src/x11/clipbrd.cpp

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

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

#if wxUSE_CLIPBOARD

#include "wx/clipbrd.h"

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

#include "wx/x11/private.h"

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

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

// avoid warnings about unused static variable (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 = _T("clipboard");

#endif // __WXDEBUG__

//-----------------------------------------------------------------------------
// reminder
//-----------------------------------------------------------------------------

/* The contents of a selection are returned in a GtkSelectionData
   structure. selection/target identify the request.
   type specifies the type of the return; if length < 0, and
   the data should be ignored. This structure has object semantics -
   no fields should be modified directly, they should not be created
   directly, and pointers to them should not be stored beyond the duration of
   a callback. (If the last is changed, we'll need to add reference
   counting)

struct _GtkSelectionData
{
  GdkAtom selection;
  GdkAtom target;
  GdkAtom type;
  gint    format;
  guchar *data;
  gint    length;
};

*/

//-----------------------------------------------------------------------------
// "selection_received" for targets
//-----------------------------------------------------------------------------

#if 0

static void
targets_selection_received( GtkWidget *WXUNUSED(widget),
                            GtkSelectionData *selection_data,
#if (GTK_MINOR_VERSION > 0)
                            guint32 WXUNUSED(time),
#endif
                            wxClipboard *clipboard )
{
    if ( wxTheClipboard && selection_data->length > 0 )
    {
        /* make sure we got the data in the correct form */
        GdkAtom type = selection_data->type;
        if ( type != GDK_SELECTION_TYPE_ATOM )
        {
            if ( strcmp(gdk_atom_name(type), "TARGETS") )
            {
                wxLogTrace( TRACE_CLIPBOARD,
                            _T("got unsupported clipboard target") );

                clipboard->m_waiting = false;
                return;
            }
        }

#ifdef __WXDEBUG__
        wxDataFormat clip( selection_data->selection );
        wxLogTrace( TRACE_CLIPBOARD,
                    wxT("selection received for targets, clipboard %s"),
                    clip.GetId().c_str() );
#endif // __WXDEBUG__

        // the atoms we received, holding a list of targets (= formats)
        GdkAtom *atoms = (GdkAtom *)selection_data->data;

        for (unsigned int i=0; i<selection_data->length/sizeof(GdkAtom); i++)
        {
            wxDataFormat format( atoms[i] );

            wxLogTrace( TRACE_CLIPBOARD,
                        wxT("selection received for targets, format %s"),
                        format.GetId().c_str() );

            if (format == clipboard->m_targetRequested)
            {
                clipboard->m_waiting = false;
                clipboard->m_formatSupported = true;
                return;
            }
        }
    }

    clipboard->m_waiting = false;
}

//-----------------------------------------------------------------------------
// "selection_received" for the actual data
//-----------------------------------------------------------------------------

static void
selection_received( GtkWidget *WXUNUSED(widget),
                    GtkSelectionData *selection_data,
#if (GTK_MINOR_VERSION > 0)
                    guint32 WXUNUSED(time),
#endif
                    wxClipboard *clipboard )
{
    if (!wxTheClipboard)
    {
        clipboard->m_waiting = false;
        return;
    }

    wxDataObject *data_object = clipboard->m_receivedData;

    if (!data_object)
    {
        clipboard->m_waiting = false;
        return;
    }

    if (selection_data->length <= 0)
    {
        clipboard->m_waiting = false;
        return;
    }

    wxDataFormat format( selection_data->target );

    /* make sure we got the data in the correct format */
    if (!data_object->IsSupportedFormat( format ) )
    {
        clipboard->m_waiting = false;
        return;
    }

