[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 "wx/utils.h"

#include "glib.h"
#include "gdk/gdk.h"
#include "gtk/gtk.h"

//-----------------------------------------------------------------------------
// thread system
//-----------------------------------------------------------------------------

#if wxUSE_THREADS
extern void wxapp_install_thread_wakeup();
extern void wxapp_uninstall_thread_wakeup();
#endif

//-----------------------------------------------------------------------------
// 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, 
#if (GTK_MINOR_VERSION > 0)
                            guint32 WXUNUSED(time),
#endif
		            wxClipboard *clipboard )
{
    if (!wxTheClipboard)
    {
        clipboard->m_waiting = FALSE;
        return;
    }
  
    if (selection_data->length <= 0)
    {
        clipboard->m_waiting = FALSE;
        return;
    }
    
    /* make sure we got the data in the correct form */
    if (selection_data->type != GDK_SELECTION_TYPE_ATOM)
    {
        clipboard->m_waiting = FALSE;
        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_waiting = FALSE;
            clipboard->m_formatSupported = TRUE;
            return;
        }
    }

    clipboard->m_waiting = FALSE;
    return;
}

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

static void 
selection_received( GtkWidget *WXUNUSED(widget), 
                    GtkSelectionData *selection_data, 
#if (GTK_MINOR_VERSION > 0)
                    guint32 WXUNUSED(time),
#endif
		    wxClipboard *clipboard )
{
    if (!wxTheClipboard)
    {
        clipboard->m_waiting = FALSE;
        return;
    }
  
    wxDataObject *data_object = clipboard->m_receivedData;
    
    if (!data_object)
    {
        clipboard->m_waiting = FALSE;
        return;
    }
    
    if (selection_data->length <= 0)
    {
        clipboard->m_waiting = FALSE;
        return;
    }
  
    /* make sure we got the data in the correct format */
    if (data_object->GetFormat().GetAtom() != selection_data->target)
    {
        clipboard->m_waiting = FALSE;
        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)
            {
                clipboard->m_waiting = FALSE;
                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)
            {
                clipboard->m_waiting = FALSE;
                return;
            }
	    
	    break;
	}
	
	case wxDF_PRIVATE:
	{
            if (selection_data->type != GDK_SELECTION_TYPE_STRING)
            {
                clipboard->m_waiting = FALSE;
                return;
            }
	    
	    wxPrivateDataObject *private_object = (wxPrivateDataObject *) data_object;
	    
	    private_object->SetData( (const char*) selection_data->data, (size_t) selection_data->length );
	    
	    break;
	}
	
	default:
	{
            clipboard->m_waiting = FALSE;
	    return;
	}
    }
    
    wxTheClipboard->m_formatSupported = TRUE;
    clipboard->m_waiting = FALSE;
}

//-----------------------------------------------------------------------------
// "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
    {
        wxTheClipboard->m_waiting = FALSE;
        return FALSE;
    }
    
    if ((!wxTheClipboard->m_ownsPrimarySelection) &&
        (!wxTheClipboard->m_ownsClipboard))
    {
        /* the clipboard is no longer in our hands. we can the delete clipboard data. */
        if (wxTheClipboard->m_dataBroker)
	{
	    delete wxTheClipboard->m_dataBroker;
	    wxTheClipboard->m_dataBroker = (wxDataBroker*) NULL;
	}
    }
  
    wxTheClipboard->m_waiting = FALSE;
    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();
	    continue;
	}
	
	switch (data_object->GetFormat().GetType())
	{
	    case wxDF_TEXT:
	    {
	        wxTextDataObject *text_object = (wxTextDataObject*) data_object;
	    
	        wxString text = text_object->GetText();
	    
#if wxUSE_UNICODE
		const wxWX2MBbuf s = text.mbc_str();
		int len = strlen(s);
#else // more efficient in non-Unicode
		const char *s = text.c_str();
		int len = (int) text.Length();
#endif
		
                gtk_selection_data_set( 
                    selection_data, 
		    GDK_SELECTION_TYPE_STRING, 
		    8*sizeof(gchar),
		    (unsigned char*) (const 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;

    /* we use m_targetsWidget to query what formats are available */
    
    m_targetsWidget = gtk_window_new( GTK_WINDOW_POPUP );
    gtk_widget_realize( m_targetsWidget );

    gtk_signal_connect( GTK_OBJECT(m_targetsWidget), 
                        "selection_received",
		        GTK_SIGNAL_FUNC( targets_selection_received ), 
		        (gpointer) this );
			
