src/gtk1/clipbrd.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        clipbrd.cpp
// Purpose:
// Author:      Robert Roebling
// Id:          $Id$
// Copyright:   (c) 1998 Robert Roebling
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "clipbrd.h"
#endif

#include "wx/clipbrd.h"

//-----------------------------------------------------------------------------
// data
//-----------------------------------------------------------------------------

wxClipboard *wxTheClipboard = (wxClipboard*) NULL;

GdkAtom  g_textAtom        = 0;
GdkAtom  g_clipboardAtom   = 0;
GdkAtom  g_targetsAtom     = 0;

//-----------------------------------------------------------------------------
// reminder
//-----------------------------------------------------------------------------

/* The contents of a selection are returned in a GtkSelectionData
   structure. selection/target identify the request.
   type specifies the type of the return; if length < 0, and
   the data should be ignored. This structure has object semantics -
   no fields should be modified directly, they should not be created
   directly, and pointers to them should not be stored beyond the duration of
   a callback. (If the last is changed, we'll need to add reference
   counting)

struct _GtkSelectionData
{
  GdkAtom selection;
  GdkAtom target;
  GdkAtom type;
  gint	  format;
  guchar *data;
  gint	  length;
};

*/

//-----------------------------------------------------------------------------
// "selection_received" for targets
//-----------------------------------------------------------------------------

static void
targets_selection_received( GtkWidget *WXUNUSED(widget),
                            GtkSelectionData *selection_data,
		            wxClipboard *clipboard )
{
    if (!wxTheClipboard) return;

    if (selection_data->length <= 0) return;

    // make sure we got the data in the correct form
    if (selection_data->type != GDK_SELECTION_TYPE_ATOM) return;

    // the atoms we received, holding a list of targets (= formats)
    GdkAtom *atoms = (GdkAtom *)selection_data->data;

    for (unsigned int i=0; i<selection_data->length/sizeof(GdkAtom); i++)
    {
        if (atoms[i] == clipboard->m_targetRequested)
        {
            clipboard->m_formatSupported = TRUE;
            return;
        }
    }

    return;
}

//-----------------------------------------------------------------------------
// "selection_received" for the actual data
//-----------------------------------------------------------------------------

static void
selection_received( GtkWidget *WXUNUSED(widget),
                    GtkSelectionData *selection_data,
		    wxClipboard *clipboard )
{
    if (!wxTheClipboard) return;

    wxDataObject *data_object = clipboard->m_receivedData;

    if (!data_object) return;

    if (selection_data->length <= 0) return;

    // make sure we got the data in the correct format

    if (data_object->m_formatAtom != selection_data->target) return;

    // make sure we got the data in the correct form (selection type).
    // if so, copy data to target object

    switch (data_object->GetFormat())
    {
        case wxDF_TEXT:
	{
            if (selection_data->type != GDK_SELECTION_TYPE_STRING) return;

	    wxTextDataObject *text_object = (wxTextDataObject *) data_object;

	    wxString text = (const char*) selection_data->data;

	    text_object->SetText( text );

	    break;
	}

	case wxDF_BITMAP:
	{
            if (selection_data->type != GDK_SELECTION_TYPE_BITMAP) return;

	    return;

	    break;
	}

	case wxDF_PRIVATE:
	{
            if (selection_data->type != GDK_SELECTION_TYPE_STRING) return;

	    wxPrivateDataObject *private_object = (wxPrivateDataObject *) data_object;

	    private_object->SetData( (const char*) selection_data->data, (size_t) selection_data->length );

	    break;
	}

	default:
	{
	    return;
	}
    }

    wxTheClipboard->m_formatSupported = TRUE;
}

//-----------------------------------------------------------------------------
// "selection_clear"
//-----------------------------------------------------------------------------

static gint
selection_clear_clip( GtkWidget *WXUNUSED(widget), GdkEventSelection *event )
{
    if (!wxTheClipboard) return TRUE;

    if (event->selection == GDK_SELECTION_PRIMARY)
    {
        wxTheClipboard->m_ownsPrimarySelection = FALSE;
    }
    else
    if (event->selection == g_clipboardAtom)
    {
        wxTheClipboard->m_ownsClipboard = FALSE;
    }
    else
    {
        return FALSE;
    }

    if ((!wxTheClipboard->m_ownsPrimarySelection) &&
        (!wxTheClipboard->m_ownsClipboard))
    {
        // the clipboard is no longer in our hands. we can the
        // clipboard data.

