src/x11/clipbrd.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        clipbrd.cpp
// Purpose:     Clipboard functionality
// Author:      Robert Roebling
// Created:
// RCS-ID:      $Id$
// Copyright:   (c) Robert Roebling
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "clipbrd.h"
#endif

#include "wx/clipbrd.h"

#if wxUSE_CLIPBOARD

#include "wx/dataobj.h"
#include "wx/utils.h"
#include "wx/log.h"

#include "wx/x11/private.h"

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

#if !wxUSE_NANOX
Atom  g_clipboardAtom   = 0;
Atom  g_targetsAtom     = 0;
#endif

// the trace mask we use with wxLogTrace() - call
// wxLog::AddTraceMask(TRACE_CLIPBOARD) to enable the trace messages from here
// (there will be a *lot* of them!)
static const wxChar *TRACE_CLIPBOARD = _T("clipboard");

//-----------------------------------------------------------------------------
// 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
//-----------------------------------------------------------------------------

#if 0

static void
targets_selection_received( GtkWidget *WXUNUSED(widget),
                            GtkSelectionData *selection_data,
#if (GTK_MINOR_VERSION > 0)
                            guint32 WXUNUSED(time),
#endif
                            wxClipboard *clipboard )
{
    if ( wxTheClipboard && selection_data->length > 0 )
    {
        /* make sure we got the data in the correct form */
        GdkAtom type = selection_data->type;
        if ( type != GDK_SELECTION_TYPE_ATOM )
        {
            if ( strcmp(gdk_atom_name(type), "TARGETS") )
            {
                wxLogTrace( TRACE_CLIPBOARD,
                            _T("got unsupported clipboard target") );

                clipboard->m_waiting = FALSE;
                return;
            }
        }

#ifdef __WXDEBUG__
        wxDataFormat clip( selection_data->selection );
        wxLogTrace( TRACE_CLIPBOARD,
                    wxT("selection received for targets, clipboard %s"),
                    clip.GetId().c_str() );
#endif // __WXDEBUG__

        // 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++)
        {
            wxDataFormat format( atoms[i] );

            wxLogTrace( TRACE_CLIPBOARD,
                        wxT("selection received for targets, format %s"),
                        format.GetId().c_str() );

            if (format == clipboard->m_targetRequested)
            {
                clipboard->m_waiting = FALSE;
                clipboard->m_formatSupported = TRUE;
                return;
            }
        }
    }

    clipboard->m_waiting = FALSE;
}

//-----------------------------------------------------------------------------
// "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;
    }

    wxDataFormat format( selection_data->target );

    /* make sure we got the data in the correct format */
    if (!data_object->IsSupportedFormat( format ) )
    {
        clipboard->m_waiting = FALSE;
        return;
    }

    /* make sure we got the data in the correct form (selection type).
       if so, copy data to target object */
    if (selection_data->type != GDK_SELECTION_TYPE_STRING)
    {
        clipboard->m_waiting = FALSE;
        return;
    }

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

    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_data)
        {
            wxLogTrace(TRACE_CLIPBOARD, wxT("wxClipboard will get cleared" ));

            delete wxTheClipboard->m_data;
            wxTheClipboard->m_data = (wxDataObject*) NULL;
        }
    }

    wxTheClipboard->m_waiting = FALSE;
    return TRUE;
}

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

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

    if (!wxTheClipboard->m_data) return;

    wxDataObject *data = wxTheClipboard->m_data;

    wxDataFormat format( selection_data->target );

    if (!data->IsSupportedFormat( format )) return;

    int size = data->GetDataSize( format );

    if (size == 0) return;

    void *d = malloc(size);

    data->GetDataHere( selection_data->target, d );

    // transform Unicode text into multibyte before putting it on clipboard
#if wxUSE_UNICODE
    if ( format.GetType() == wxDF_TEXT )
    {
        const wchar_t *wstr = (const wchar_t *)d;
        size_t len = wxConvCurrent->WC2MB(NULL, wstr, 0);
        char *str = malloc(len + 1);
        wxConvCurrent->WC2MB(str, wstr, len);
        str[len] = '\0';

        free(d);
        d = str;
    }
#endif // wxUSE_UNICODE

    gtk_selection_data_set(
        selection_data,
        GDK_SELECTION_TYPE_STRING,
        8*sizeof(gchar),
        (unsigned char*) d,
        size );

    free(d);
}

#endif

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

IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)

wxClipboard::wxClipboard()
{
    m_open = FALSE;

    m_ownsClipboard = FALSE;
    m_ownsPrimarySelection = FALSE;

    m_data = (wxDataObject*) NULL;
    m_receivedData = (wxDataObject*) NULL;

