src/x11/clipbrd.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/x11/clipbrd.cpp
// Purpose:     Clipboard functionality
// Author:      Robert Roebling
// Created:
// 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 (notice that we still use it
// even in release build if the compiler doesn't support variadic macros)
#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 = wxT("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,
                            wxT("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" ));

            wxDELETE(wxTheClipboard->m_data);
        }
    }

    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 = NULL;
    m_receivedData = 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;
}

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( 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( NULL, GDK_SELECTION_PRIMARY,
                                     (guint32) GDK_CURRENT_TIME );

            while (m_waiting) gtk_main_iteration();
        }
#endif

        wxDELETE(m_data);

#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	// Copyright: (c) Robert Roebling
	7	// Licence: wxWindows licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10	// for compilers that support precompilation, includes "wx.h".
	11	#include "wx/wxprec.h"
	12
	13	#if wxUSE_CLIPBOARD
	14
	15	#include "wx/clipbrd.h"
	16
	17	#ifndef WX_PRECOMP
	18	#include "wx/log.h"
	19	#include "wx/utils.h"
	20	#include "wx/dataobj.h"
	21	#endif
	22
	23	#include "wx/x11/private.h"
	24
	25	//-----------------------------------------------------------------------------
	26	// data
	27	//-----------------------------------------------------------------------------
	28
	29	#if !wxUSE_NANOX
	30	Atom g_clipboardAtom = 0;
	31	Atom g_targetsAtom = 0;
	32	#endif
	33
	34	// avoid warnings about unused static variable (notice that we still use it
	35	// even in release build if the compiler doesn't support variadic macros)
	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 = wxT("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	wxT("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	wxDELETE(wxTheClipboard->m_data);
	218	}
	219	}
	220
	221	wxTheClipboard->m_waiting = false;
	222	return TRUE;
	223	}
	224
	225	//-----------------------------------------------------------------------------
	226	// selection handler for supplying data
	227	//-----------------------------------------------------------------------------
	228
	229	static void
	230	selection_handler( GtkWidget *WXUNUSED(widget),
	231	GtkSelectionData *selection_data,
	232	guint WXUNUSED(info),
	233	guint WXUNUSED(time),
	234	gpointer WXUNUSED(data) )
	235	{
	236	if (!wxTheClipboard) return;
	237
	238	if (!wxTheClipboard->m_data) return;
	239
	240	wxDataObject *data = wxTheClipboard->m_data;
	241
	242	wxDataFormat format( selection_data->target );
	243
	244	if (!data->IsSupportedFormat( format )) return;
	245
	246	int size = data->GetDataSize( format );
	247
	248	if (size == 0) return;
	249
	250	void *d = malloc(size);
	251
	252	data->GetDataHere( selection_data->target, d );
	253
	254	// transform Unicode text into multibyte before putting it on clipboard
	255	#if wxUSE_UNICODE
	256	if ( format.GetType() == wxDF_TEXT \|\| format.GetType() == wxDF_UNICODETEXT)
	257	{
	258	const wchar_t wstr = (const wchar_t )d;
	259	size_t len = wxConvCurrent->WC2MB(NULL, wstr, 0);
	260	char *str = malloc(len + 1);
	261	wxConvCurrent->WC2MB(str, wstr, len);
	262	str[len] = '\0';
	263
	264	free(d);
	265	d = str;
	266	}
	267	#endif // wxUSE_UNICODE
	268
	269	gtk_selection_data_set(
	270	selection_data,
	271	GDK_SELECTION_TYPE_STRING,
	272	8*sizeof(gchar),
	273	(unsigned char*) d,
	274	size );
	275
	276	free(d);
	277	}
	278
	279	#endif
	280
	281	//-----------------------------------------------------------------------------
	282	// wxClipboard
	283	//-----------------------------------------------------------------------------
	284
	285	IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
	286
	287	wxClipboard::wxClipboard()
	288	{
	289	m_open = false;
	290
	291	m_ownsClipboard = false;
	292	m_ownsPrimarySelection = false;