        wxTheClipboard->m_dataObjects.Clear();
    }

    return TRUE;
}

//-----------------------------------------------------------------------------
// selection handler for supplying data
//-----------------------------------------------------------------------------

static void
selection_handler( GtkWidget *WXUNUSED(widget), GtkSelectionData *selection_data, gpointer WXUNUSED(data) )
{
    if (!wxTheClipboard) return;

    wxNode *node = wxTheClipboard->m_dataObjects.First();

    while (node)
    {
        wxDataObject *data_object = (wxDataObject *)node->Data();

	if (data_object->m_formatAtom != selection_data->target)
	{
	    node = node->Next();
	    break;
	}

	switch (data_object->GetFormat())
	{
	    case wxDF_TEXT:
	    {
	        wxTextDataObject *text_object = (wxTextDataObject*) data_object;

	        wxString text = text_object->GetText();

		char *s = WXSTRINGCAST text;
		int len = (int) text.Length();

                gtk_selection_data_set(
                    selection_data,
		    GDK_SELECTION_TYPE_STRING,
		    8*sizeof(gchar),
		    (unsigned char*) s,
		    len );

		break;
	    }

	    case wxDF_BITMAP:
	    {
	        // wxBitmapDataObject *private_object = (wxBitmapDataObject*) data_object;

		// how do we do that ?

		break;
	    }

	    case wxDF_PRIVATE:
            {
	        wxPrivateDataObject *private_object = (wxPrivateDataObject*) data_object;

	        if (private_object->GetDataSize() == 0) return;

                gtk_selection_data_set(
                    selection_data,
		    GDK_SELECTION_TYPE_STRING,
		    8*sizeof(gchar),
		    (unsigned char*) private_object->GetData(),
		    (int) private_object->GetDataSize() );
	    }

	    default:
	      break;
        }

	node = node->Next();
    }
}

//-----------------------------------------------------------------------------
// wxClipboard
//-----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)

wxClipboard::wxClipboard()
{
    m_open = FALSE;

    m_ownsClipboard = FALSE;
    m_ownsPrimarySelection = FALSE;

    m_dataObjects.DeleteContents( TRUE );

    m_receivedData = (wxDataObject*) NULL;

    m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
    gtk_widget_realize( m_clipboardWidget );

    gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
                        "selection_clear_event",
		        GTK_SIGNAL_FUNC( selection_clear_clip ),
		        (gpointer) NULL );

    if (!g_clipboardAtom) g_clipboardAtom = gdk_atom_intern( "CLIPBOARD", FALSE );
    if (!g_textAtom) g_textAtom = gdk_atom_intern( "TEXT", FALSE );
    if (!g_targetsAtom) g_targetsAtom = gdk_atom_intern ("TARGETS", FALSE);

    m_formatSupported = FALSE;
    m_targetRequested = 0;
}

wxClipboard::~wxClipboard()
{
    Clear();

    if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
}

void wxClipboard::Clear()
{
    if (m_dataObjects.GetCount())
    {
        /*  As we have data we also own the clipboard. Once we no longer own
            it, clear_selection is called which will set m_data to zero */

        if (gdk_selection_owner_get( g_clipboardAtom ) == m_clipboardWidget->window)
        {
            gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom, GDK_CURRENT_TIME );
        }

        if (gdk_selection_owner_get( GDK_SELECTION_PRIMARY ) == m_clipboardWidget->window)
        {
            gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY, GDK_CURRENT_TIME );
        }

        m_dataObjects.Clear();
    }

    m_targetRequested = 0;

    m_formatSupported = FALSE;
}

bool wxClipboard::Open()
{
    wxCHECK_MSG( !m_open, FALSE, "clipboard already open" );

    m_open = TRUE;

    return TRUE;
}

bool wxClipboard::SetData( wxDataObject *data )
{
    wxCHECK_MSG( data, FALSE, "data is invalid" );

    wxNode *node = m_dataObjects.First();

    while (node)
    {
        wxDataObject *d = (wxDataObject*)node->Data();

	if (d->GetFormat() == data->GetFormat())
	{
	    m_dataObjects.DeleteNode( node );

	    break;
	}

        node = node->Next();
    }

    m_dataObjects.Append( data );

    wxCHECK_MSG( m_open, FALSE, "clipboard not open" );

    if (data->GetFormat() == wxDF_PRIVATE)
    {
        wxPrivateDataObject* pd = (wxPrivateDataObject*) data;

        wxCHECK_MSG( !pd->GetId().IsEmpty(), FALSE, "private clipboard format requires ID string" );

        data->m_formatAtom = GetTargetAtom( data->GetFormat(), pd->GetId() );
    }
    else
    {
        data->m_formatAtom = GetTargetAtom( data->GetFormat() );
    }

