[wxWidgets.git] / src / gtk / 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"

#if wxUSE_CLIPBOARD

#include "glib.h"
#include "gdk/gdk.h"
#include "gtk/gtk.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++)
    {
      char *name = gdk_atom_name (atoms[i]);
      if (name) printf( "Format available: %s.\n", name );
      
        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->GetFormat().GetAtom() != 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().GetType())
    {
        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. */
      
        if (wxTheClipboard->m_dataBroker)
	{
	    delete wxTheClipboard->m_dataBroker;
	    wxTheClipboard->m_dataBroker = (wxDataBroker*) NULL;
	}
    }
  
    return TRUE;
}

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

static void
selection_handler( GtkWidget *WXUNUSED(widget), GtkSelectionData *selection_data, gpointer WXUNUSED(data) )
{
    if (!wxTheClipboard) return;
  
    if (!wxTheClipboard->m_dataBroker) return;
  
    wxNode *node = wxTheClipboard->m_dataBroker->m_dataObjects.First();
    
    while (node)
    {
        wxDataObject *data_object = (wxDataObject *)node->Data();
    
	if (data_object->GetFormat().GetAtom() != selection_data->target)
	{
	    node = node->Next();
	    break;
	}
	
	switch (data_object->GetFormat().GetType())
	{
	    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->GetSize() == 0) return;
	    
                gtk_selection_data_set( 
                    selection_data, 
		    GDK_SELECTION_TYPE_STRING, 
		    8*sizeof(gchar), 
		    (unsigned char*) private_object->GetData(), 
		    (int) private_object->GetSize() );
	    }
	    
	    default:
	      break;
        }
	
	node = node->Next();
    }
}

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

IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)

wxClipboard::wxClipboard()
{
    m_open = FALSE;

    m_ownsClipboard = FALSE;
    m_ownsPrimarySelection = FALSE;

    m_dataBroker = (wxDataBroker*) NULL;
  
    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_dataBroker)
    { 
        /*  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 );
        }
    
        if (m_dataBroker)
	{
	    delete m_dataBroker;
	    m_dataBroker = (wxDataBroker*) NULL;
	}
    }
  
    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( m_open, FALSE, "clipboard not open" );
  
    wxCHECK_MSG( data, FALSE, "data is invalid" );
  
    Clear();

    return AddData( data );
}

bool wxClipboard::AddData( wxDataObject *data )
{
    wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
  
    wxCHECK_MSG( data, FALSE, "data is invalid" );
    
    /* if clipboard has been cleared before, create new data broker */
  
    if (!m_dataBroker) m_dataBroker = new wxDataBroker();
  
    /* add new data to list of offered data objects */
  
    m_dataBroker->Add( data );
    
    /* get native format id of new data object */
    
    GdkAtom format = data->GetFormat().GetAtom();
	
    wxCHECK_MSG( format, FALSE, "data has invalid format" );
    
    /* This should happen automatically, but to be on the safe side */
      
    m_ownsClipboard = FALSE;
    m_ownsPrimarySelection = FALSE;
    
    /* Add handlers if someone requests data */
  

#if (GTK_MINOR_VERSION > 0)

    gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget), 
                              GDK_SELECTION_PRIMARY,
			      format, 
			      0 );  /* what is info ? */
			     
    gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget), 
                              g_clipboardAtom,
			      format, 
			      0 );  /* what is info ? */
			     
    gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), 
                        "selection_get",
		        GTK_SIGNAL_FUNC(selection_handler), 
		        (gpointer) NULL );

#else

    gtk_selection_add_handler( m_clipboardWidget, 
                               g_clipboardAtom,
			       format,
			       selection_handler,
			       (gpointer) NULL );
			       
    gtk_selection_add_handler( m_clipboardWidget, 
                               GDK_SELECTION_PRIMARY,
			       format,
			       selection_handler,
			       (gpointer) NULL );
#endif
			       
    /* 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::IsSupported( wxDataFormat format )
{
    wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
    
    /* store requested format to be asked for by callbacks */
    
    m_targetRequested = format.GetAtom();
  
    wxCHECK_MSG( m_targetRequested, FALSE, "invalid clipboard format" );
    
    /* 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" );
    
    /* is data supported by clipboard ? */
    
    if (!IsSupported( data->GetFormat() )) return FALSE;
    
    /* store pointer to data object to be filled up by callbacks */
    
    m_receivedData = data;
    
