------
212 #if defined(__WXGTK20__) && wxUSE_UNICODE
213 void wxTextDataObject::GetAllFormats(wxDataFormat
*formats
, wxDataObjectBase::Direction dir
) const
215 *formats
++ = GetPreferredFormat();
216 *formats
= g_altTextAtom
;
220 // ----------------------------------------------------------------------------
222 // ----------------------------------------------------------------------------
224 bool wxFileDataObject::GetDataHere(void *buf
) const
228 for (size_t i
= 0; i
< m_filenames
.GetCount(); i
++)
230 filenames
+= wxT("file:");
231 filenames
+= m_filenames
[i
];
232 filenames
+= wxT("\r\n");
235 memcpy( buf
, filenames
.mbc_str(), filenames
.Len() + 1 );
240 size_t wxFileDataObject::GetDataSize() const
244 for (size_t i
= 0; i
< m_filenames
.GetCount(); i
++)
246 // This is junk in UTF-8
247 res
+= m_filenames
[i
].Len();
248 res
+= 5 + 2; // "file:" (5) + "\r\n" (2)
254 bool wxFileDataObject::SetData(size_t WXUNUSED(size
), const void *buf
)
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"
261 for ( const char *p
= (const char *)buf
; ; p
++ )
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
)
268 size_t lenPrefix
= 5; // strlen("file:")
269 if ( filename
.Left(lenPrefix
).MakeLower() == _T("file:") )
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('/') )
280 AddFile(wxURL::ConvertFromURI(filename
.c_str() + lenPrefix
));
285 wxLogDebug(_T("Unsupported URI '%s' in wxFileDataObject"),
304 void wxFileDataObject::AddFile( const wxString
&filename
)
306 m_filenames
.Add( filename
);
309 // ----------------------------------------------------------------------------
310 // wxBitmapDataObject
311 // ----------------------------------------------------------------------------
313 wxBitmapDataObject::wxBitmapDataObject()
318 wxBitmapDataObject::wxBitmapDataObject( const wxBitmap
& bitmap
)
319 : wxBitmapDataObjectBase(bitmap
)
326 wxBitmapDataObject::~wxBitmapDataObject()
331 void wxBitmapDataObject::SetBitmap( const wxBitmap
&bitmap
)
335 wxBitmapDataObjectBase::SetBitmap(bitmap
);
340 bool wxBitmapDataObject::GetDataHere(void *buf
) const
344 wxFAIL_MSG( wxT("attempt to copy empty bitmap failed") );
349 memcpy(buf
, m_pngData
, m_pngSize
);
354 bool wxBitmapDataObject::SetData(size_t size
, const void *buf
)
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!") );
362 m_pngData
= malloc(m_pngSize
);
364 memcpy(m_pngData
, buf
, m_pngSize
);
366 wxMemoryInputStream
mstream((char*) m_pngData
, m_pngSize
);
368 if ( !image
.LoadFile( mstream
, wxBITMAP_TYPE_PNG
) )
373 m_bitmap
= wxBitmap(image
);
375 return m_bitmap
.Ok();
378 void wxBitmapDataObject::DoConvertToPng()
380 if ( !m_bitmap
.Ok() )
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!") );
386 wxImage image
= m_bitmap
.ConvertToImage();
388 wxCountingOutputStream count
;
389 image
.SaveFile(count
, wxBITMAP_TYPE_PNG
);
391 m_pngSize
= count
.GetSize() + 100; // sometimes the size seems to vary ???
392 m_pngData
= malloc(m_pngSize
);
394 wxMemoryOutputStream
mstream((char*) m_pngData
, m_pngSize
);
395 image
.SaveFile(mstream
, wxBITMAP_TYPE_PNG
);