    /* we use m_targetsWidget to query what formats are available */

    /* we use m_clipboardWidget to get and to offer data */
#if !wxUSE_NANOX
    if (!g_clipboardAtom) g_clipboardAtom = XInternAtom( (Display*) wxGetDisplay(), "CLIPBOARD", False );
    if (!g_targetsAtom) g_targetsAtom = XInternAtom( (Display*) wxGetDisplay(), "TARGETS", False );
#endif

    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_data)
    {
#if wxUSE_THREADS
        /* disable GUI threads */
#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 0
        if (gdk_selection_owner_get( g_clipboardAtom ) == m_clipboardWidget->window)
        {
            m_waiting = TRUE;

            gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom,
                                     (guint32) 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,
                                     (guint32) GDK_CURRENT_TIME );

            while (m_waiting) gtk_main_iteration();
        }
#endif

        if (m_data)
        {
            delete m_data;
            m_data = (wxDataObject*) NULL;
        }

#if wxUSE_THREADS
        /* re-enable GUI threads */
#endif
    }

    m_targetRequested = 0;
    m_formatSupported = FALSE;
}

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

    m_open = TRUE;

    return TRUE;
}

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

    wxCHECK_MSG( data, FALSE, wxT("data is invalid") );

    Clear();

    return AddData( data );
}

bool wxClipboard::AddData( wxDataObject *data )
{
#if wxUSE_NANOX
    return FALSE;
#else
    wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") );

    wxCHECK_MSG( data, FALSE, wxT("data is invalid") );

    /* we can only store one wxDataObject */
    Clear();

    m_data = data;

    /* get formats from wxDataObjects */
    wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ];
    m_data->GetAllFormats( array );

#if 0
    /* primary selection or clipboard */
    Atom clipboard = m_usePrimary ? (Atom) 1  // 1 = primary selection
                                  : g_clipboardAtom;
#endif // 0


    for (size_t i = 0; i < m_data->GetFormatCount(); i++)
    {
        wxLogTrace( TRACE_CLIPBOARD,
                    wxT("wxClipboard now supports atom %s"),
                    array[i].GetId().c_str() );

#if 0
        gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget),
                                  clipboard,
                                  array[i],
                                  0 );  /* what is info ? */
#endif
    }

    delete[] array;

#if 0
    gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
                        "selection_get",
                        GTK_SIGNAL_FUNC(selection_handler),
                        (gpointer) NULL );
#endif

#if wxUSE_THREADS
    /* disable GUI threads */
#endif

    bool res = FALSE;
#if 0
    /* Tell the world we offer clipboard data */
    res = (gtk_selection_owner_set( m_clipboardWidget,
                                         clipboard,
                                         (guint32) GDK_CURRENT_TIME ));
#endif

    if (m_usePrimary)
        m_ownsPrimarySelection = res;
    else
        m_ownsClipboard = res;

#if wxUSE_THREADS
    /* re-enable GUI threads */
#endif

    return res;
#endif
}

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

    m_open = FALSE;
}

bool wxClipboard::IsOpened() const
{
    return m_open;
}

bool wxClipboard::IsSupported( const wxDataFormat& format )
{
    /* reentrance problems */
    if (m_waiting) return FALSE;

    /* store requested format to be asked for by callbacks */
    m_targetRequested = format;

#if 0
    wxLogTrace( TRACE_CLIPBOARD,
                wxT("wxClipboard:IsSupported: requested format: %s"),
                format.GetId().c_str() );
#endif

    wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") );

    m_formatSupported = FALSE;

    /* perform query. 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;

