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