    /* we use m_clipboardWidget to get and to offer data */
    
    m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
    gtk_widget_realize( m_clipboardWidget );

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

    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;
    
    m_usePrimary = FALSE;
}

wxClipboard::~wxClipboard()
{
    Clear();  
  
    if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
    if (m_targetsWidget) gtk_widget_destroy( m_targetsWidget );
}

void wxClipboard::Clear()
{
    if (m_dataBroker)
    { 
#if wxUSE_THREADS
        /* disable GUI threads */
        wxapp_uninstall_thread_wakeup();
#endif
    
        /*  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)
        {
            m_waiting = TRUE;
	    
            gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom, GDK_CURRENT_TIME );
	    
            while (m_waiting) gtk_main_iteration();
        }
    
        if (gdk_selection_owner_get( GDK_SELECTION_PRIMARY ) == m_clipboardWidget->window)
        {
            m_waiting = TRUE;
	    
            gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY, GDK_CURRENT_TIME );
	    
            while (m_waiting) gtk_main_iteration();
        }
    
        if (m_dataBroker)
	{
	    delete m_dataBroker;
	    m_dataBroker = (wxDataBroker*) NULL;
	}
	
#if wxUSE_THREADS
        /* re-enable GUI threads */
        wxapp_install_thread_wakeup();
#endif
    }
  
    m_targetRequested = 0;
  
    m_formatSupported = FALSE;
}

bool wxClipboard::Open()
{
    wxCHECK_MSG( !m_open, FALSE, _T("clipboard already open") );
  
    m_open = TRUE;
    
    return TRUE;
}

bool wxClipboard::SetData( wxDataObject *data )
{
    wxCHECK_MSG( m_open, FALSE, _T("clipboard not open") );
  
    wxCHECK_MSG( data, FALSE, _T("data is invalid") );
  
    Clear();

    return AddData( data );
}

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

#if wxUSE_THREADS
        /* disable GUI threads */
        wxapp_uninstall_thread_wakeup();
#endif
    
    /* Tell the world we offer clipboard data */
    if (!gtk_selection_owner_set( m_clipboardWidget, 
                                  g_clipboardAtom,
				  GDK_CURRENT_TIME ))
    {
#if wxUSE_THREADS
        /* re-enable GUI threads */
        wxapp_install_thread_wakeup();
#endif
        return FALSE;
    }
    m_ownsClipboard = TRUE;
    
    if (!gtk_selection_owner_set( m_clipboardWidget, 
                                  GDK_SELECTION_PRIMARY,
				  GDK_CURRENT_TIME ))
    {  
#if wxUSE_THREADS
        /* re-enable GUI threads */
        wxapp_install_thread_wakeup();
#endif
        return FALSE;
    }
    m_ownsPrimarySelection = TRUE;
    
#if wxUSE_THREADS
    /* re-enable GUI threads */
    wxapp_install_thread_wakeup();
#endif
	
    return TRUE;
}

void wxClipboard::Close()
{
    wxCHECK_RET( m_open, _T("clipboard not open") );
    
    m_open = FALSE;
}

bool wxClipboard::IsSupported( wxDataFormat format )
{
    wxCHECK_MSG( m_open, FALSE, _T("clipboard not open") );
    
    /* store requested format to be asked for by callbacks */
    
    m_targetRequested = format.GetAtom();
  
    wxCHECK_MSG( m_targetRequested, FALSE, _T("invalid clipboard format") );
    
    m_formatSupported = FALSE;
  
    /* perform query. this will set m_formatSupported to 
       TRUE if m_targetRequested is supported.
       alsom we have to wait for the "answer" from the 
       clipboard owner which is an asynchronous process.
       therefore we set m_waiting = TRUE here and wait
       until the callback "targets_selection_received" 
       sets it to FALSE */

    m_waiting = TRUE;

    gtk_selection_convert( m_targetsWidget,
			   m_usePrimary?GDK_SELECTION_PRIMARY:g_clipboardAtom, 
			   g_targetsAtom,
			   GDK_CURRENT_TIME );

    while (m_waiting) gtk_main_iteration();
    
    if (!m_formatSupported) return FALSE;
    
    return TRUE;
}    
    
bool wxClipboard::GetData( wxDataObject *data )
{
    wxCHECK_MSG( m_open, FALSE, _T("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, _T("invalid clipboard format") );
    
    /* start query */
    
    m_formatSupported = FALSE;
  
