src/x11/clipbrd.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/x11/clipbrd.cpp
// Purpose:     Clipboard functionality
// Author:      Robert Roebling
// Created:
// RCS-ID:      $Id$
// Copyright:   (c) Robert Roebling
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// for compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#if wxUSE_CLIPBOARD

#include "wx/clipbrd.h"

#ifndef WX_PRECOMP
    #include "wx/log.h"
    #include "wx/utils.h"
    #include "wx/dataobj.h"
#endif

#include "wx/x11/private.h"

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

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

// avoid warnings about unused static variable
#if defined(__WXDEBUG__) && defined(HAVE_VARIADIC_MACROS)

// 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");

#endif // __WXDEBUG__

//-----------------------------------------------------------------------------
// 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 || format.GetType() == wxDF_UNICODETEXT)
    {
        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: src/x11/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	// for compilers that support precompilation, includes "wx.h".
	12	#include "wx/wxprec.h"
	13
	14	#if wxUSE_CLIPBOARD
	15
	16	#include "wx/clipbrd.h"
	17
	18	#ifndef WX_PRECOMP
	19	#include "wx/log.h"
	20	#include "wx/utils.h"
	21	#include "wx/dataobj.h"
	22	#endif
	23
	24	#include "wx/x11/private.h"
	25
	26	//-----------------------------------------------------------------------------
	27	// data
	28	//-----------------------------------------------------------------------------
	29
	30	#if !wxUSE_NANOX
	31	Atom g_clipboardAtom = 0;
	32	Atom g_targetsAtom = 0;
	33	#endif
	34
	35	// avoid warnings about unused static variable
	36	#if defined(__WXDEBUG__) && defined(HAVE_VARIADIC_MACROS)
	37
	38	// the trace mask we use with wxLogTrace() - call
	39	// wxLog::AddTraceMask(TRACE_CLIPBOARD) to enable the trace messages from here
	40	// (there will be a lot of them!)
	41	static const wxChar *TRACE_CLIPBOARD = _T("clipboard");
	42
	43	#endif // __WXDEBUG__
	44
	45	//-----------------------------------------------------------------------------
	46	// reminder
	47	//-----------------------------------------------------------------------------
	48
	49	/* The contents of a selection are returned in a GtkSelectionData
	50	structure. selection/target identify the request.
	51	type specifies the type of the return; if length < 0, and
	52	the data should be ignored. This structure has object semantics -
	53	no fields should be modified directly, they should not be created
	54	directly, and pointers to them should not be stored beyond the duration of
	55	a callback. (If the last is changed, we'll need to add reference
	56	counting)
	57
	58	struct _GtkSelectionData
	59	{
	60	GdkAtom selection;
	61	GdkAtom target;
	62	GdkAtom type;
	63	gint format;
	64	guchar *data;
	65	gint length;
	66	};
	67
	68	*/
	69
	70	//-----------------------------------------------------------------------------
	71	// "selection_received" for targets
	72	//-----------------------------------------------------------------------------
	73
	74	#if 0
	75
	76	static void
	77	targets_selection_received( GtkWidget *WXUNUSED(widget),
	78	GtkSelectionData *selection_data,
	79	#if (GTK_MINOR_VERSION > 0)
	80	guint32 WXUNUSED(time),
	81	#endif
	82	wxClipboard *clipboard )
	83	{
	84	if ( wxTheClipboard && selection_data->length > 0 )
	85	{
	86	/* make sure we got the data in the correct form */