#if 0
    gtk_selection_convert( m_targetsWidget,
                           m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
                                        : g_clipboardAtom,
                           g_targetsAtom,
                           (guint32) GDK_CURRENT_TIME );

    while (m_waiting) gtk_main_iteration();
#endif

    if (!m_formatSupported) return FALSE;

    return TRUE;
}

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

    /* get formats from wxDataObjects */
    wxDataFormat *array = new wxDataFormat[ data.GetFormatCount() ];
    data.GetAllFormats( array );

    for (size_t i = 0; i < data.GetFormatCount(); i++)
    {
        wxDataFormat format( array[i] );

        wxLogTrace( TRACE_CLIPBOARD,
                    wxT("wxClipboard::GetData: requested format: %s"),
                    format.GetId().c_str() );

        /* is data supported by clipboard ? */

        /* store requested format to be asked for by callbacks */
        m_targetRequested = format;

        wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") );

        m_formatSupported = FALSE;

       /* perform query. 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;

#if 0
        gtk_selection_convert( m_targetsWidget,
                           m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
                                        : g_clipboardAtom,
                           g_targetsAtom,
                           (guint32) GDK_CURRENT_TIME );

        while (m_waiting) gtk_main_iteration();
#endif

        if (!m_formatSupported) continue;

        /* 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 = format;

        wxCHECK_MSG( m_targetRequested, FALSE, wxT("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;

        wxLogTrace( TRACE_CLIPBOARD,
                    wxT("wxClipboard::GetData: format found, start convert") );

#if 0
        gtk_selection_convert( m_clipboardWidget,
                               m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
                                            : g_clipboardAtom,
                               m_targetRequested,
                               (guint32) GDK_CURRENT_TIME );

        while (m_waiting) gtk_main_iteration();
#endif

        /* this is a true error as we checked for the presence of such data before */
        wxCHECK_MSG( m_formatSupported, FALSE, wxT("error retrieving data from clipboard") );

        /* return success */
        delete[] array;
        return TRUE;
    }

    wxLogTrace( TRACE_CLIPBOARD,
                wxT("wxClipboard::GetData: format not found") );