    /* ask for clipboard contents.  this will set 
       m_formatSupported to TRUE if m_targetRequested 
       is supported.
       also, we have to wait for the "answer" from the 
       clipboard owner which is an asynchronous process.
       therefore we set m_waiting = TRUE here and wait
       until the callback "targets_selection_received" 
       sets it to FALSE */

    m_waiting = TRUE;

    gtk_selection_convert( m_clipboardWidget,
			   m_usePrimary?GDK_SELECTION_PRIMARY:g_clipboardAtom, 
			   m_targetRequested,
			   GDK_CURRENT_TIME );
  
    while (m_waiting) gtk_main_iteration();

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

    wxCHECK_MSG( m_formatSupported, FALSE, _T("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
034be888 RR	18	#include "wx/utils.h"
034be888 RR	19
83624f79 RR	20	#include "glib.h"
	21	#include "gdk/gdk.h"
	22	#include "gtk/gtk.h"
	23
b453e1b2 RR	24	//-----------------------------------------------------------------------------
	25	// thread system
	26	//-----------------------------------------------------------------------------
	27
	28	#if wxUSE_THREADS
	29	extern void wxapp_install_thread_wakeup();
	30	extern void wxapp_uninstall_thread_wakeup();
	31	#endif
	32
dc86cb34 RR	33	//-----------------------------------------------------------------------------
	34	// data
	35	//-----------------------------------------------------------------------------
	36
	37	wxClipboard wxTheClipboard = (wxClipboard) NULL;
	38
fd0eed64	39	GdkAtom g_clipboardAtom = 0;
b527aac5	40	GdkAtom g_targetsAtom = 0;
fd0eed64	41
dc86cb34	42	//-----------------------------------------------------------------------------
b527aac5	43	// reminder
dc86cb34 RR	44	//-----------------------------------------------------------------------------
dc86cb34 RR	45
b527aac5 RR	46	/* The contents of a selection are returned in a GtkSelectionData
	47	structure. selection/target identify the request.
	48	type specifies the type of the return; if length < 0, and
	49	the data should be ignored. This structure has object semantics -
	50	no fields should be modified directly, they should not be created
	51	directly, and pointers to them should not be stored beyond the duration of
	52	a callback. (If the last is changed, we'll need to add reference
	53	counting)
	54
	55	struct _GtkSelectionData
dc86cb34	56	{
b527aac5 RR	57	GdkAtom selection;
	58	GdkAtom target;
	59	GdkAtom type;
	60	gint format;
	61	guchar *data;
	62	gint length;
	63	};
	64
	65	*/
dc86cb34	66
b527aac5 RR	67	//-----------------------------------------------------------------------------
	68	// "selection_received" for targets
	69	//-----------------------------------------------------------------------------
	70
	71	static void
	72	targets_selection_received( GtkWidget *WXUNUSED(widget),
	73	GtkSelectionData *selection_data,
034be888 RR	74	#if (GTK_MINOR_VERSION > 0)
	75	guint32 WXUNUSED(time),
	76	#endif
b527aac5	77	wxClipboard *clipboard )
dc86cb34	78	{
034be888 RR	79	if (!wxTheClipboard)
	80	{
	81	clipboard->m_waiting = FALSE;
	82	return;
	83	}
b527aac5	84
034be888 RR	85	if (selection_data->length <= 0)
	86	{
	87	clipboard->m_waiting = FALSE;
	88	return;
	89	}
	90
	91	/* make sure we got the data in the correct form */
	92	if (selection_data->type != GDK_SELECTION_TYPE_ATOM)
	93	{
	94	clipboard->m_waiting = FALSE;
	95	return;
	96	}
b527aac5	97
8b53e5a2 RR	98	// the atoms we received, holding a list of targets (= formats)