	87	GdkAtom type = selection_data->type;
	88	if ( type != GDK_SELECTION_TYPE_ATOM )
	89	{
	90	if ( strcmp(gdk_atom_name(type), "TARGETS") )
	91	{
	92	wxLogTrace( TRACE_CLIPBOARD,
	93	_T("got unsupported clipboard target") );
	94
	95	clipboard->m_waiting = false;
	96	return;
	97	}
	98	}
	99
	100	#ifdef __WXDEBUG__
	101	wxDataFormat clip( selection_data->selection );
	102	wxLogTrace( TRACE_CLIPBOARD,
	103	wxT("selection received for targets, clipboard %s"),
	104	clip.GetId().c_str() );
	105	#endif // __WXDEBUG__
	106
	107	// the atoms we received, holding a list of targets (= formats)
	108	GdkAtom atoms = (GdkAtom )selection_data->data;
	109
	110	for (unsigned int i=0; i<selection_data->length/sizeof(GdkAtom); i++)
	111	{
	112	wxDataFormat format( atoms[i] );
	113
	114	wxLogTrace( TRACE_CLIPBOARD,
	115	wxT("selection received for targets, format %s"),
	116	format.GetId().c_str() );
	117
	118	if (format == clipboard->m_targetRequested)
	119	{
	120	clipboard->m_waiting = false;
	121	clipboard->m_formatSupported = true;
	122	return;
	123	}
	124	}
	125	}
	126
	127	clipboard->m_waiting = false;
	128	}
	129
	130	//-----------------------------------------------------------------------------
	131	// "selection_received" for the actual data
	132	//-----------------------------------------------------------------------------
	133
	134	static void
	135	selection_received( GtkWidget *WXUNUSED(widget),
	136	GtkSelectionData *selection_data,
	137	#if (GTK_MINOR_VERSION > 0)
	138	guint32 WXUNUSED(time),
	139	#endif
	140	wxClipboard *clipboard )
	141	{
	142	if (!wxTheClipboard)
	143	{
	144	clipboard->m_waiting = false;
	145	return;
	146	}
	147
	148	wxDataObject *data_object = clipboard->m_receivedData;
	149
	150	if (!data_object)
	151	{
	152	clipboard->m_waiting = false;
	153	return;
	154	}
	155
	156	if (selection_data->length <= 0)
	157	{
	158	clipboard->m_waiting = false;
	159	return;
	160	}
	161
	162	wxDataFormat format( selection_data->target );
	163
	164	/* make sure we got the data in the correct format */
	165	if (!data_object->IsSupportedFormat( format ) )
	166	{
	167	clipboard->m_waiting = false;
	168	return;
	169	}
	170
	171	/* make sure we got the data in the correct form (selection type).
	172	if so, copy data to target object */
	173	if (selection_data->type != GDK_SELECTION_TYPE_STRING)
	174	{
	175	clipboard->m_waiting = false;
	176	return;
	177	}
	178
	179	data_object->SetData( format, (size_t) selection_data->length, (const char*) selection_data->data );
	180
	181	wxTheClipboard->m_formatSupported = true;
	182	clipboard->m_waiting = false;
	183	}
	184
	185	//-----------------------------------------------------------------------------
	186	// "selection_clear"
	187	//-----------------------------------------------------------------------------
	188
	189	static gint
	190	selection_clear_clip( GtkWidget WXUNUSED(widget), GdkEventSelection event )
	191	{
	192	if (!wxTheClipboard) return TRUE;
	193
	194	if (event->selection == GDK_SELECTION_PRIMARY)
	195	{
	196	wxTheClipboard->m_ownsPrimarySelection = false;
	197	}
	198	else
	199	if (event->selection == g_clipboardAtom)
	200	{
	201	wxTheClipboard->m_ownsClipboard = false;
	202	}
	203	else
	204	{
	205	wxTheClipboard->m_waiting = false;
	206	return FALSE;
	207	}
	208
	209	if ((!wxTheClipboard->m_ownsPrimarySelection) &&
	210	(!wxTheClipboard->m_ownsClipboard))
	211	{
	212	/* the clipboard is no longer in our hands. we can the delete clipboard data. */
	213	if (wxTheClipboard->m_data)
	214	{