	293
	294	m_data = NULL;
	295	m_receivedData = NULL;
	296
	297	/* we use m_targetsWidget to query what formats are available */
	298
	299	/* we use m_clipboardWidget to get and to offer data */
	300	#if !wxUSE_NANOX
	301	if (!g_clipboardAtom) g_clipboardAtom = XInternAtom( (Display*) wxGetDisplay(), "CLIPBOARD", False );
	302	if (!g_targetsAtom) g_targetsAtom = XInternAtom( (Display*) wxGetDisplay(), "TARGETS", False );
	303	#endif
	304
	305	m_formatSupported = false;
	306	m_targetRequested = 0;
	307	}
	308
	309	wxClipboard::~wxClipboard()
	310	{
	311	Clear();
	312
	313	// if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
	314	// if (m_targetsWidget) gtk_widget_destroy( m_targetsWidget );
	315	}
	316
	317	void wxClipboard::Clear()
	318	{
	319	if (m_data)
	320	{
	321	#if wxUSE_THREADS
	322	/* disable GUI threads */
	323	#endif
	324
	325	/* As we have data we also own the clipboard. Once we no longer own
	326	it, clear_selection is called which will set m_data to zero */
	327	#if 0
	328	if (gdk_selection_owner_get( g_clipboardAtom ) == m_clipboardWidget->window)
	329	{
	330	m_waiting = true;
	331
	332	gtk_selection_owner_set( NULL, g_clipboardAtom,
	333	(guint32) GDK_CURRENT_TIME );
	334
	335	while (m_waiting) gtk_main_iteration();
	336	}
	337
	338	if (gdk_selection_owner_get( GDK_SELECTION_PRIMARY ) == m_clipboardWidget->window)
	339	{
	340	m_waiting = true;
	341
	342	gtk_selection_owner_set( NULL, GDK_SELECTION_PRIMARY,
	343	(guint32) GDK_CURRENT_TIME );
	344
	345	while (m_waiting) gtk_main_iteration();
	346	}
	347	#endif
	348
	349	wxDELETE(m_data);
	350
	351	#if wxUSE_THREADS
	352	/* re-enable GUI threads */
	353	#endif
	354	}
	355
	356	m_targetRequested = 0;
	357	m_formatSupported = false;
	358	}
	359
	360	bool wxClipboard::Open()
	361	{
	362	wxCHECK_MSG( !m_open, false, wxT("clipboard already open") );
	363
	364	m_open = true;
	365
	366	return true;
	367	}
	368
	369	bool wxClipboard::SetData( wxDataObject *data )
	370	{
	371	wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
	372
	373	wxCHECK_MSG( data, false, wxT("data is invalid") );
	374
	375	Clear();
	376
	377	return AddData( data );
	378	}
	379
	380	bool wxClipboard::AddData( wxDataObject *data )
	381	{
	382	#if wxUSE_NANOX
	383	return false;
	384	#else
	385	wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
	386
	387	wxCHECK_MSG( data, false, wxT("data is invalid") );
	388
	389	/* we can only store one wxDataObject */
	390	Clear();
	391
	392	m_data = data;
	393
	394	/* get formats from wxDataObjects */
	395	wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ];
	396	m_data->GetAllFormats( array );
	397
	398	#if 0
	399	/* primary selection or clipboard */
	400	Atom clipboard = m_usePrimary ? (Atom) 1 // 1 = primary selection
	401	: g_clipboardAtom;
	402	#endif // 0
	403
	404
	405	for (size_t i = 0; i < m_data->GetFormatCount(); i++)
	406	{
	407	wxLogTrace( TRACE_CLIPBOARD,
	408	wxT("wxClipboard now supports atom %s"),
	409	array[i].GetId().c_str() );
	410
	411	#if 0
	412	gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget),
	413	clipboard,
	414	array[i],
	415	0 ); /* what is info ? */
	416	#endif
	417	}
	418
	419	delete[] array;
	420
	421	#if 0
	422	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	423	"selection_get",
	424	GTK_SIGNAL_FUNC(selection_handler),
	425	(gpointer) NULL );
	426	#endif
	427
	428	#if wxUSE_THREADS
	429	/* disable GUI threads */
	430	#endif
	431
	432	bool res = false;
	433	#if 0
	434	/* Tell the world we offer clipboard data */
	435	res = (gtk_selection_owner_set( m_clipboardWidget,
	436	clipboard,
	437	(guint32) GDK_CURRENT_TIME ));
	438	#endif
	439
	440	if (m_usePrimary)
	441	m_ownsPrimarySelection = res;
	442	else
	443	m_ownsClipboard = res;
	444
	445	#if wxUSE_THREADS
	446	/* re-enable GUI threads */
	447	#endif
	448
	449	return res;
	450	#endif
	451	}
	452
	453	void wxClipboard::Close()
	454	{
	455	wxCHECK_RET( m_open, wxT("clipboard not open") );
	456
	457	m_open = false;
	458	}
	459
	460	bool wxClipboard::IsOpened() const
	461	{
	462	return m_open;
	463	}
	464
	465	bool wxClipboard::IsSupported( const wxDataFormat& format )
	466	{
	467	/* reentrance problems */