8b53e5a2 RR	99	GdkAtom atoms = (GdkAtom )selection_data->data;
b527aac5	100
8b53e5a2 RR	101	for (unsigned int i=0; i<selection_data->length/sizeof(GdkAtom); i++)
8b53e5a2 RR	102	{
7e2c43b8	103	/* char *name = gdk_atom_name (atoms[i]);
ca35e608	104	if (name) printf( "Format available: %s.\n", name ); */
3c1b65a4	105
8b53e5a2 RR	106	if (atoms[i] == clipboard->m_targetRequested)
8b53e5a2 RR	107	{
034be888	108	clipboard->m_waiting = FALSE;
8b53e5a2 RR	109	clipboard->m_formatSupported = TRUE;
	110	return;
	111	}
	112	}
b527aac5	113
034be888	114	clipboard->m_waiting = FALSE;
8b53e5a2	115	return;
dc86cb34 RR	116	}
	117
	118	//-----------------------------------------------------------------------------
b527aac5	119	// "selection_received" for the actual data
dc86cb34 RR	120	//-----------------------------------------------------------------------------
dc86cb34 RR	121
fd0eed64	122	static void
b527aac5 RR	123	selection_received( GtkWidget *WXUNUSED(widget),
b527aac5 RR	124	GtkSelectionData *selection_data,
034be888 RR	125	#if (GTK_MINOR_VERSION > 0)
	126	guint32 WXUNUSED(time),
	127	#endif
b527aac5	128	wxClipboard *clipboard )
dc86cb34	129	{
034be888 RR	130	if (!wxTheClipboard)
	131	{
	132	clipboard->m_waiting = FALSE;
	133	return;
	134	}
b527aac5	135
8b53e5a2 RR	136	wxDataObject *data_object = clipboard->m_receivedData;
8b53e5a2 RR	137
034be888 RR	138	if (!data_object)
	139	{
	140	clipboard->m_waiting = FALSE;
	141	return;
	142	}
8b53e5a2	143
034be888 RR	144	if (selection_data->length <= 0)
	145	{
	146	clipboard->m_waiting = FALSE;
	147	return;
	148	}
b527aac5	149
034be888 RR	150	/* make sure we got the data in the correct format */
	151	if (data_object->GetFormat().GetAtom() != selection_data->target)
	152	{
	153	clipboard->m_waiting = FALSE;
	154	return;
	155	}
8b53e5a2	156
034be888 RR	157	/* make sure we got the data in the correct form (selection type).
034be888 RR	158	if so, copy data to target object */
8b53e5a2	159
0d2a2b60	160	switch (data_object->GetFormat().GetType())
8b53e5a2 RR	161	{
	162	case wxDF_TEXT:
	163	{
034be888 RR	164	if (selection_data->type != GDK_SELECTION_TYPE_STRING)
	165	{
	166	clipboard->m_waiting = FALSE;
	167	return;
	168	}
8b53e5a2 RR	169
	170	wxTextDataObject text_object = (wxTextDataObject ) data_object;
	171
	172	wxString text = (const char*) selection_data->data;
	173
	174	text_object->SetText( text );
	175
	176	break;
	177	}
	178
	179	case wxDF_BITMAP:
	180	{
034be888 RR	181	if (selection_data->type != GDK_SELECTION_TYPE_BITMAP)
	182	{
	183	clipboard->m_waiting = FALSE;
	184	return;
	185	}
8b53e5a2 RR	186
	187	break;
	188	}
	189
	190	case wxDF_PRIVATE:
	191	{
034be888 RR	192	if (selection_data->type != GDK_SELECTION_TYPE_STRING)
	193	{
	194	clipboard->m_waiting = FALSE;
	195	return;
	196	}
8b53e5a2 RR	197
	198	wxPrivateDataObject private_object = (wxPrivateDataObject ) data_object;
	199
	200	private_object->SetData( (const char*) selection_data->data, (size_t) selection_data->length );
	201
	202	break;
	203	}
	204
	205	default:
	206	{
034be888	207	clipboard->m_waiting = FALSE;
8b53e5a2 RR	208	return;
	209	}
	210	}
	211
	212	wxTheClipboard->m_formatSupported = TRUE;
034be888	213	clipboard->m_waiting = FALSE;
dc86cb34	214	}
fd0eed64 RR	215
	216	//-----------------------------------------------------------------------------
	217	// "selection_clear"
	218	//-----------------------------------------------------------------------------
	219
	220	static gint
aeeb6a44	221	selection_clear_clip( GtkWidget WXUNUSED(widget), GdkEventSelection event )