    /* return failure */
    delete[] array;
    return FALSE;
}

#endif
  // wxUSE_CLIPBOARD
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: clipbrd.cpp
	3	// Purpose: Clipboard functionality
	4	// Author: Robert Roebling
	5	// Created:
	6	// RCS-ID: $Id$
	7	// Copyright: (c) Robert Roebling
	8	// Licence: wxWindows licence
	9	/////////////////////////////////////////////////////////////////////////////
	10
	11	#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
	12	#pragma implementation "clipbrd.h"
	13	#endif
	14
	15	#include "wx/clipbrd.h"
	16
	17	#if wxUSE_CLIPBOARD
	18
	19	#include "wx/dataobj.h"
	20	#include "wx/utils.h"
	21	#include "wx/log.h"
	22
	23	#include "wx/x11/private.h"
	24
	25	//-----------------------------------------------------------------------------
	26	// data
	27	//-----------------------------------------------------------------------------
	28
	29	#if !wxUSE_NANOX
	30	Atom g_clipboardAtom = 0;
	31	Atom g_targetsAtom = 0;
	32	#endif
	33
	34	// the trace mask we use with wxLogTrace() - call
	35	// wxLog::AddTraceMask(TRACE_CLIPBOARD) to enable the trace messages from here
	36	// (there will be a lot of them!)
	37	static const wxChar *TRACE_CLIPBOARD = _T("clipboard");
	38
	39	//-----------------------------------------------------------------------------
	40	// reminder
	41	//-----------------------------------------------------------------------------
	42
	43	/* The contents of a selection are returned in a GtkSelectionData
	44	structure. selection/target identify the request.
	45	type specifies the type of the return; if length < 0, and
	46	the data should be ignored. This structure has object semantics -
	47	no fields should be modified directly, they should not be created
	48	directly, and pointers to them should not be stored beyond the duration of
	49	a callback. (If the last is changed, we'll need to add reference
	50	counting)
	51
	52	struct _GtkSelectionData
	53	{
	54	GdkAtom selection;
	55	GdkAtom target;
	56	GdkAtom type;
	57	gint format;
	58	guchar *data;
	59	gint length;
	60	};
	61
	62	*/
	63
	64	//-----------------------------------------------------------------------------
	65	// "selection_received" for targets
	66	//-----------------------------------------------------------------------------
	67
	68	#if 0
	69
	70	static void
	71	targets_selection_received( GtkWidget *WXUNUSED(widget),
	72	GtkSelectionData *selection_data,
	73	#if (GTK_MINOR_VERSION > 0)
	74	guint32 WXUNUSED(time),
	75	#endif
	76	wxClipboard *clipboard )
	77	{
	78	if ( wxTheClipboard && selection_data->length > 0 )
	79	{
	80	/* make sure we got the data in the correct form */
	81	GdkAtom type = selection_data->type;
	82	if ( type != GDK_SELECTION_TYPE_ATOM )
	83	{
	84	if ( strcmp(gdk_atom_name(type), "TARGETS") )
	85	{
	86	wxLogTrace( TRACE_CLIPBOARD,
	87	_T("got unsupported clipboard target") );
	88
	89	clipboard->m_waiting = FALSE;
	90	return;
	91	}
	92	}
	93
	94	#ifdef __WXDEBUG__
	95	wxDataFormat clip( selection_data->selection );
	96	wxLogTrace( TRACE_CLIPBOARD,
	97	wxT("selection received for targets, clipboard %s"),
	98	clip.GetId().c_str() );
	99	#endif // __WXDEBUG__
	100
	101	// the atoms we received, holding a list of targets (= formats)
	102	GdkAtom atoms = (GdkAtom )selection_data->data;
	103
	104	for (unsigned int i=0; i<selection_data->length/sizeof(GdkAtom); i++)
	105	{
	106	wxDataFormat format( atoms[i] );
	107
	108	wxLogTrace( TRACE_CLIPBOARD,
	109	wxT("selection received for targets, format %s"),
	110	format.GetId().c_str() );
	111
	112	if (format == clipboard->m_targetRequested)
	113	{
	114	clipboard->m_waiting = FALSE;
	115	clipboard->m_formatSupported = TRUE;
	116	return;
	117	}
	118	}
	119	}
	120
	121	clipboard->m_waiting = FALSE;
	122	}
	123
	124	//-----------------------------------------------------------------------------
	125	// "selection_received" for the actual data
	126	//-----------------------------------------------------------------------------
	127
	128	static void
	129	selection_received( GtkWidget *WXUNUSED(widget),
	130	GtkSelectionData *selection_data,
	131	#if (GTK_MINOR_VERSION > 0)
	132	guint32 WXUNUSED(time),
	133	#endif