    /* store requested format to be asked for by callbacks */
    
    m_targetRequested = data->GetFormat().GetAtom();
  
    wxCHECK_MSG( m_targetRequested, FALSE, "invalid clipboard format" );
    
    /* start query */
    
    m_formatSupported = FALSE;
  
    gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), 
                        "selection_received",
		        GTK_SIGNAL_FUNC( selection_received ), 
		        (gpointer) this );

    /* ask for clipboard contents */

    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 );

    /* this is a true error as we checked for the presence of such data before */

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

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

IMPLEMENT_DYNAMIC_CLASS(wxClipboardModule,wxModule)

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

void wxClipboardModule::OnExit()
{
    if (wxTheClipboard) delete wxTheClipboard;
    wxTheClipboard = (wxClipboard*) NULL;
}

#endif

  // wxUSE_CLIPBOARD
Commit	Line	Data
dc86cb34 RR	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
06cfab17	16	#if wxUSE_CLIPBOARD
ac57418f	17
83624f79 RR	18	#include "glib.h"
	19	#include "gdk/gdk.h"
	20	#include "gtk/gtk.h"
	21
dc86cb34 RR	22	//-----------------------------------------------------------------------------
	23	// data
	24	//-----------------------------------------------------------------------------
	25
	26	wxClipboard wxTheClipboard = (wxClipboard) NULL;
	27
fd0eed64 RR	28	GdkAtom g_textAtom = 0;
fd0eed64 RR	29	GdkAtom g_clipboardAtom = 0;
b527aac5	30	GdkAtom g_targetsAtom = 0;
fd0eed64	31
dc86cb34	32	//-----------------------------------------------------------------------------
b527aac5	33	// reminder
dc86cb34 RR	34	//-----------------------------------------------------------------------------
dc86cb34 RR	35
b527aac5 RR	36	/* The contents of a selection are returned in a GtkSelectionData
	37	structure. selection/target identify the request.
	38	type specifies the type of the return; if length < 0, and
	39	the data should be ignored. This structure has object semantics -
	40	no fields should be modified directly, they should not be created
	41	directly, and pointers to them should not be stored beyond the duration of
	42	a callback. (If the last is changed, we'll need to add reference
	43	counting)
	44
	45	struct _GtkSelectionData
dc86cb34	46	{
b527aac5 RR	47	GdkAtom selection;
	48	GdkAtom target;
	49	GdkAtom type;
	50	gint format;
	51	guchar *data;
	52	gint length;
	53	};
	54
	55	*/
dc86cb34	56
b527aac5 RR	57	//-----------------------------------------------------------------------------
	58	// "selection_received" for targets
	59	//-----------------------------------------------------------------------------
	60
	61	static void
	62	targets_selection_received( GtkWidget *WXUNUSED(widget),
	63	GtkSelectionData *selection_data,
	64	wxClipboard *clipboard )
dc86cb34	65	{
8b53e5a2	66	if (!wxTheClipboard) return;
b527aac5	67
8b53e5a2	68	if (selection_data->length <= 0) return;
b527aac5	69
8b53e5a2 RR	70	// make sure we got the data in the correct form
8b53e5a2 RR	71	if (selection_data->type != GDK_SELECTION_TYPE_ATOM) return;
b527aac5	72
8b53e5a2 RR	73	// the atoms we received, holding a list of targets (= formats)
8b53e5a2 RR	74	GdkAtom atoms = (GdkAtom )selection_data->data;
b527aac5	75
8b53e5a2 RR	76	for (unsigned int i=0; i<selection_data->length/sizeof(GdkAtom); i++)
8b53e5a2 RR	77	{
3c1b65a4 RR	78	char *name = gdk_atom_name (atoms[i]);