	215	wxLogTrace(TRACE_CLIPBOARD, wxT("wxClipboard will get cleared" ));
	216
	217	delete wxTheClipboard->m_data;
	218	wxTheClipboard->m_data = (wxDataObject*) NULL;
	219	}
	220	}
	221
	222	wxTheClipboard->m_waiting = false;
	223	return TRUE;
	224	}
	225
	226	//-----------------------------------------------------------------------------
	227	// selection handler for supplying data
	228	//-----------------------------------------------------------------------------
	229
	230	static void
	231	selection_handler( GtkWidget *WXUNUSED(widget),
	232	GtkSelectionData *selection_data,
	233	guint WXUNUSED(info),
	234	guint WXUNUSED(time),
	235	gpointer WXUNUSED(data) )
	236	{
	237	if (!wxTheClipboard) return;
	238
	239	if (!wxTheClipboard->m_data) return;
	240
	241	wxDataObject *data = wxTheClipboard->m_data;
	242
	243	wxDataFormat format( selection_data->target );
	244
	245	if (!data->IsSupportedFormat( format )) return;
	246
	247	int size = data->GetDataSize( format );
	248
	249	if (size == 0) return;
	250
	251	void *d = malloc(size);
	252
	253	data->GetDataHere( selection_data->target, d );
	254
	255	// transform Unicode text into multibyte before putting it on clipboard
	256	#if wxUSE_UNICODE
	257	if ( format.GetType() == wxDF_TEXT \|\| format.GetType() == wxDF_UNICODETEXT)
	258	{
	259	const wchar_t wstr = (const wchar_t )d;
	260	size_t len = wxConvCurrent->WC2MB(NULL, wstr, 0);
	261	char *str = malloc(len + 1);
	262	wxConvCurrent->WC2MB(str, wstr, len);
	263	str[len] = '\0';
	264
	265	free(d);
	266	d = str;
	267	}
	268	#endif // wxUSE_UNICODE
	269
	270	gtk_selection_data_set(
	271	selection_data,
	272	GDK_SELECTION_TYPE_STRING,
	273	8*sizeof(gchar),
	274	(unsigned char*) d,
	275	size );
	276
	277	free(d);
	278	}
	279
	280	#endif
	281
	282	//-----------------------------------------------------------------------------
	283	// wxClipboard
	284	//-----------------------------------------------------------------------------
	285
	286	IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
	287
	288	wxClipboard::wxClipboard()
	289	{
	290	m_open = false;
	291
	292	m_ownsClipboard = false;
	293	m_ownsPrimarySelection = false;
	294
	295	m_data = (wxDataObject*) NULL;
	296	m_receivedData = (wxDataObject*) NULL;
	297
	298	/* we use m_targetsWidget to query what formats are available */
	299
	300	/* we use m_clipboardWidget to get and to offer data */
	301	#if !wxUSE_NANOX
	302	if (!g_clipboardAtom) g_clipboardAtom = XInternAtom( (Display*) wxGetDisplay(), "CLIPBOARD", False );
	303	if (!g_targetsAtom) g_targetsAtom = XInternAtom( (Display*) wxGetDisplay(), "TARGETS", False );
	304	#endif
	305
	306	m_formatSupported = false;
	307	m_targetRequested = 0;
	308
	309	m_usePrimary = false;
	310	}
	311
	312	wxClipboard::~wxClipboard()
	313	{
	314	Clear();
	315
	316	// if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
	317	// if (m_targetsWidget) gtk_widget_destroy( m_targetsWidget );
	318	}
	319
	320	void wxClipboard::Clear()
	321	{
	322	if (m_data)
	323	{
	324	#if wxUSE_THREADS
	325	/* disable GUI threads */
	326	#endif
	327
	328	/* As we have data we also own the clipboard. Once we no longer own
	329	it, clear_selection is called which will set m_data to zero */
	330	#if 0
	331	if (gdk_selection_owner_get( g_clipboardAtom ) == m_clipboardWidget->window)
	332	{
	333	m_waiting = true;
	334
	335	gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom,
	336	(guint32) GDK_CURRENT_TIME );
	337
	338	while (m_waiting) gtk_main_iteration();
	339	}
	340
	341	if (gdk_selection_owner_get( GDK_SELECTION_PRIMARY ) == m_clipboardWidget->window)