    // This should happen automatically

    m_ownsClipboard = FALSE;
    m_ownsPrimarySelection = FALSE;

    // Add handlers if someone requests data

    gtk_selection_add_handler( m_clipboardWidget,
                               g_clipboardAtom,
			       data->m_formatAtom,
			       selection_handler,
			       NULL );

    gtk_selection_add_handler( m_clipboardWidget,
                               GDK_SELECTION_PRIMARY,
			       data->m_formatAtom,
			       selection_handler,
			       NULL );

    // Tell the world we offer clipboard data

    if (!gtk_selection_owner_set( m_clipboardWidget,
                                  g_clipboardAtom,
				  GDK_CURRENT_TIME ))
    {
        return FALSE;
    }
    m_ownsClipboard = TRUE;

    if (!gtk_selection_owner_set( m_clipboardWidget,
                                  GDK_SELECTION_PRIMARY,
				  GDK_CURRENT_TIME ))
    {
        return FALSE;
    }
    m_ownsPrimarySelection = TRUE;

    return TRUE;
}

void wxClipboard::Close()
{
    wxCHECK_RET( m_open, "clipboard not open" );

    m_open = FALSE;
}

bool wxClipboard::IsSupportedFormat( wxDataFormat format, const wxString &id )
{
    m_targetRequested = GetTargetAtom( format, id );

    if (m_targetRequested == 0) return FALSE;

    // add handler for target (= format) query

    gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
                        "selection_received",
		        GTK_SIGNAL_FUNC( targets_selection_received ),
		        (gpointer) this );

    m_formatSupported = FALSE;

    // perform query. this will set m_formatSupported to
    // TRUE if m_targetRequested is supported

    gtk_selection_convert( m_clipboardWidget,
			   g_clipboardAtom,
			   g_targetsAtom,
			   GDK_CURRENT_TIME );

    gtk_signal_disconnect_by_func( GTK_OBJECT(m_clipboardWidget),
		                   GTK_SIGNAL_FUNC( targets_selection_received ),
		                   (gpointer) this );

    if (!m_formatSupported) return FALSE;

    return TRUE;
}

bool wxClipboard::GetData( wxDataObject *data )
{
    wxCHECK_MSG( m_open, FALSE, "clipboard not open" );

    m_receivedData = data;

    wxCHECK_MSG( m_receivedData, FALSE, "invalid data object" );

    if (m_receivedData->GetFormat() == wxDF_PRIVATE)
    {
        wxPrivateDataObject* pd = (wxPrivateDataObject*) m_receivedData;

        wxCHECK_MSG( !pd->GetId().IsEmpty(), FALSE, "private clipboard format requires ID string" );

        m_targetRequested = GetTargetAtom( m_receivedData->GetFormat(), pd->GetId() );
    }
    else
    {
        m_targetRequested = GetTargetAtom( m_receivedData->GetFormat() );
    }

    data->m_formatAtom = m_targetRequested;

    wxCHECK_MSG( m_targetRequested, FALSE, "unsupported clipboard format" );

    m_formatSupported = FALSE;

    gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
                        "selection_received",
		        GTK_SIGNAL_FUNC( selection_received ),
		        (gpointer) this );

    gtk_selection_convert( m_clipboardWidget,
			   g_clipboardAtom,
			   m_targetRequested,
			   GDK_CURRENT_TIME );

    gtk_signal_disconnect_by_func( GTK_OBJECT(m_clipboardWidget),
		                   GTK_SIGNAL_FUNC( selection_received ),
		                   (gpointer) this );

    wxCHECK_MSG( m_formatSupported, FALSE, "error retrieving data from clipboard" );

    return TRUE;
}

GdkAtom wxClipboard::GetTargetAtom( wxDataFormat format, const wxString &id )
{
    // What is X representation of that format?