fd0eed64	222	{
8b53e5a2	223	if (!wxTheClipboard) return TRUE;
2830bf19	224
aeeb6a44 RR	225	if (event->selection == GDK_SELECTION_PRIMARY)
	226	{
	227	wxTheClipboard->m_ownsPrimarySelection = FALSE;
	228	}
	229	else
	230	if (event->selection == g_clipboardAtom)
	231	{
	232	wxTheClipboard->m_ownsClipboard = FALSE;
	233	}
	234	else
	235	{
e5ea3f7a	236	wxTheClipboard->m_waiting = FALSE;
aeeb6a44 RR	237	return FALSE;
	238	}
	239
	240	if ((!wxTheClipboard->m_ownsPrimarySelection) &&
	241	(!wxTheClipboard->m_ownsClipboard))
	242	{
db2d879a	243	/* the clipboard is no longer in our hands. we can the delete clipboard data. */
0d2a2b60 RR	244	if (wxTheClipboard->m_dataBroker)
	245	{
	246	delete wxTheClipboard->m_dataBroker;
	247	wxTheClipboard->m_dataBroker = (wxDataBroker*) NULL;
	248	}
aeeb6a44	249	}
fd0eed64	250
e5ea3f7a	251	wxTheClipboard->m_waiting = FALSE;
8b53e5a2	252	return TRUE;
fd0eed64 RR	253	}
	254
	255	//-----------------------------------------------------------------------------
	256	// selection handler for supplying data
	257	//-----------------------------------------------------------------------------
	258
	259	static void
	260	selection_handler( GtkWidget WXUNUSED(widget), GtkSelectionData selection_data, gpointer WXUNUSED(data) )
	261	{
8b53e5a2	262	if (!wxTheClipboard) return;
fd0eed64	263
0d2a2b60 RR	264	if (!wxTheClipboard->m_dataBroker) return;
	265
	266	wxNode *node = wxTheClipboard->m_dataBroker->m_dataObjects.First();
8b53e5a2 RR	267
	268	while (node)
	269	{
	270	wxDataObject data_object = (wxDataObject )node->Data();
	271
0d2a2b60	272	if (data_object->GetFormat().GetAtom() != selection_data->target)
8b53e5a2 RR	273	{
8b53e5a2 RR	274	node = node->Next();
3874d10d	275	continue;
8b53e5a2 RR	276	}
8b53e5a2 RR	277
0d2a2b60	278	switch (data_object->GetFormat().GetType())
8b53e5a2 RR	279	{
	280	case wxDF_TEXT:
	281	{
	282	wxTextDataObject text_object = (wxTextDataObject) data_object;
	283
	284	wxString text = text_object->GetText();
	285
93c5dd39 OK	286	#if wxUSE_UNICODE
	287	const wxWX2MBbuf s = text.mbc_str();
	288	int len = strlen(s);
	289	#else // more efficient in non-Unicode
	290	const char *s = text.c_str();
8b53e5a2	291	int len = (int) text.Length();
93c5dd39	292	#endif
8b53e5a2 RR	293
	294	gtk_selection_data_set(
	295	selection_data,
	296	GDK_SELECTION_TYPE_STRING,
	297	8*sizeof(gchar),
93c5dd39	298	(unsigned char) (const char) s,
8b53e5a2 RR	299	len );
	300
	301	break;
	302	}
	303
	304	case wxDF_BITMAP:
	305	{
	306	// wxBitmapDataObject private_object = (wxBitmapDataObject) data_object;
	307
	308	// how do we do that ?
	309
	310	break;
	311	}
	312
	313	case wxDF_PRIVATE:
	314	{
	315	wxPrivateDataObject private_object = (wxPrivateDataObject) data_object;
	316
0d2a2b60	317	if (private_object->GetSize() == 0) return;
8b53e5a2 RR	318
	319	gtk_selection_data_set(
	320	selection_data,
	321	GDK_SELECTION_TYPE_STRING,
	322	8*sizeof(gchar),
	323	(unsigned char*) private_object->GetData(),
0d2a2b60	324	(int) private_object->GetSize() );
8b53e5a2 RR	325	}
	326
	327	default:
	328	break;
	329	}
	330
	331	node = node->Next();
	332	}
fd0eed64	333	}
dc86cb34 RR	334
	335	//-----------------------------------------------------------------------------
	336	// wxClipboard
	337	//-----------------------------------------------------------------------------
	338
	339	IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
	340
	341	wxClipboard::wxClipboard()
	342	{
8b53e5a2 RR	343	m_open = FALSE;
8b53e5a2 RR	344