	468	if (m_waiting) return false;
	469
	470	/* store requested format to be asked for by callbacks */
	471	m_targetRequested = format;
	472
	473	#if 0
	474	wxLogTrace( TRACE_CLIPBOARD,
	475	wxT("wxClipboard:IsSupported: requested format: %s"),
	476	format.GetId().c_str() );
	477	#endif
	478
	479	wxCHECK_MSG( m_targetRequested, false, wxT("invalid clipboard format") );
	480
	481	m_formatSupported = false;
	482
	483	/* perform query. this will set m_formatSupported to
	484	true if m_targetRequested is supported.
	485	also, we have to wait for the "answer" from the
	486	clipboard owner which is an asynchronous process.
	487	therefore we set m_waiting = true here and wait
	488	until the callback "targets_selection_received"
	489	sets it to false */
	490
	491	m_waiting = true;
	492
	493	#if 0
	494	gtk_selection_convert( m_targetsWidget,
	495	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	496	: g_clipboardAtom,
	497	g_targetsAtom,
	498	(guint32) GDK_CURRENT_TIME );
	499
	500	while (m_waiting) gtk_main_iteration();
	501	#endif
	502
	503	if (!m_formatSupported) return false;
	504
	505	return true;
	506	}
	507
	508	bool wxClipboard::GetData( wxDataObject& data )
	509	{
	510	wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
	511
	512	/* get formats from wxDataObjects */
	513	wxDataFormat *array = new wxDataFormat[ data.GetFormatCount() ];
	514	data.GetAllFormats( array );
	515
	516	for (size_t i = 0; i < data.GetFormatCount(); i++)
	517	{
	518	wxDataFormat format( array[i] );
	519
	520	wxLogTrace( TRACE_CLIPBOARD,
	521	wxT("wxClipboard::GetData: requested format: %s"),
	522	format.GetId().c_str() );
	523
	524	/* is data supported by clipboard ? */
	525
	526	/* store requested format to be asked for by callbacks */
	527	m_targetRequested = format;
	528
	529	wxCHECK_MSG( m_targetRequested, false, wxT("invalid clipboard format") );
	530
	531	m_formatSupported = false;
	532
	533	/* perform query. this will set m_formatSupported to
	534	true if m_targetRequested is supported.
	535	also, we have to wait for the "answer" from the
	536	clipboard owner which is an asynchronous process.
	537	therefore we set m_waiting = true here and wait
	538	until the callback "targets_selection_received"
	539	sets it to false */
	540
	541	m_waiting = true;
	542
	543	#if 0
	544	gtk_selection_convert( m_targetsWidget,
	545	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	546	: g_clipboardAtom,
	547	g_targetsAtom,
	548	(guint32) GDK_CURRENT_TIME );
	549
	550	while (m_waiting) gtk_main_iteration();
	551	#endif
	552
	553	if (!m_formatSupported) continue;
	554
	555	/* store pointer to data object to be filled up by callbacks */
	556	m_receivedData = &data;
	557
	558	/* store requested format to be asked for by callbacks */
	559	m_targetRequested = format;
	560
	561	wxCHECK_MSG( m_targetRequested, false, wxT("invalid clipboard format") );
	562
	563	/* start query */
	564	m_formatSupported = false;
	565
	566	/* ask for clipboard contents. this will set
	567	m_formatSupported to true if m_targetRequested
	568	is supported.
	569	also, we have to wait for the "answer" from the
	570	clipboard owner which is an asynchronous process.
	571	therefore we set m_waiting = true here and wait
	572	until the callback "targets_selection_received"
	573	sets it to false */
	574
	575	m_waiting = true;
	576
	577	wxLogTrace( TRACE_CLIPBOARD,
	578	wxT("wxClipboard::GetData: format found, start convert") );
	579
	580	#if 0
	581	gtk_selection_convert( m_clipboardWidget,
	582	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	583	: g_clipboardAtom,
	584	m_targetRequested,
	585	(guint32) GDK_CURRENT_TIME );
	586
	587	while (m_waiting) gtk_main_iteration();
	588	#endif
	589
	590	/* this is a true error as we checked for the presence of such data before */
	591	wxCHECK_MSG( m_formatSupported, false, wxT("error retrieving data from clipboard") );
	592
	593	/* return success */
	594	delete[] array;
	595	return true;
	596	}
	597
	598	wxLogTrace( TRACE_CLIPBOARD,
	599	wxT("wxClipboard::GetData: format not found") );
	600
	601	/* return failure */
	602	delete[] array;
	603	return false;
	604	}
	605
	606	#endif
	607	// wxUSE_CLIPBOARD