    switch (format)
    {
        case wxDF_TEXT:
        {
            return GDK_TARGET_STRING;
				// g_textAtom
        }

        case wxDF_BITMAP:
        {
            return GDK_TARGET_BITMAP;
            break;
        }

        case wxDF_PRIVATE:
        {
            // we create our own X representation

            return gdk_atom_intern( WXSTRINGCAST( id ), FALSE );
        }

	default:
	{
	    return (GdkAtom) 0;
	}
    }

    return (GdkAtom) 0;
}

//-----------------------------------------------------------------------------
// wxClipboardModule
//-----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxClipboardModule,wxModule)

bool wxClipboardModule::OnInit()
{
    wxTheClipboard = new wxClipboard();

    return TRUE;
}

void wxClipboardModule::OnExit()
{
    if (wxTheClipboard) delete wxTheClipboard;
    wxTheClipboard = (wxClipboard*) NULL;
}
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: clipbrd.cpp
	3	// Purpose:
	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 "clipbrd.h"
	12	#endif
	13
	14	#include "wx/clipbrd.h"
	15
	16	//-----------------------------------------------------------------------------
	17	// data
	18	//-----------------------------------------------------------------------------
	19
	20	wxClipboard wxTheClipboard = (wxClipboard) NULL;
	21
	22	GdkAtom g_textAtom = 0;
	23	GdkAtom g_clipboardAtom = 0;
	24	GdkAtom g_targetsAtom = 0;
	25
	26	//-----------------------------------------------------------------------------
	27	// reminder
	28	//-----------------------------------------------------------------------------
	29
	30	/* The contents of a selection are returned in a GtkSelectionData
	31	structure. selection/target identify the request.
	32	type specifies the type of the return; if length < 0, and
	33	the data should be ignored. This structure has object semantics -
	34	no fields should be modified directly, they should not be created
	35	directly, and pointers to them should not be stored beyond the duration of
	36	a callback. (If the last is changed, we'll need to add reference
	37	counting)
	38
	39	struct _GtkSelectionData
	40	{
	41	GdkAtom selection;
	42	GdkAtom target;
	43	GdkAtom type;
	44	gint format;
	45	guchar *data;
	46	gint length;
	47	};
	48
	49	*/
	50
	51	//-----------------------------------------------------------------------------
	52	// "selection_received" for targets
	53	//-----------------------------------------------------------------------------
	54
	55	static void
	56	targets_selection_received( GtkWidget *WXUNUSED(widget),
	57	GtkSelectionData *selection_data,
	58	wxClipboard *clipboard )
	59	{
	60	if (!wxTheClipboard) return;
	61
	62	if (selection_data->length <= 0) return;
	63
	64	// make sure we got the data in the correct form
	65	if (selection_data->type != GDK_SELECTION_TYPE_ATOM) return;
	66
	67	// the atoms we received, holding a list of targets (= formats)
	68	GdkAtom atoms = (GdkAtom )selection_data->data;
	69
	70	for (unsigned int i=0; i<selection_data->length/sizeof(GdkAtom); i++)
	71	{
	72	if (atoms[i] == clipboard->m_targetRequested)
	73	{
	74	clipboard->m_formatSupported = TRUE;
	75	return;
	76	}
	77	}
	78
	79	return;
	80	}
	81
	82	//-----------------------------------------------------------------------------
	83	// "selection_received" for the actual data
	84	//-----------------------------------------------------------------------------
	85
	86	static void
	87	selection_received( GtkWidget *WXUNUSED(widget),
	88	GtkSelectionData *selection_data,
	89	wxClipboard *clipboard )
	90	{
	91	if (!wxTheClipboard) return;
	92
	93	wxDataObject *data_object = clipboard->m_receivedData;
	94
	95	if (!data_object) return;
	96
	97	if (selection_data->length <= 0) return;
	98
