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"
#endif

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