    /* make sure we got the data in the correct form (selection type).
       if so, copy data to target object */
    if (selection_data->type != GDK_SELECTION_TYPE_STRING)
    {
        clipboard->m_waiting = false;
        return;
    }

    data_object->SetData( format, (size_t) selection_data->length, (const char*) selection_data->data );

    wxTheClipboard->m_formatSupported = true;
    clipboard->m_waiting = false;
}

//-----------------------------------------------------------------------------
// "selection_clear"
//-----------------------------------------------------------------------------

static gint
selection_clear_clip( GtkWidget *WXUNUSED(widget), GdkEventSelection *event )
{
    if (!wxTheClipboard) return TRUE;

    if (event->selection == GDK_SELECTION_PRIMARY)
    {
        wxTheClipboard->m_ownsPrimarySelection = false;
    }
    else
    if (event->selection == g_clipboardAtom)
    {
        wxTheClipboard->m_ownsClipboard = false;
    }
    else
    {
        wxTheClipboard->m_waiting = false;
        return FALSE;
    }

    if ((!wxTheClipboard->m_ownsPrimarySelection) &&
        (!wxTheClipboard->m_ownsClipboard))
    {
        /* the clipboard is no longer in our hands. we can the delete clipboard data. */
        if (wxTheClipboard->m_data)
        {
            wxLogTrace(TRACE_CLIPBOARD, wxT("wxClipboard will get cleared" ));

            delete wxTheClipboard->m_data;
            wxTheClipboard->m_data = (wxDataObject*) NULL;
        }
    }

    wxTheClipboard->m_waiting = false;
    return TRUE;
}

//-----------------------------------------------------------------------------
// selection handler for supplying data
//-----------------------------------------------------------------------------

static void
selection_handler( GtkWidget *WXUNUSED(widget),
                   GtkSelectionData *selection_data,
                   guint WXUNUSED(info),
                   guint WXUNUSED(time),
                   gpointer WXUNUSED(data) )
{
    if (!wxTheClipboard) return;

    if (!wxTheClipboard->m_data) return;

    wxDataObject *data = wxTheClipboard->m_data;

    wxDataFormat format( selection_data->target );

    if (!data->IsSupportedFormat( format )) return;

    int size = data->GetDataSize( format );

    if (size == 0) return;

    void *d = malloc(size);

    data->GetDataHere( selection_data->target, d );

    // transform Unicode text into multibyte before putting it on clipboard
#if wxUSE_UNICODE
    if ( format.GetType() == wxDF_TEXT || format.GetType() == wxDF_UNICODETEXT)
    {
        const wchar_t *wstr = (const wchar_t *)d;
        size_t len = wxConvCurrent->WC2MB(NULL, wstr, 0);
        char *str = malloc(len + 1);
        wxConvCurrent->WC2MB(str, wstr, len);
        str[len] = '\0';

        free(d);
        d = str;
    }
#endif // wxUSE_UNICODE

    gtk_selection_data_set(
        selection_data,
        GDK_SELECTION_TYPE_STRING,
        8*sizeof(gchar),
        (unsigned char*) d,
        size );

    free(d);
}

#endif

//-----------------------------------------------------------------------------
// wxClipboard
//-----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)

wxClipboard::wxClipboard()
{
    m_open = false;

    m_ownsClipboard = false;
    m_ownsPrimarySelection = false;

    m_data = (wxDataObject*) NULL;
    m_receivedData = (wxDataObject*) NULL;

    /* we use m_targetsWidget to query what formats are available */

    /* we use m_clipboardWidget to get and to offer data */
#if !wxUSE_NANOX
    if (!g_clipboardAtom) g_clipboardAtom = XInternAtom( (Display*) wxGetDisplay(), "CLIPBOARD", False );
    if (!g_targetsAtom) g_targetsAtom = XInternAtom( (Display*) wxGetDisplay(), "TARGETS", False );
#endif

    m_formatSupported = false;
    m_targetRequested = 0;

    m_usePrimary = false;
}

wxClipboard::~wxClipboard()
{
    Clear();

//    if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
//    if (m_targetsWidget) gtk_widget_destroy( m_targetsWidget );
}

void wxClipboard::Clear()
{
    if (m_data)
    {
#if wxUSE_THREADS
        /* disable GUI threads */
#endif