aeeb6a44 RR	345	m_ownsClipboard = FALSE;
	346	m_ownsPrimarySelection = FALSE;
	347
0d2a2b60	348	m_dataBroker = (wxDataBroker*) NULL;
fd0eed64	349
8b53e5a2	350	m_receivedData = (wxDataObject*) NULL;
99c67c77	351
034be888 RR	352	/* we use m_targetsWidget to query what formats are available */
	353
	354	m_targetsWidget = gtk_window_new( GTK_WINDOW_POPUP );
	355	gtk_widget_realize( m_targetsWidget );
	356
	357	gtk_signal_connect( GTK_OBJECT(m_targetsWidget),
	358	"selection_received",
	359	GTK_SIGNAL_FUNC( targets_selection_received ),
	360	(gpointer) this );
	361
	362	/* we use m_clipboardWidget to get and to offer data */
	363
8b53e5a2 RR	364	m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
	365	gtk_widget_realize( m_clipboardWidget );
	366
034be888 RR	367	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	368	"selection_received",
	369	GTK_SIGNAL_FUNC( selection_received ),
	370	(gpointer) this );
	371
8b53e5a2 RR	372	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
8b53e5a2 RR	373	"selection_clear_event",
aeeb6a44	374	GTK_SIGNAL_FUNC( selection_clear_clip ),
8b53e5a2	375	(gpointer) NULL );
fd0eed64	376
8b53e5a2	377	if (!g_clipboardAtom) g_clipboardAtom = gdk_atom_intern( "CLIPBOARD", FALSE );
8b53e5a2 RR	378	if (!g_targetsAtom) g_targetsAtom = gdk_atom_intern ("TARGETS", FALSE);
	379
	380	m_formatSupported = FALSE;
	381	m_targetRequested = 0;
7e2c43b8 RR	382
7e2c43b8 RR	383	m_usePrimary = FALSE;
dc86cb34 RR	384	}
	385
	386	wxClipboard::~wxClipboard()
b527aac5	387	{
8b53e5a2	388	Clear();
b527aac5	389
8b53e5a2	390	if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
034be888	391	if (m_targetsWidget) gtk_widget_destroy( m_targetsWidget );
b527aac5 RR	392	}
	393
	394	void wxClipboard::Clear()
dc86cb34	395	{
0d2a2b60	396	if (m_dataBroker)
8b53e5a2	397	{
b453e1b2 RR	398	#if wxUSE_THREADS
	399	/* disable GUI threads */
	400	wxapp_uninstall_thread_wakeup();
	401	#endif
	402
8b53e5a2 RR	403	/* As we have data we also own the clipboard. Once we no longer own
8b53e5a2 RR	404	it, clear_selection is called which will set m_data to zero */
aeeb6a44	405	if (gdk_selection_owner_get( g_clipboardAtom ) == m_clipboardWidget->window)
8b53e5a2	406	{
e5ea3f7a RR	407	m_waiting = TRUE;
e5ea3f7a RR	408
8b53e5a2	409	gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom, GDK_CURRENT_TIME );
e5ea3f7a RR	410
e5ea3f7a RR	411	while (m_waiting) gtk_main_iteration();
8b53e5a2	412	}
db1b4961	413
aeeb6a44 RR	414	if (gdk_selection_owner_get( GDK_SELECTION_PRIMARY ) == m_clipboardWidget->window)
aeeb6a44 RR	415	{
e5ea3f7a RR	416	m_waiting = TRUE;
e5ea3f7a RR	417
aeeb6a44	418	gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY, GDK_CURRENT_TIME );
e5ea3f7a RR	419
e5ea3f7a RR	420	while (m_waiting) gtk_main_iteration();
aeeb6a44 RR	421	}
aeeb6a44 RR	422
0d2a2b60 RR	423	if (m_dataBroker)
	424	{
	425	delete m_dataBroker;
	426	m_dataBroker = (wxDataBroker*) NULL;
	427	}
b453e1b2 RR	428
	429	#if wxUSE_THREADS
	430	/* re-enable GUI threads */
	431	wxapp_install_thread_wakeup();
	432	#endif
8b53e5a2	433	}
b527aac5	434
8b53e5a2	435	m_targetRequested = 0;
b527aac5	436
8b53e5a2 RR	437	m_formatSupported = FALSE;
	438	}
	439
	440	bool wxClipboard::Open()
	441	{
93c5dd39	442	wxCHECK_MSG( !m_open, FALSE, _T("clipboard already open") );
b527aac5	443
8b53e5a2	444	m_open = TRUE;
cee6127e	445
8b53e5a2	446	return TRUE;
dc86cb34 RR	447	}
dc86cb34 RR	448
75ce0581	449	bool wxClipboard::SetData( wxDataObject *data )
dc86cb34	450	{