	134	wxClipboard *clipboard )
	135	{
	136	if (!wxTheClipboard)
	137	{
	138	clipboard->m_waiting = FALSE;
	139	return;
	140	}
	141
	142	wxDataObject *data_object = clipboard->m_receivedData;
	143
	144	if (!data_object)
	145	{
	146	clipboard->m_waiting = FALSE;
	147	return;
	148	}
	149
	150	if (selection_data->length <= 0)
	151	{
	152	clipboard->m_waiting = FALSE;
	153	return;
	154	}
	155
	156	wxDataFormat format( selection_data->target );
	157
	158	/* make sure we got the data in the correct format */
	159	if (!data_object->IsSupportedFormat( format ) )
	160	{
	161	clipboard->m_waiting = FALSE;
	162	return;
	163	}
	164
	165	/* make sure we got the data in the correct form (selection type).
	166	if so, copy data to target object */
	167	if (selection_data->type != GDK_SELECTION_TYPE_STRING)
	168	{
	169	clipboard->m_waiting = FALSE;
	170	return;
	171	}
	172
	173	data_object->SetData( format, (size_t) selection_data->length, (const char*) selection_data->data );
	174
	175	wxTheClipboard->m_formatSupported = TRUE;
	176	clipboard->m_waiting = FALSE;
	177	}
	178
	179	//-----------------------------------------------------------------------------
	180	// "selection_clear"
	181	//-----------------------------------------------------------------------------
	182
	183	static gint
	184	selection_clear_clip( GtkWidget WXUNUSED(widget), GdkEventSelection event )
	185	{
	186	if (!wxTheClipboard) return TRUE;
	187
	188	if (event->selection == GDK_SELECTION_PRIMARY)
	189	{
	190	wxTheClipboard->m_ownsPrimarySelection = FALSE;
	191	}
	192	else
	193	if (event->selection == g_clipboardAtom)
	194	{
	195	wxTheClipboard->m_ownsClipboard = FALSE;
	196	}
	197	else
	198	{
	199	wxTheClipboard->m_waiting = FALSE;
	200	return FALSE;
	201	}
	202
	203	if ((!wxTheClipboard->m_ownsPrimarySelection) &&
	204	(!wxTheClipboard->m_ownsClipboard))
	205	{
	206	/* the clipboard is no longer in our hands. we can the delete clipboard data. */
	207	if (wxTheClipboard->m_data)
	208	{
	209	wxLogTrace(TRACE_CLIPBOARD, wxT("wxClipboard will get cleared" ));
	210
	211	delete wxTheClipboard->m_data;
	212	wxTheClipboard->m_data = (wxDataObject*) NULL;
	213	}
	214	}
	215
	216	wxTheClipboard->m_waiting = FALSE;
	217	return TRUE;
	218	}
	219
	220	//-----------------------------------------------------------------------------
	221	// selection handler for supplying data
	222	//-----------------------------------------------------------------------------
	223
	224	static void
	225	selection_handler( GtkWidget *WXUNUSED(widget),
	226	GtkSelectionData *selection_data,
	227	guint WXUNUSED(info),
	228	guint WXUNUSED(time),
	229	gpointer WXUNUSED(data) )
	230	{
	231	if (!wxTheClipboard) return;
	232
	233	if (!wxTheClipboard->m_data) return;
	234
	235	wxDataObject *data = wxTheClipboard->m_data;
	236
	237	wxDataFormat format( selection_data->target );
	238
	239	if (!data->IsSupportedFormat( format )) return;
	240
	241	int size = data->GetDataSize( format );
	242
	243	if (size == 0) return;
	244
	245	void *d = malloc(size);
	246
	247	data->GetDataHere( selection_data->target, d );
	248
	249	// transform Unicode text into multibyte before putting it on clipboard
	250	#if wxUSE_UNICODE
	251	if ( format.GetType() == wxDF_TEXT )
	252	{
	253	const wchar_t wstr = (const wchar_t )d;
	254	size_t len = wxConvCurrent->WC2MB(NULL, wstr, 0);
	255	char *str = malloc(len + 1);
	256	wxConvCurrent->WC2MB(str, wstr, len);
	257	str[len] = '\0';
	258
	259	free(d);
	260	d = str;
	261	}
	262	#endif // wxUSE_UNICODE
	263
	264	gtk_selection_data_set(
	265	selection_data,
	266	GDK_SELECTION_TYPE_STRING,
	267	8*sizeof(gchar),
	268	(unsigned char*) d,
	269	size );
	270
	271	free(d);
	272	}
	273
	274	#endif
	275
	276	//-----------------------------------------------------------------------------
	277	// wxClipboard
	278	//-----------------------------------------------------------------------------
	279
	280	IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
	281
	282	wxClipboard::wxClipboard()
	283	{
	284	m_open = FALSE;
	285
	286	m_ownsClipboard = FALSE;
	287	m_ownsPrimarySelection = FALSE;
	288
	289	m_data = (wxDataObject*) NULL;
	290	m_receivedData = (wxDataObject*) NULL;
	291