	99	// make sure we got the data in the correct format
	100
	101	if (data_object->m_formatAtom != selection_data->target) return;
	102
	103	// make sure we got the data in the correct form (selection type).
	104	// if so, copy data to target object
	105
	106	switch (data_object->GetFormat())
	107	{
	108	case wxDF_TEXT:
	109	{
	110	if (selection_data->type != GDK_SELECTION_TYPE_STRING) return;
	111
	112	wxTextDataObject text_object = (wxTextDataObject ) data_object;
	113
	114	wxString text = (const char*) selection_data->data;
	115
	116	text_object->SetText( text );
	117
	118	break;
	119	}
	120
	121	case wxDF_BITMAP:
	122	{
	123	if (selection_data->type != GDK_SELECTION_TYPE_BITMAP) return;
	124
	125	return;
	126
	127	break;
	128	}
	129
	130	case wxDF_PRIVATE:
	131	{
	132	if (selection_data->type != GDK_SELECTION_TYPE_STRING) return;
	133
	134	wxPrivateDataObject private_object = (wxPrivateDataObject ) data_object;
	135
	136	private_object->SetData( (const char*) selection_data->data, (size_t) selection_data->length );
	137
	138	break;
	139	}
	140
	141	default:
	142	{
	143	return;
	144	}
	145	}
	146
	147	wxTheClipboard->m_formatSupported = TRUE;
	148	}
	149
	150	//-----------------------------------------------------------------------------
	151	// "selection_clear"
	152	//-----------------------------------------------------------------------------
	153
	154	static gint
	155	selection_clear_clip( GtkWidget WXUNUSED(widget), GdkEventSelection event )
	156	{
	157	if (!wxTheClipboard) return TRUE;
	158
	159	if (event->selection == GDK_SELECTION_PRIMARY)
	160	{
	161	wxTheClipboard->m_ownsPrimarySelection = FALSE;
	162	}
	163	else
	164	if (event->selection == g_clipboardAtom)
	165	{
	166	wxTheClipboard->m_ownsClipboard = FALSE;
	167	}
	168	else
	169	{
	170	return FALSE;
	171	}
	172
	173	if ((!wxTheClipboard->m_ownsPrimarySelection) &&
	174	(!wxTheClipboard->m_ownsClipboard))
	175	{
	176	// the clipboard is no longer in our hands. we can the
	177	// clipboard data.
	178
	179	wxTheClipboard->m_dataObjects.Clear();
	180	}
	181
	182	return TRUE;
	183	}
	184
	185	//-----------------------------------------------------------------------------
	186	// selection handler for supplying data
	187	//-----------------------------------------------------------------------------
	188
	189	static void
	190	selection_handler( GtkWidget WXUNUSED(widget), GtkSelectionData selection_data, gpointer WXUNUSED(data) )
	191	{
	192	if (!wxTheClipboard) return;
	193
	194	wxNode *node = wxTheClipboard->m_dataObjects.First();
	195
	196	while (node)
	197	{
	198	wxDataObject data_object = (wxDataObject )node->Data();
	199
	200	if (data_object->m_formatAtom != selection_data->target)
	201	{
	202	node = node->Next();
	203	break;
	204	}
	205
	206	switch (data_object->GetFormat())
	207	{
	208	case wxDF_TEXT:
	209	{
	210	wxTextDataObject text_object = (wxTextDataObject) data_object;
	211
	212	wxString text = text_object->GetText();
	213
	214	char *s = WXSTRINGCAST text;
	215	int len = (int) text.Length();
	216
	217	gtk_selection_data_set(
	218	selection_data,
	219	GDK_SELECTION_TYPE_STRING,
	220	8*sizeof(gchar),
	221	(unsigned char*) s,
	222	len );
	223
	224	break;
	225	}
	226
	227	case wxDF_BITMAP:
	228	{
	229	// wxBitmapDataObject private_object = (wxBitmapDataObject) data_object;
	230
	231	// how do we do that ?
	232
	233	break;
	234	}
	235
	236	case wxDF_PRIVATE:
	237	{
	238	wxPrivateDataObject private_object = (wxPrivateDataObject) data_object;
	239
	240	if (private_object->GetDataSize() == 0) return;
	241
	242	gtk_selection_data_set(
	243	selection_data,
	244	GDK_SELECTION_TYPE_STRING,
	245	8*sizeof(gchar),
	246	(unsigned char*) private_object->GetData(),
	247	(int) private_object->GetDataSize() );
	248	}
	249