	342	{
	343	m_waiting = true;
	344
	345	gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY,
	346	(guint32) GDK_CURRENT_TIME );
	347
	348	while (m_waiting) gtk_main_iteration();
	349	}
	350	#endif
	351
	352	if (m_data)
	353	{
	354	delete m_data;
	355	m_data = (wxDataObject*) NULL;
	356	}
	357
	358	#if wxUSE_THREADS
	359	/* re-enable GUI threads */
	360	#endif
	361	}
	362
	363	m_targetRequested = 0;
	364	m_formatSupported = false;
	365	}
	366
	367	bool wxClipboard::Open()
	368	{
	369	wxCHECK_MSG( !m_open, false, wxT("clipboard already open") );
	370
	371	m_open = true;
	372
	373	return true;
	374	}
	375
	376	bool wxClipboard::SetData( wxDataObject *data )
	377	{
	378	wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
	379
	380	wxCHECK_MSG( data, false, wxT("data is invalid") );
	381
	382	Clear();
	383
	384	return AddData( data );
	385	}
	386
	387	bool wxClipboard::AddData( wxDataObject *data )
	388	{
	389	#if wxUSE_NANOX
	390	return false;
	391	#else
	392	wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
	393
	394	wxCHECK_MSG( data, false, wxT("data is invalid") );
	395
	396	/* we can only store one wxDataObject */
	397	Clear();
	398
	399	m_data = data;
	400
	401	/* get formats from wxDataObjects */
	402	wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ];
	403	m_data->GetAllFormats( array );
	404
	405	#if 0
	406	/* primary selection or clipboard */
	407	Atom clipboard = m_usePrimary ? (Atom) 1 // 1 = primary selection
	408	: g_clipboardAtom;
	409	#endif // 0
	410
	411
	412	for (size_t i = 0; i < m_data->GetFormatCount(); i++)
	413	{
	414	wxLogTrace( TRACE_CLIPBOARD,
	415	wxT("wxClipboard now supports atom %s"),
	416	array[i].GetId().c_str() );
	417
	418	#if 0
	419	gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget),
	420	clipboard,
	421	array[i],
	422	0 ); /* what is info ? */
	423	#endif
	424	}
	425
	426	delete[] array;
	427
	428	#if 0
	429	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	430	"selection_get",
	431	GTK_SIGNAL_FUNC(selection_handler),
	432	(gpointer) NULL );
	433	#endif
	434
	435	#if wxUSE_THREADS
	436	/* disable GUI threads */
	437	#endif
	438
	439	bool res = false;
	440	#if 0
	441	/* Tell the world we offer clipboard data */
	442	res = (gtk_selection_owner_set( m_clipboardWidget,
	443	clipboard,
	444	(guint32) GDK_CURRENT_TIME ));
	445	#endif
	446
	447	if (m_usePrimary)
	448	m_ownsPrimarySelection = res;
	449	else
	450	m_ownsClipboard = res;
	451
	452	#if wxUSE_THREADS
	453	/* re-enable GUI threads */
	454	#endif
	455
	456	return res;
	457	#endif
	458	}
	459
	460	void wxClipboard::Close()
	461	{
	462	wxCHECK_RET( m_open, wxT("clipboard not open") );
	463
	464	m_open = false;
	465	}
	466
	467	bool wxClipboard::IsOpened() const
	468	{
	469	return m_open;
	470	}
	471
	472	bool wxClipboard::IsSupported( const wxDataFormat& format )
	473	{
	474	/* reentrance problems */
	475	if (m_waiting) return false;
	476
	477	/* store requested format to be asked for by callbacks */
	478	m_targetRequested = format;
	479
	480	#if 0
	481	wxLogTrace( TRACE_CLIPBOARD,
	482	wxT("wxClipboard:IsSupported: requested format: %s"),
	483	format.GetId().c_str() );
	484	#endif
	485
	486	wxCHECK_MSG( m_targetRequested, false, wxT("invalid clipboard format") );
	487
	488	m_formatSupported = false;
	489
	490	/* perform query. this will set m_formatSupported to
	491	true if m_targetRequested is supported.
	492	also, we have to wait for the "answer" from the
	493	clipboard owner which is an asynchronous process.