	292	/* we use m_targetsWidget to query what formats are available */
	293
	294	/* we use m_clipboardWidget to get and to offer data */
	295	#if !wxUSE_NANOX
	296	if (!g_clipboardAtom) g_clipboardAtom = XInternAtom( (Display*) wxGetDisplay(), "CLIPBOARD", False );
	297	if (!g_targetsAtom) g_targetsAtom = XInternAtom( (Display*) wxGetDisplay(), "TARGETS", False );
	298	#endif
	299
	300	m_formatSupported = FALSE;
	301	m_targetRequested = 0;
	302
	303	m_usePrimary = FALSE;
	304	}
	305
	306	wxClipboard::~wxClipboard()
	307	{
	308	Clear();
	309
	310	// if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
	311	// if (m_targetsWidget) gtk_widget_destroy( m_targetsWidget );
	312	}
	313
	314	void wxClipboard::Clear()
	315	{
	316	if (m_data)
	317	{
	318	#if wxUSE_THREADS
	319	/* disable GUI threads */
	320	#endif
	321
	322	/* As we have data we also own the clipboard. Once we no longer own
	323	it, clear_selection is called which will set m_data to zero */
	324	#if 0
	325	if (gdk_selection_owner_get( g_clipboardAtom ) == m_clipboardWidget->window)
	326	{
	327	m_waiting = TRUE;
	328
	329	gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom,
	330	(guint32) GDK_CURRENT_TIME );
	331
	332	while (m_waiting) gtk_main_iteration();
	333	}
	334
	335	if (gdk_selection_owner_get( GDK_SELECTION_PRIMARY ) == m_clipboardWidget->window)
	336	{
	337	m_waiting = TRUE;
	338
	339	gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY,
	340	(guint32) GDK_CURRENT_TIME );
	341
	342	while (m_waiting) gtk_main_iteration();
	343	}
	344	#endif
	345
	346	if (m_data)
	347	{
	348	delete m_data;
	349	m_data = (wxDataObject*) NULL;
	350	}
	351
	352	#if wxUSE_THREADS
	353	/* re-enable GUI threads */
	354	#endif
	355	}
	356
	357	m_targetRequested = 0;
	358	m_formatSupported = FALSE;
	359	}
	360
	361	bool wxClipboard::Open()
	362	{
	363	wxCHECK_MSG( !m_open, FALSE, wxT("clipboard already open") );
	364
	365	m_open = TRUE;
	366
	367	return TRUE;
	368	}
	369
	370	bool wxClipboard::SetData( wxDataObject *data )
	371	{
	372	wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") );
	373
	374	wxCHECK_MSG( data, FALSE, wxT("data is invalid") );
	375
	376	Clear();
	377
	378	return AddData( data );
	379	}
	380
	381	bool wxClipboard::AddData( wxDataObject *data )
	382	{
	383	#if wxUSE_NANOX
	384	return FALSE;
	385	#else
	386	wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") );
	387
	388	wxCHECK_MSG( data, FALSE, wxT("data is invalid") );
	389
	390	/* we can only store one wxDataObject */
	391	Clear();
	392
	393	m_data = data;
	394
	395	/* get formats from wxDataObjects */
	396	wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ];
	397	m_data->GetAllFormats( array );
	398
	399	#if 0
	400	/* primary selection or clipboard */
	401	Atom clipboard = m_usePrimary ? (Atom) 1 // 1 = primary selection
	402	: g_clipboardAtom;
	403	#endif // 0
	404
	405
	406	for (size_t i = 0; i < m_data->GetFormatCount(); i++)
	407	{
	408	wxLogTrace( TRACE_CLIPBOARD,
	409	wxT("wxClipboard now supports atom %s"),
	410	array[i].GetId().c_str() );
	411
	412	#if 0
	413	gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget),
	414	clipboard,
	415	array[i],
	416	0 ); /* what is info ? */
	417	#endif
	418	}
	419
	420	delete[] array;
	421
	422	#if 0
	423	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	424	"selection_get",
	425	GTK_SIGNAL_FUNC(selection_handler),
	426	(gpointer) NULL );
	427	#endif
	428
	429	#if wxUSE_THREADS
	430	/* disable GUI threads */
	431	#endif
	432
	433	bool res = FALSE;
	434	#if 0
	435	/* Tell the world we offer clipboard data */
	436	res = (gtk_selection_owner_set( m_clipboardWidget,
	437	clipboard,
	438	(guint32) GDK_CURRENT_TIME ));
	439	#endif
	440
	441	if (m_usePrimary)
	442	m_ownsPrimarySelection = res;
	443	else
	444	m_ownsClipboard = res;
	445
	446	#if wxUSE_THREADS
	447	/* re-enable GUI threads */
	448	#endif
	449
	450	return res;
	451	#endif
	452	}
	453
	454	void wxClipboard::Close()
	455	{
	456	wxCHECK_RET( m_open, wxT("clipboard not open") );
	457
	458	m_open = FALSE;
	459	}
	460
	461	bool wxClipboard::IsOpened() const
	462	{
	463	return m_open;
	464	}
	465
	466	bool wxClipboard::IsSupported( const wxDataFormat& format )