	250	default:
	251	break;
	252	}
	253
	254	node = node->Next();
	255	}
	256	}
	257
	258	//-----------------------------------------------------------------------------
	259	// wxClipboard
	260	//-----------------------------------------------------------------------------
	261
	262	IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
	263
	264	wxClipboard::wxClipboard()
	265	{
	266	m_open = FALSE;
	267
	268	m_ownsClipboard = FALSE;
	269	m_ownsPrimarySelection = FALSE;
	270
	271	m_dataObjects.DeleteContents( TRUE );
	272
	273	m_receivedData = (wxDataObject*) NULL;
	274
	275	m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
	276	gtk_widget_realize( m_clipboardWidget );
	277
	278	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	279	"selection_clear_event",
	280	GTK_SIGNAL_FUNC( selection_clear_clip ),
	281	(gpointer) NULL );
	282
	283	if (!g_clipboardAtom) g_clipboardAtom = gdk_atom_intern( "CLIPBOARD", FALSE );
	284	if (!g_textAtom) g_textAtom = gdk_atom_intern( "TEXT", FALSE );
	285	if (!g_targetsAtom) g_targetsAtom = gdk_atom_intern ("TARGETS", FALSE);
	286
	287	m_formatSupported = FALSE;
	288	m_targetRequested = 0;
	289	}
	290
	291	wxClipboard::~wxClipboard()
	292	{
	293	Clear();
	294
	295	if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
	296	}
	297
	298	void wxClipboard::Clear()
	299	{
	300	if (m_dataObjects.GetCount())
	301	{
	302	/* As we have data we also own the clipboard. Once we no longer own
	303	it, clear_selection is called which will set m_data to zero */
	304
	305	if (gdk_selection_owner_get( g_clipboardAtom ) == m_clipboardWidget->window)
	306	{
	307	gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom, GDK_CURRENT_TIME );
	308	}
	309
	310	if (gdk_selection_owner_get( GDK_SELECTION_PRIMARY ) == m_clipboardWidget->window)
	311	{
	312	gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY, GDK_CURRENT_TIME );
	313	}
	314
	315	m_dataObjects.Clear();
	316	}
	317
	318	m_targetRequested = 0;
	319
	320	m_formatSupported = FALSE;
	321	}
	322
	323	bool wxClipboard::Open()
	324	{
	325	wxCHECK_MSG( !m_open, FALSE, "clipboard already open" );
	326
	327	m_open = TRUE;
	328
	329	return TRUE;
	330	}
	331
	332	bool wxClipboard::SetData( wxDataObject *data )
	333	{
	334	wxCHECK_MSG( data, FALSE, "data is invalid" );
	335
	336	wxNode *node = m_dataObjects.First();
	337
	338	while (node)
	339	{
	340	wxDataObject d = (wxDataObject)node->Data();
	341
	342	if (d->GetFormat() == data->GetFormat())
	343	{
	344	m_dataObjects.DeleteNode( node );
	345
	346	break;
	347	}
	348
	349	node = node->Next();
	350	}
	351
	352	m_dataObjects.Append( data );
	353
	354	wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
	355
	356	if (data->GetFormat() == wxDF_PRIVATE)
	357	{
	358	wxPrivateDataObject* pd = (wxPrivateDataObject*) data;
	359
	360	wxCHECK_MSG( !pd->GetId().IsEmpty(), FALSE, "private clipboard format requires ID string" );
	361
	362	data->m_formatAtom = GetTargetAtom( data->GetFormat(), pd->GetId() );
	363	}
	364	else
	365	{
	366	data->m_formatAtom = GetTargetAtom( data->GetFormat() );
	367	}
	368
	369	// This should happen automatically
	370
	371	m_ownsClipboard = FALSE;
	372	m_ownsPrimarySelection = FALSE;
	373
	374	// Add handlers if someone requests data
	375
	376	gtk_selection_add_handler( m_clipboardWidget,
	377	g_clipboardAtom,
	378	data->m_formatAtom,
	379	selection_handler,
	380	NULL );
	381
	382	gtk_selection_add_handler( m_clipboardWidget,
	383	GDK_SELECTION_PRIMARY,
	384	data->m_formatAtom,
	385	selection_handler,
	386	NULL );
	387
	388	// Tell the world we offer clipboard data
	389
	390	if (!gtk_selection_owner_set( m_clipboardWidget,
	391	g_clipboardAtom,
	392	GDK_CURRENT_TIME ))
	393	{
	394	return FALSE;
	395	}
	396	m_ownsClipboard = TRUE;
	397