	79	if (name) printf( "Format available: %s.\n", name );
	80
8b53e5a2 RR	81	if (atoms[i] == clipboard->m_targetRequested)
	82	{
	83	clipboard->m_formatSupported = TRUE;
	84	return;
	85	}
	86	}
b527aac5	87
8b53e5a2	88	return;
dc86cb34 RR	89	}
	90
	91	//-----------------------------------------------------------------------------
b527aac5	92	// "selection_received" for the actual data
dc86cb34 RR	93	//-----------------------------------------------------------------------------
dc86cb34 RR	94
fd0eed64	95	static void
b527aac5 RR	96	selection_received( GtkWidget *WXUNUSED(widget),
	97	GtkSelectionData *selection_data,
	98	wxClipboard *clipboard )
dc86cb34	99	{
8b53e5a2	100	if (!wxTheClipboard) return;
b527aac5	101
8b53e5a2 RR	102	wxDataObject *data_object = clipboard->m_receivedData;
	103
	104	if (!data_object) return;
	105
	106	if (selection_data->length <= 0) return;
b527aac5	107
8b53e5a2 RR	108	// make sure we got the data in the correct format
8b53e5a2 RR	109
0d2a2b60	110	if (data_object->GetFormat().GetAtom() != selection_data->target) return;
8b53e5a2 RR	111
	112	// make sure we got the data in the correct form (selection type).
	113	// if so, copy data to target object
	114
0d2a2b60	115	switch (data_object->GetFormat().GetType())
8b53e5a2 RR	116	{
	117	case wxDF_TEXT:
	118	{
	119	if (selection_data->type != GDK_SELECTION_TYPE_STRING) return;
	120
	121	wxTextDataObject text_object = (wxTextDataObject ) data_object;
	122
	123	wxString text = (const char*) selection_data->data;
	124
	125	text_object->SetText( text );
	126
	127	break;
	128	}
	129
	130	case wxDF_BITMAP:
	131	{
	132	if (selection_data->type != GDK_SELECTION_TYPE_BITMAP) return;
	133
	134	return;
	135
	136	break;
	137	}
	138
	139	case wxDF_PRIVATE:
	140	{
	141	if (selection_data->type != GDK_SELECTION_TYPE_STRING) return;
	142
	143	wxPrivateDataObject private_object = (wxPrivateDataObject ) data_object;
	144
	145	private_object->SetData( (const char*) selection_data->data, (size_t) selection_data->length );
	146
	147	break;
	148	}
	149
	150	default:
	151	{
	152	return;
	153	}
	154	}
	155
	156	wxTheClipboard->m_formatSupported = TRUE;
dc86cb34	157	}
fd0eed64 RR	158
	159	//-----------------------------------------------------------------------------
	160	// "selection_clear"
	161	//-----------------------------------------------------------------------------
	162
	163	static gint
aeeb6a44	164	selection_clear_clip( GtkWidget WXUNUSED(widget), GdkEventSelection event )
fd0eed64	165	{
8b53e5a2	166	if (!wxTheClipboard) return TRUE;
2830bf19	167
aeeb6a44 RR	168	if (event->selection == GDK_SELECTION_PRIMARY)
	169	{
	170	wxTheClipboard->m_ownsPrimarySelection = FALSE;
	171	}
	172	else
	173	if (event->selection == g_clipboardAtom)
	174	{
	175	wxTheClipboard->m_ownsClipboard = FALSE;
	176	}
	177	else
	178	{
	179	return FALSE;
	180	}
	181
	182	if ((!wxTheClipboard->m_ownsPrimarySelection) &&
	183	(!wxTheClipboard->m_ownsClipboard))
	184	{
0d2a2b60 RR	185	/* the clipboard is no longer in our hands. we can the clipboard data. */
	186
	187	if (wxTheClipboard->m_dataBroker)
	188	{
	189	delete wxTheClipboard->m_dataBroker;
	190	wxTheClipboard->m_dataBroker = (wxDataBroker*) NULL;
	191	}
aeeb6a44	192	}
fd0eed64	193
8b53e5a2	194	return TRUE;
fd0eed64 RR	195	}
	196
	197	//-----------------------------------------------------------------------------
	198	// selection handler for supplying data
	199	//-----------------------------------------------------------------------------
	200
	201	static void