	467	{
	468	/* reentrance problems */
	469	if (m_waiting) return FALSE;
	470
	471	/* store requested format to be asked for by callbacks */
	472	m_targetRequested = format;
	473
	474	#if 0
	475	wxLogTrace( TRACE_CLIPBOARD,
	476	wxT("wxClipboard:IsSupported: requested format: %s"),
	477	format.GetId().c_str() );
	478	#endif
	479
	480	wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") );
	481
	482	m_formatSupported = FALSE;
	483
	484	/* perform query. this will set m_formatSupported to
	485	TRUE if m_targetRequested is supported.
	486	also, we have to wait for the "answer" from the
	487	clipboard owner which is an asynchronous process.
	488	therefore we set m_waiting = TRUE here and wait
	489	until the callback "targets_selection_received"
	490	sets it to FALSE */
	491
	492	m_waiting = TRUE;
	493
	494	#if 0
	495	gtk_selection_convert( m_targetsWidget,
	496	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	497	: g_clipboardAtom,
	498	g_targetsAtom,
	499	(guint32) GDK_CURRENT_TIME );
	500
	501	while (m_waiting) gtk_main_iteration();
	502	#endif
	503
	504	if (!m_formatSupported) return FALSE;
	505
	506	return TRUE;
	507	}
	508
	509	bool wxClipboard::GetData( wxDataObject& data )
	510	{
	511	wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") );
	512
	513	/* get formats from wxDataObjects */
	514	wxDataFormat *array = new wxDataFormat[ data.GetFormatCount() ];
	515	data.GetAllFormats( array );
	516
	517	for (size_t i = 0; i < data.GetFormatCount(); i++)
	518	{
	519	wxDataFormat format( array[i] );
	520
	521	wxLogTrace( TRACE_CLIPBOARD,
	522	wxT("wxClipboard::GetData: requested format: %s"),
	523	format.GetId().c_str() );
	524
	525	/* is data supported by clipboard ? */
	526
	527	/* store requested format to be asked for by callbacks */
	528	m_targetRequested = format;
	529
	530	wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") );
	531
	532	m_formatSupported = FALSE;
	533
	534	/* perform query. this will set m_formatSupported to
	535	TRUE if m_targetRequested is supported.
	536	also, we have to wait for the "answer" from the
	537	clipboard owner which is an asynchronous process.
	538	therefore we set m_waiting = TRUE here and wait
	539	until the callback "targets_selection_received"
	540	sets it to FALSE */
	541
	542	m_waiting = TRUE;
	543
	544	#if 0
	545	gtk_selection_convert( m_targetsWidget,
	546	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	547	: g_clipboardAtom,
	548	g_targetsAtom,
	549	(guint32) GDK_CURRENT_TIME );
	550
	551	while (m_waiting) gtk_main_iteration();
	552	#endif
	553
	554	if (!m_formatSupported) continue;
	555
	556	/* store pointer to data object to be filled up by callbacks */
	557	m_receivedData = &data;
	558
	559	/* store requested format to be asked for by callbacks */
	560	m_targetRequested = format;
	561
	562	wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") );
	563
	564	/* start query */
	565	m_formatSupported = FALSE;
	566
	567	/* ask for clipboard contents. this will set
	568	m_formatSupported to TRUE if m_targetRequested
	569	is supported.
	570	also, we have to wait for the "answer" from the
	571	clipboard owner which is an asynchronous process.
	572	therefore we set m_waiting = TRUE here and wait
	573	until the callback "targets_selection_received"
	574	sets it to FALSE */
	575
	576	m_waiting = TRUE;
	577
	578	wxLogTrace( TRACE_CLIPBOARD,
	579	wxT("wxClipboard::GetData: format found, start convert") );
	580
	581	#if 0
	582	gtk_selection_convert( m_clipboardWidget,
	583	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	584	: g_clipboardAtom,
	585	m_targetRequested,
	586	(guint32) GDK_CURRENT_TIME );
	587
	588	while (m_waiting) gtk_main_iteration();
	589	#endif
	590
	591	/* this is a true error as we checked for the presence of such data before */
	592	wxCHECK_MSG( m_formatSupported, FALSE, wxT("error retrieving data from clipboard") );
	593
	594	/* return success */
	595	delete[] array;
	596	return TRUE;
	597	}
	598
	599	wxLogTrace( TRACE_CLIPBOARD,
	600	wxT("wxClipboard::GetData: format not found") );
	601
	602	/* return failure */
	603	delete[] array;
	604	return FALSE;
	605	}
	606
	607	#endif
	608	// wxUSE_CLIPBOARD
	609