	398	if (!gtk_selection_owner_set( m_clipboardWidget,
	399	GDK_SELECTION_PRIMARY,
	400	GDK_CURRENT_TIME ))
	401	{
	402	return FALSE;
	403	}
	404	m_ownsPrimarySelection = TRUE;
	405
	406	return TRUE;
	407	}
	408
	409	void wxClipboard::Close()
	410	{
	411	wxCHECK_RET( m_open, "clipboard not open" );
	412
	413	m_open = FALSE;
	414	}
	415
	416	bool wxClipboard::IsSupportedFormat( wxDataFormat format, const wxString &id )
	417	{
	418	m_targetRequested = GetTargetAtom( format, id );
	419
	420	if (m_targetRequested == 0) return FALSE;
	421
	422	// add handler for target (= format) query
	423
	424	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	425	"selection_received",
	426	GTK_SIGNAL_FUNC( targets_selection_received ),
	427	(gpointer) this );
	428
	429	m_formatSupported = FALSE;
	430
	431	// perform query. this will set m_formatSupported to
	432	// TRUE if m_targetRequested is supported
	433
	434	gtk_selection_convert( m_clipboardWidget,
	435	g_clipboardAtom,
	436	g_targetsAtom,
	437	GDK_CURRENT_TIME );
	438
	439	gtk_signal_disconnect_by_func( GTK_OBJECT(m_clipboardWidget),
	440	GTK_SIGNAL_FUNC( targets_selection_received ),
	441	(gpointer) this );
	442
	443	if (!m_formatSupported) return FALSE;
	444
	445	return TRUE;
	446	}
	447
	448	bool wxClipboard::GetData( wxDataObject *data )
	449	{
	450	wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
	451
	452	m_receivedData = data;
	453
	454	wxCHECK_MSG( m_receivedData, FALSE, "invalid data object" );
	455
	456	if (m_receivedData->GetFormat() == wxDF_PRIVATE)
	457	{
	458	wxPrivateDataObject* pd = (wxPrivateDataObject*) m_receivedData;
	459
	460	wxCHECK_MSG( !pd->GetId().IsEmpty(), FALSE, "private clipboard format requires ID string" );
	461
	462	m_targetRequested = GetTargetAtom( m_receivedData->GetFormat(), pd->GetId() );
	463	}
	464	else
	465	{
	466	m_targetRequested = GetTargetAtom( m_receivedData->GetFormat() );
	467	}
	468
	469	data->m_formatAtom = m_targetRequested;
	470
	471	wxCHECK_MSG( m_targetRequested, FALSE, "unsupported clipboard format" );
	472
	473	m_formatSupported = FALSE;
	474
	475	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	476	"selection_received",
	477	GTK_SIGNAL_FUNC( selection_received ),
	478	(gpointer) this );
	479
	480	gtk_selection_convert( m_clipboardWidget,
	481	g_clipboardAtom,
	482	m_targetRequested,
	483	GDK_CURRENT_TIME );
	484
	485	gtk_signal_disconnect_by_func( GTK_OBJECT(m_clipboardWidget),
	486	GTK_SIGNAL_FUNC( selection_received ),
	487	(gpointer) this );
	488
	489	wxCHECK_MSG( m_formatSupported, FALSE, "error retrieving data from clipboard" );
	490
	491	return TRUE;
	492	}
	493
	494	GdkAtom wxClipboard::GetTargetAtom( wxDataFormat format, const wxString &id )
	495	{
	496	// What is X representation of that format?
	497
	498	switch (format)
	499	{
	500	case wxDF_TEXT:
	501	{
	502	return GDK_TARGET_STRING;
	503	// g_textAtom
	504	}
	505
	506	case wxDF_BITMAP:
	507	{
	508	return GDK_TARGET_BITMAP;
	509	break;
	510	}
	511
	512	case wxDF_PRIVATE:
	513	{
	514	// we create our own X representation
	515
	516	return gdk_atom_intern( WXSTRINGCAST( id ), FALSE );
	517	}
	518
	519	default:
	520	{
	521	return (GdkAtom) 0;
	522	}
	523	}
	524
	525	return (GdkAtom) 0;
	526	}
	527
	528	//-----------------------------------------------------------------------------
	529	// wxClipboardModule
	530	//-----------------------------------------------------------------------------
	531
	532	IMPLEMENT_DYNAMIC_CLASS(wxClipboardModule,wxModule)
	533
	534	bool wxClipboardModule::OnInit()
	535	{
	536	wxTheClipboard = new wxClipboard();
	537
	538	return TRUE;
	539	}
	540
	541	void wxClipboardModule::OnExit()
	542	{
	543	if (wxTheClipboard) delete wxTheClipboard;
	544	wxTheClipboard = (wxClipboard*) NULL;
	545	}