	202	selection_handler( GtkWidget WXUNUSED(widget), GtkSelectionData selection_data, gpointer WXUNUSED(data) )
	203	{
8b53e5a2	204	if (!wxTheClipboard) return;
fd0eed64	205
0d2a2b60 RR	206	if (!wxTheClipboard->m_dataBroker) return;
	207
	208	wxNode *node = wxTheClipboard->m_dataBroker->m_dataObjects.First();
8b53e5a2 RR	209
	210	while (node)
	211	{
	212	wxDataObject data_object = (wxDataObject )node->Data();
	213
0d2a2b60	214	if (data_object->GetFormat().GetAtom() != selection_data->target)
8b53e5a2 RR	215	{
	216	node = node->Next();
	217	break;
	218	}
	219
0d2a2b60	220	switch (data_object->GetFormat().GetType())
8b53e5a2 RR	221	{
	222	case wxDF_TEXT:
	223	{
	224	wxTextDataObject text_object = (wxTextDataObject) data_object;
	225
	226	wxString text = text_object->GetText();
	227
	228	char *s = WXSTRINGCAST text;
	229	int len = (int) text.Length();
	230
	231	gtk_selection_data_set(
	232	selection_data,
	233	GDK_SELECTION_TYPE_STRING,
	234	8*sizeof(gchar),
	235	(unsigned char*) s,
	236	len );
	237
	238	break;
	239	}
	240
	241	case wxDF_BITMAP:
	242	{
	243	// wxBitmapDataObject private_object = (wxBitmapDataObject) data_object;
	244
	245	// how do we do that ?
	246
	247	break;
	248	}
	249
	250	case wxDF_PRIVATE:
	251	{
	252	wxPrivateDataObject private_object = (wxPrivateDataObject) data_object;
	253
0d2a2b60	254	if (private_object->GetSize() == 0) return;
8b53e5a2 RR	255
	256	gtk_selection_data_set(
	257	selection_data,
	258	GDK_SELECTION_TYPE_STRING,
	259	8*sizeof(gchar),
	260	(unsigned char*) private_object->GetData(),
0d2a2b60	261	(int) private_object->GetSize() );
8b53e5a2 RR	262	}
	263
	264	default:
	265	break;
	266	}
	267
	268	node = node->Next();
	269	}
fd0eed64	270	}
dc86cb34 RR	271
	272	//-----------------------------------------------------------------------------
	273	// wxClipboard
	274	//-----------------------------------------------------------------------------
	275
	276	IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
	277
	278	wxClipboard::wxClipboard()
	279	{
8b53e5a2 RR	280	m_open = FALSE;
8b53e5a2 RR	281
aeeb6a44 RR	282	m_ownsClipboard = FALSE;
	283	m_ownsPrimarySelection = FALSE;
	284
0d2a2b60	285	m_dataBroker = (wxDataBroker*) NULL;
fd0eed64	286
8b53e5a2	287	m_receivedData = (wxDataObject*) NULL;
99c67c77	288
8b53e5a2 RR	289	m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
	290	gtk_widget_realize( m_clipboardWidget );
	291
	292	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	293	"selection_clear_event",
aeeb6a44	294	GTK_SIGNAL_FUNC( selection_clear_clip ),
8b53e5a2	295	(gpointer) NULL );
fd0eed64	296
8b53e5a2 RR	297	if (!g_clipboardAtom) g_clipboardAtom = gdk_atom_intern( "CLIPBOARD", FALSE );
	298	if (!g_textAtom) g_textAtom = gdk_atom_intern( "TEXT", FALSE );
	299	if (!g_targetsAtom) g_targetsAtom = gdk_atom_intern ("TARGETS", FALSE);
	300
	301	m_formatSupported = FALSE;
	302	m_targetRequested = 0;
dc86cb34 RR	303	}
	304
	305	wxClipboard::~wxClipboard()
b527aac5	306	{
8b53e5a2	307	Clear();
b527aac5	308
8b53e5a2	309	if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
b527aac5 RR	310	}
	311
	312	void wxClipboard::Clear()
dc86cb34	313	{
0d2a2b60	314	if (m_dataBroker)
8b53e5a2 RR	315	{
	316	/* As we have data we also own the clipboard. Once we no longer own
	317	it, clear_selection is called which will set m_data to zero */
fd0eed64	318
aeeb6a44	319	if (gdk_selection_owner_get( g_clipboardAtom ) == m_clipboardWidget->window)
8b53e5a2 RR	320	{
	321	gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom, GDK_CURRENT_TIME );
	322	}
db1b4961	323