        /*  As we have data we also own the clipboard. Once we no longer own
            it, clear_selection is called which will set m_data to zero */
#if 0
        if (gdk_selection_owner_get( g_clipboardAtom ) == m_clipboardWidget->window)
        {
            m_waiting = true;

            gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom,
                                     (guint32) GDK_CURRENT_TIME );

            while (m_waiting) gtk_main_iteration();
        }

        if (gdk_selection_owner_get( GDK_SELECTION_PRIMARY ) == m_clipboardWidget->window)
        {
            m_waiting = true;

            gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY,
                                     (guint32) GDK_CURRENT_TIME );

            while (m_waiting) gtk_main_iteration();
        }
#endif

        if (m_data)
        {
            delete m_data;
            m_data = (wxDataObject*) NULL;
        }

#if wxUSE_THREADS
        /* re-enable GUI threads */
#endif
    }

    m_targetRequested = 0;
    m_formatSupported = false;
}

bool wxClipboard::Open()
{
    wxCHECK_MSG( !m_open, false, wxT("clipboard already open") );

    m_open = true;

    return true;
}

bool wxClipboard::SetData( wxDataObject *data )
{
    wxCHECK_MSG( m_open, false, wxT("clipboard not open") );

    wxCHECK_MSG( data, false, wxT("data is invalid") );

    Clear();

    return AddData( data );
}

bool wxClipboard::AddData( wxDataObject *data )
{
#if wxUSE_NANOX
    return false;
#else
    wxCHECK_MSG( m_open, false, wxT("clipboard not open") );

    wxCHECK_MSG( data, false, wxT("data is invalid") );

    /* we can only store one wxDataObject */
    Clear();

    m_data = data;

    /* get formats from wxDataObjects */
    wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ];
    m_data->GetAllFormats( array );

#if 0
    /* primary selection or clipboard */
    Atom clipboard = m_usePrimary ? (Atom) 1  // 1 = primary selection
                                  : g_clipboardAtom;
#endif // 0


    for (size_t i = 0; i < m_data->GetFormatCount(); i++)
    {
        wxLogTrace( TRACE_CLIPBOARD,
                    wxT("wxClipboard now supports atom %s"),
                    array[i].GetId().c_str() );

#if 0
        gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget),
                                  clipboard,
                                  array[i],
                                  0 );  /* what is info ? */
#endif
    }

    delete[] array;

#if 0
    gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
                        "selection_get",
                        GTK_SIGNAL_FUNC(selection_handler),
                        (gpointer) NULL );
#endif

#if wxUSE_THREADS
    /* disable GUI threads */
#endif

    bool res = false;
#if 0
    /* Tell the world we offer clipboard data */
    res = (gtk_selection_owner_set( m_clipboardWidget,
                                         clipboard,
                                         (guint32) GDK_CURRENT_TIME ));
#endif

    if (m_usePrimary)
        m_ownsPrimarySelection = res;
    else
        m_ownsClipboard = res;

#if wxUSE_THREADS
    /* re-enable GUI threads */
#endif

    return res;
#endif
}

void wxClipboard::Close()
{
    wxCHECK_RET( m_open, wxT("clipboard not open") );

    m_open = false;
}

bool wxClipboard::IsOpened() const
{
    return m_open;
}

bool wxClipboard::IsSupported( const wxDataFormat& format )
{
    /* reentrance problems */
    if (m_waiting) return false;

    /* store requested format to be asked for by callbacks */
    m_targetRequested = format;

#if 0
    wxLogTrace( TRACE_CLIPBOARD,
                wxT("wxClipboard:IsSupported: requested format: %s"),
                format.GetId().c_str() );
#endif

    wxCHECK_MSG( m_targetRequested, false, wxT("invalid clipboard format") );

    m_formatSupported = false;

    /* perform query. this will set m_formatSupported to
       true if m_targetRequested is supported.
       also, we have to wait for the "answer" from the
       clipboard owner which is an asynchronous process.
       therefore we set m_waiting = true here and wait
       until the callback "targets_selection_received"
       sets it to false */

    m_waiting = true;

#if 0
    gtk_selection_convert( m_targetsWidget,
                           m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
                                        : g_clipboardAtom,
                           g_targetsAtom,
                           (guint32) GDK_CURRENT_TIME );

    while (m_waiting) gtk_main_iteration();
#endif

    if (!m_formatSupported) return false;

    return true;
}

bool wxClipboard::GetData( wxDataObject& data )
{
    wxCHECK_MSG( m_open, false, wxT("clipboard not open") );