	494	therefore we set m_waiting = true here and wait
	495	until the callback "targets_selection_received"
	496	sets it to false */
	497
	498	m_waiting = true;
	499
	500	#if 0
	501	gtk_selection_convert( m_targetsWidget,
	502	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	503	: g_clipboardAtom,
	504	g_targetsAtom,
	505	(guint32) GDK_CURRENT_TIME );
	506
	507	while (m_waiting) gtk_main_iteration();
	508	#endif
	509
	510	if (!m_formatSupported) return false;
	511
	512	return true;
	513	}
	514
	515	bool wxClipboard::GetData( wxDataObject& data )
	516	{
	517	wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
	518
	519	/* get formats from wxDataObjects */
	520	wxDataFormat *array = new wxDataFormat[ data.GetFormatCount() ];
	521	data.GetAllFormats( array );
	522
	523	for (size_t i = 0; i < data.GetFormatCount(); i++)
	524	{
	525	wxDataFormat format( array[i] );
	526
	527	wxLogTrace( TRACE_CLIPBOARD,
	528	wxT("wxClipboard::GetData: requested format: %s"),
	529	format.GetId().c_str() );
	530
	531	/* is data supported by clipboard ? */
	532
	533	/* store requested format to be asked for by callbacks */
	534	m_targetRequested = format;
	535
	536	wxCHECK_MSG( m_targetRequested, false, wxT("invalid clipboard format") );
	537
	538	m_formatSupported = false;
	539
	540	/* perform query. this will set m_formatSupported to
	541	true if m_targetRequested is supported.
	542	also, we have to wait for the "answer" from the
	543	clipboard owner which is an asynchronous process.
	544	therefore we set m_waiting = true here and wait
	545	until the callback "targets_selection_received"
	546	sets it to false */
	547
	548	m_waiting = true;
	549
	550	#if 0
	551	gtk_selection_convert( m_targetsWidget,
	552	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	553	: g_clipboardAtom,
	554	g_targetsAtom,
	555	(guint32) GDK_CURRENT_TIME );
	556
	557	while (m_waiting) gtk_main_iteration();
	558	#endif
	559
	560	if (!m_formatSupported) continue;
	561
	562	/* store pointer to data object to be filled up by callbacks */
	563	m_receivedData = &data;
	564
	565	/* store requested format to be asked for by callbacks */
	566	m_targetRequested = format;
	567
	568	wxCHECK_MSG( m_targetRequested, false, wxT("invalid clipboard format") );
	569
	570	/* start query */
	571	m_formatSupported = false;
	572
	573	/* ask for clipboard contents. this will set
	574	m_formatSupported to true if m_targetRequested
	575	is supported.
	576	also, we have to wait for the "answer" from the
	577	clipboard owner which is an asynchronous process.
	578	therefore we set m_waiting = true here and wait
	579	until the callback "targets_selection_received"
	580	sets it to false */
	581
	582	m_waiting = true;
	583
	584	wxLogTrace( TRACE_CLIPBOARD,
	585	wxT("wxClipboard::GetData: format found, start convert") );
	586
	587	#if 0
	588	gtk_selection_convert( m_clipboardWidget,
	589	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	590	: g_clipboardAtom,
	591	m_targetRequested,
	592	(guint32) GDK_CURRENT_TIME );
	593
	594	while (m_waiting) gtk_main_iteration();
	595	#endif
	596
	597	/* this is a true error as we checked for the presence of such data before */
	598	wxCHECK_MSG( m_formatSupported, false, wxT("error retrieving data from clipboard") );
	599
	600	/* return success */
	601	delete[] array;
	602	return true;
	603	}
	604
	605	wxLogTrace( TRACE_CLIPBOARD,
	606	wxT("wxClipboard::GetData: format not found") );
	607
	608	/* return failure */
	609	delete[] array;
	610	return false;
	611	}
	612
	613	#endif
	614	// wxUSE_CLIPBOARD