aeeb6a44 RR	324	if (gdk_selection_owner_get( GDK_SELECTION_PRIMARY ) == m_clipboardWidget->window)
	325	{
	326	gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY, GDK_CURRENT_TIME );
	327	}
	328
0d2a2b60 RR	329	if (m_dataBroker)
	330	{
	331	delete m_dataBroker;
	332	m_dataBroker = (wxDataBroker*) NULL;
	333	}
8b53e5a2	334	}
b527aac5	335
8b53e5a2	336	m_targetRequested = 0;
b527aac5	337
8b53e5a2 RR	338	m_formatSupported = FALSE;
	339	}
	340
	341	bool wxClipboard::Open()
	342	{
	343	wxCHECK_MSG( !m_open, FALSE, "clipboard already open" );
b527aac5	344
8b53e5a2	345	m_open = TRUE;
b527aac5	346
8b53e5a2	347	return TRUE;
dc86cb34 RR	348	}
dc86cb34 RR	349
75ce0581	350	bool wxClipboard::SetData( wxDataObject *data )
dc86cb34	351	{
75ce0581 RR	352	wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
75ce0581 RR	353
8b53e5a2	354	wxCHECK_MSG( data, FALSE, "data is invalid" );
db1b4961	355
0d2a2b60	356	Clear();
75ce0581 RR	357
	358	return AddData( data );
	359	}
	360
	361	bool wxClipboard::AddData( wxDataObject *data )
	362	{
	363	wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
0d2a2b60	364
75ce0581	365	wxCHECK_MSG( data, FALSE, "data is invalid" );
2830bf19	366
75ce0581	367	/* if clipboard has been cleared before, create new data broker */
8b53e5a2	368
75ce0581	369	if (!m_dataBroker) m_dataBroker = new wxDataBroker();
8b53e5a2	370
75ce0581 RR	371	/* add new data to list of offered data objects */
	372
	373	m_dataBroker->Add( data );
	374
	375	/* get native format id of new data object */
	376
	377	GdkAtom format = data->GetFormat().GetAtom();
8b53e5a2	378
75ce0581 RR	379	wxCHECK_MSG( format, FALSE, "data has invalid format" );
	380
	381	/* This should happen automatically, but to be on the safe side */
8b53e5a2	382
75ce0581 RR	383	m_ownsClipboard = FALSE;
75ce0581 RR	384	m_ownsPrimarySelection = FALSE;
aeeb6a44	385
75ce0581	386	/* Add handlers if someone requests data */
8b53e5a2	387
d345e841 RR	388
	389	#if (GTK_MINOR_VERSION > 0)
	390
	391	gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget),
	392	GDK_SELECTION_PRIMARY,
	393	format,
	394	0 ); /* what is info ? */
	395
	396	gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget),
	397	g_clipboardAtom,
	398	format,
	399	0 ); /* what is info ? */
	400
	401	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	402	"selection_get",
	403	GTK_SIGNAL_FUNC(selection_handler),
	404	(gpointer) NULL );
	405
	406	#else
	407
75ce0581	408	gtk_selection_add_handler( m_clipboardWidget,
8b53e5a2	409	g_clipboardAtom,
0d2a2b60	410	format,
8b53e5a2	411	selection_handler,
0d2a2b60	412	(gpointer) NULL );
8b53e5a2	413
75ce0581	414	gtk_selection_add_handler( m_clipboardWidget,
aeeb6a44	415	GDK_SELECTION_PRIMARY,
0d2a2b60	416	format,
aeeb6a44	417	selection_handler,
0d2a2b60	418	(gpointer) NULL );
d345e841	419	#endif
aeeb6a44	420
75ce0581	421	/* Tell the world we offer clipboard data */
8b53e5a2	422
75ce0581	423	if (!gtk_selection_owner_set( m_clipboardWidget,
8b53e5a2 RR	424	g_clipboardAtom,
8b53e5a2 RR	425	GDK_CURRENT_TIME ))
75ce0581 RR	426	{
	427	return FALSE;
	428	}
	429	m_ownsClipboard = TRUE;
aeeb6a44	430
75ce0581	431	if (!gtk_selection_owner_set( m_clipboardWidget,
aeeb6a44 RR	432	GDK_SELECTION_PRIMARY,
aeeb6a44 RR	433	GDK_CURRENT_TIME ))
75ce0581 RR	434	{
75ce0581 RR	435	return FALSE;
aeeb6a44	436	}
75ce0581 RR	437	m_ownsPrimarySelection = TRUE;
75ce0581 RR	438
8b53e5a2 RR	439	return TRUE;
8b53e5a2 RR	440	}
db1b4961	441
8b53e5a2 RR	442	void wxClipboard::Close()
	443	{
	444	wxCHECK_RET( m_open, "clipboard not open" );
	445