93c5dd39	451	wxCHECK_MSG( m_open, FALSE, _T("clipboard not open") );
75ce0581	452
93c5dd39	453	wxCHECK_MSG( data, FALSE, _T("data is invalid") );
db1b4961	454
0d2a2b60	455	Clear();
75ce0581 RR	456
	457	return AddData( data );
	458	}
	459
	460	bool wxClipboard::AddData( wxDataObject *data )
	461	{
93c5dd39	462	wxCHECK_MSG( m_open, FALSE, _T("clipboard not open") );
0d2a2b60	463
93c5dd39	464	wxCHECK_MSG( data, FALSE, _T("data is invalid") );
2830bf19	465
75ce0581	466	/* if clipboard has been cleared before, create new data broker */
75ce0581	467	if (!m_dataBroker) m_dataBroker = new wxDataBroker();
8b53e5a2	468
75ce0581	469	/* add new data to list of offered data objects */
75ce0581 RR	470	m_dataBroker->Add( data );
	471
	472	/* get native format id of new data object */
75ce0581	473	GdkAtom format = data->GetFormat().GetAtom();
8b53e5a2	474
93c5dd39	475	wxCHECK_MSG( format, FALSE, _T("data has invalid format") );
75ce0581 RR	476
75ce0581 RR	477	/* This should happen automatically, but to be on the safe side */
75ce0581 RR	478	m_ownsClipboard = FALSE;
75ce0581 RR	479	m_ownsPrimarySelection = FALSE;
aeeb6a44	480
75ce0581	481	/* Add handlers if someone requests data */
d345e841 RR	482
	483	#if (GTK_MINOR_VERSION > 0)
	484
	485	gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget),
	486	GDK_SELECTION_PRIMARY,
	487	format,
	488	0 ); /* what is info ? */
	489
	490	gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget),
	491	g_clipboardAtom,
	492	format,
	493	0 ); /* what is info ? */
	494
	495	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	496	"selection_get",
	497	GTK_SIGNAL_FUNC(selection_handler),
	498	(gpointer) NULL );
	499
	500	#else
	501
75ce0581	502	gtk_selection_add_handler( m_clipboardWidget,
8b53e5a2	503	g_clipboardAtom,
0d2a2b60	504	format,
8b53e5a2	505	selection_handler,
0d2a2b60	506	(gpointer) NULL );
8b53e5a2	507
75ce0581	508	gtk_selection_add_handler( m_clipboardWidget,
aeeb6a44	509	GDK_SELECTION_PRIMARY,
0d2a2b60	510	format,
aeeb6a44	511	selection_handler,
0d2a2b60	512	(gpointer) NULL );
d345e841	513	#endif
db2d879a	514
b453e1b2 RR	515	#if wxUSE_THREADS
	516	/* disable GUI threads */
	517	wxapp_uninstall_thread_wakeup();
	518	#endif
	519
75ce0581	520	/* Tell the world we offer clipboard data */
75ce0581	521	if (!gtk_selection_owner_set( m_clipboardWidget,
8b53e5a2 RR	522	g_clipboardAtom,
8b53e5a2 RR	523	GDK_CURRENT_TIME ))
75ce0581	524	{
b453e1b2 RR	525	#if wxUSE_THREADS
	526	/* re-enable GUI threads */
	527	wxapp_install_thread_wakeup();
	528	#endif
75ce0581 RR	529	return FALSE;
	530	}
	531	m_ownsClipboard = TRUE;
aeeb6a44	532
75ce0581	533	if (!gtk_selection_owner_set( m_clipboardWidget,
aeeb6a44 RR	534	GDK_SELECTION_PRIMARY,
aeeb6a44 RR	535	GDK_CURRENT_TIME ))
75ce0581	536	{
b453e1b2 RR	537	#if wxUSE_THREADS
	538	/* re-enable GUI threads */
	539	wxapp_install_thread_wakeup();
	540	#endif
75ce0581	541	return FALSE;
aeeb6a44	542	}
75ce0581	543	m_ownsPrimarySelection = TRUE;
b453e1b2 RR	544
	545	#if wxUSE_THREADS
	546	/* re-enable GUI threads */
	547	wxapp_install_thread_wakeup();
	548	#endif
75ce0581	549
8b53e5a2 RR	550	return TRUE;
8b53e5a2 RR	551	}
db1b4961	552
8b53e5a2 RR	553	void wxClipboard::Close()
8b53e5a2 RR	554	{
93c5dd39	555	wxCHECK_RET( m_open, _T("clipboard not open") );
8b53e5a2 RR	556
8b53e5a2 RR	557	m_open = FALSE;
dc86cb34 RR	558	}
dc86cb34 RR	559
5f699c22	560	bool wxClipboard::IsSupported( wxDataFormat format )
b527aac5	561	{
93c5dd39	562	wxCHECK_MSG( m_open, FALSE, _T("clipboard not open") );
0d2a2b60	563
