src/x11/clipbrd.cpp

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

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