	446	m_open = FALSE;
dc86cb34 RR	447	}
dc86cb34 RR	448
5f699c22	449	bool wxClipboard::IsSupported( wxDataFormat format )
b527aac5	450	{
0d2a2b60 RR	451	wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
0d2a2b60 RR	452
75ce0581	453	/* store requested format to be asked for by callbacks */
0d2a2b60	454
5f699c22	455	m_targetRequested = format.GetAtom();
b527aac5	456
0d2a2b60 RR	457	wxCHECK_MSG( m_targetRequested, FALSE, "invalid clipboard format" );
0d2a2b60 RR	458
0d2a2b60	459	/* add handler for target (= format) query */
b527aac5	460
8b53e5a2 RR	461	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	462	"selection_received",
	463	GTK_SIGNAL_FUNC( targets_selection_received ),
	464	(gpointer) this );
b527aac5	465
8b53e5a2	466	m_formatSupported = FALSE;
b527aac5	467
0d2a2b60 RR	468	/* perform query. this will set m_formatSupported to
0d2a2b60 RR	469	* TRUE if m_targetRequested is supported */
8b53e5a2 RR	470
	471	gtk_selection_convert( m_clipboardWidget,
	472	g_clipboardAtom,
	473	g_targetsAtom,
	474	GDK_CURRENT_TIME );
b527aac5	475
8b53e5a2 RR	476	gtk_signal_disconnect_by_func( GTK_OBJECT(m_clipboardWidget),
	477	GTK_SIGNAL_FUNC( targets_selection_received ),
	478	(gpointer) this );
b527aac5	479
8b53e5a2	480	if (!m_formatSupported) return FALSE;
75ce0581 RR	481
	482	return TRUE;
	483	}
	484
5f699c22	485	bool wxClipboard::GetData( wxDataObject *data )
75ce0581 RR	486	{
	487	wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
	488
	489	/* is data supported by clipboard ? */
	490
5f699c22	491	if (!IsSupported( data->GetFormat() )) return FALSE;
75ce0581 RR	492
	493	/* store pointer to data object to be filled up by callbacks */
	494
5f699c22	495	m_receivedData = data;
75ce0581 RR	496
	497	/* store requested format to be asked for by callbacks */
	498
5f699c22	499	m_targetRequested = data->GetFormat().GetAtom();
b527aac5	500
75ce0581 RR	501	wxCHECK_MSG( m_targetRequested, FALSE, "invalid clipboard format" );
	502
	503	/* start query */
8b53e5a2	504
8b53e5a2	505	m_formatSupported = FALSE;
b527aac5	506
8b53e5a2 RR	507	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	508	"selection_received",
	509	GTK_SIGNAL_FUNC( selection_received ),
	510	(gpointer) this );
b527aac5	511
75ce0581 RR	512	/* ask for clipboard contents */
75ce0581 RR	513
8b53e5a2 RR	514	gtk_selection_convert( m_clipboardWidget,
	515	g_clipboardAtom,
	516	m_targetRequested,
	517	GDK_CURRENT_TIME );
b527aac5	518
8b53e5a2 RR	519	gtk_signal_disconnect_by_func( GTK_OBJECT(m_clipboardWidget),
	520	GTK_SIGNAL_FUNC( selection_received ),
	521	(gpointer) this );
b527aac5	522
0d2a2b60 RR	523	/* this is a true error as we checked for the presence of such data before */
0d2a2b60 RR	524
8b53e5a2 RR	525	wxCHECK_MSG( m_formatSupported, FALSE, "error retrieving data from clipboard" );
	526
	527	return TRUE;
b527aac5 RR	528	}
b527aac5 RR	529
b527aac5 RR	530	//-----------------------------------------------------------------------------
	531	// wxClipboardModule
	532	//-----------------------------------------------------------------------------
	533
	534	IMPLEMENT_DYNAMIC_CLASS(wxClipboardModule,wxModule)
	535
	536	bool wxClipboardModule::OnInit()
	537	{
8b53e5a2	538	wxTheClipboard = new wxClipboard();
b527aac5	539
8b53e5a2	540	return TRUE;
b527aac5 RR	541	}
	542
	543	void wxClipboardModule::OnExit()
dc86cb34	544	{
8b53e5a2 RR	545	if (wxTheClipboard) delete wxTheClipboard;
8b53e5a2 RR	546	wxTheClipboard = (wxClipboard*) NULL;
dc86cb34	547	}
ac57418f RR	548
	549	#endif
	550
	551	// wxUSE_CLIPBOARD
	552