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

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