75ce0581	564	/* store requested format to be asked for by callbacks */
0d2a2b60	565
5f699c22	566	m_targetRequested = format.GetAtom();
b527aac5	567
93c5dd39	568	wxCHECK_MSG( m_targetRequested, FALSE, _T("invalid clipboard format") );
0d2a2b60	569
8b53e5a2	570	m_formatSupported = FALSE;
b527aac5	571
0d2a2b60	572	/* perform query. this will set m_formatSupported to
034be888 RR	573	TRUE if m_targetRequested is supported.
	574	alsom we have to wait for the "answer" from the
	575	clipboard owner which is an asynchronous process.
	576	therefore we set m_waiting = TRUE here and wait
	577	until the callback "targets_selection_received"
	578	sets it to FALSE */
	579
	580	m_waiting = TRUE;
ca35e608	581
034be888	582	gtk_selection_convert( m_targetsWidget,
cee6127e	583	m_usePrimary?GDK_SELECTION_PRIMARY:g_clipboardAtom,
8b53e5a2 RR	584	g_targetsAtom,
8b53e5a2 RR	585	GDK_CURRENT_TIME );
ca35e608	586
034be888 RR	587	while (m_waiting) gtk_main_iteration();
034be888 RR	588
8b53e5a2	589	if (!m_formatSupported) return FALSE;
75ce0581 RR	590
	591	return TRUE;
	592	}
	593
5f699c22	594	bool wxClipboard::GetData( wxDataObject *data )
75ce0581	595	{
93c5dd39	596	wxCHECK_MSG( m_open, FALSE, _T("clipboard not open") );
75ce0581 RR	597
	598	/* is data supported by clipboard ? */
	599
5f699c22	600	if (!IsSupported( data->GetFormat() )) return FALSE;
75ce0581 RR	601
	602	/* store pointer to data object to be filled up by callbacks */
	603
5f699c22	604	m_receivedData = data;
75ce0581 RR	605
	606	/* store requested format to be asked for by callbacks */
	607
5f699c22	608	m_targetRequested = data->GetFormat().GetAtom();
b527aac5	609
93c5dd39	610	wxCHECK_MSG( m_targetRequested, FALSE, _T("invalid clipboard format") );
75ce0581 RR	611
75ce0581 RR	612	/* start query */
8b53e5a2	613
8b53e5a2	614	m_formatSupported = FALSE;
b527aac5	615
034be888 RR	616	/* ask for clipboard contents. this will set
	617	m_formatSupported to TRUE if m_targetRequested
	618	is supported.
	619	also, we have to wait for the "answer" from the
	620	clipboard owner which is an asynchronous process.
	621	therefore we set m_waiting = TRUE here and wait
	622	until the callback "targets_selection_received"
	623	sets it to FALSE */
b527aac5	624
034be888	625	m_waiting = TRUE;
75ce0581	626
8b53e5a2	627	gtk_selection_convert( m_clipboardWidget,
cee6127e	628	m_usePrimary?GDK_SELECTION_PRIMARY:g_clipboardAtom,
8b53e5a2 RR	629	m_targetRequested,
8b53e5a2 RR	630	GDK_CURRENT_TIME );
b527aac5	631
034be888	632	while (m_waiting) gtk_main_iteration();
b527aac5	633
0d2a2b60 RR	634	/* this is a true error as we checked for the presence of such data before */
0d2a2b60 RR	635
93c5dd39	636	wxCHECK_MSG( m_formatSupported, FALSE, _T("error retrieving data from clipboard") );
8b53e5a2 RR	637
8b53e5a2 RR	638	return TRUE;
b527aac5 RR	639	}
b527aac5 RR	640
b527aac5 RR	641	//-----------------------------------------------------------------------------
	642	// wxClipboardModule
	643	//-----------------------------------------------------------------------------
	644
	645	IMPLEMENT_DYNAMIC_CLASS(wxClipboardModule,wxModule)
	646
	647	bool wxClipboardModule::OnInit()
	648	{
8b53e5a2	649	wxTheClipboard = new wxClipboard();
b527aac5	650
8b53e5a2	651	return TRUE;
b527aac5 RR	652	}
	653
	654	void wxClipboardModule::OnExit()
dc86cb34	655	{
8b53e5a2 RR	656	if (wxTheClipboard) delete wxTheClipboard;
8b53e5a2 RR	657	wxTheClipboard = (wxClipboard*) NULL;
dc86cb34	658	}
ac57418f RR	659
	660	#endif
	661
	662	// wxUSE_CLIPBOARD
	663