    /* get formats from wxDataObjects */
    wxDataFormat *array = new wxDataFormat[ data.GetFormatCount() ];
    data.GetAllFormats( array );

    for (size_t i = 0; i < data.GetFormatCount(); i++)
    {
        wxDataFormat format( array[i] );

        wxLogTrace( TRACE_CLIPBOARD,
                    wxT("wxClipboard::GetData: requested format: %s"),
                    format.GetId().c_str() );

        /* is data supported by clipboard ? */

        /* store requested format to be asked for by callbacks */
        m_targetRequested = format;

        wxCHECK_MSG( m_targetRequested, false, wxT("invalid clipboard format") );

        m_formatSupported = false;

       /* perform query. this will set m_formatSupported to
          true if m_targetRequested is supported.
          also, we have to wait for the "answer" from the
          clipboard owner which is an asynchronous process.
          therefore we set m_waiting = true here and wait
          until the callback "targets_selection_received"
          sets it to false */

        m_waiting = true;

#if 0
        gtk_selection_convert( m_targetsWidget,
                           m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
                                        : g_clipboardAtom,
                           g_targetsAtom,
                           (guint32) GDK_CURRENT_TIME );

        while (m_waiting) gtk_main_iteration();
#endif

        if (!m_formatSupported) continue;

        /* store pointer to data object to be filled up by callbacks */
        m_receivedData = &data;

        /* store requested format to be asked for by callbacks */
        m_targetRequested = format;

        wxCHECK_MSG( m_targetRequested, false, wxT("invalid clipboard format") );

        /* start query */
        m_formatSupported = false;

        /* ask for clipboard contents.  this will set
           m_formatSupported to true if m_targetRequested
           is supported.
           also, we have to wait for the "answer" from the
           clipboard owner which is an asynchronous process.
           therefore we set m_waiting = true here and wait
           until the callback "targets_selection_received"
           sets it to false */

        m_waiting = true;

        wxLogTrace( TRACE_CLIPBOARD,
                    wxT("wxClipboard::GetData: format found, start convert") );

#if 0
        gtk_selection_convert( m_clipboardWidget,
                               m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
                                            : g_clipboardAtom,
                               m_targetRequested,
                               (guint32) GDK_CURRENT_TIME );

        while (m_waiting) gtk_main_iteration();
#endif

        /* this is a true error as we checked for the presence of such data before */
        wxCHECK_MSG( m_formatSupported, false, wxT("error retrieving data from clipboard") );

        /* return success */
        delete[] array;
        return true;
    }

    wxLogTrace( TRACE_CLIPBOARD,
                wxT("wxClipboard::GetData: format not found") );

    /* return failure */
    delete[] array;
    return false;
}

#endif
  // wxUSE_CLIPBOARD
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: src/x11/clipbrd.cpp
	3	// Purpose: Clipboard functionality
	4	// Author: Robert Roebling
	5	// Created:
	6	// RCS-ID: $Id$
	7	// Copyright: (c) Robert Roebling
	8	// Licence: wxWindows licence
	9	/////////////////////////////////////////////////////////////////////////////
	10
	11	// for compilers that support precompilation, includes "wx.h".
	12	#include "wx/wxprec.h"
	13
	14	#if wxUSE_CLIPBOARD
	15
	16	#include "wx/clipbrd.h"
	17
	18	#ifndef WX_PRECOMP
	19	#include "wx/log.h"
	20	#include "wx/utils.h"
	21	#include "wx/dataobj.h"
	22	#endif
	23
	24	#include "wx/x11/private.h"
	25
	26	//-----------------------------------------------------------------------------
	27	// data
	28	//-----------------------------------------------------------------------------
	29
	30	#if !wxUSE_NANOX
	31	Atom g_clipboardAtom = 0;
	32	Atom g_targetsAtom = 0;
	33	#endif
	34
	35	// avoid warnings about unused static variable (notice that we still use it
	36	// even in release build if the compiler doesn't support variadic macros)
	37	#if defined(__WXDEBUG__) \|\| !defined(HAVE_VARIADIC_MACROS)
	38
	39	// the trace mask we use with wxLogTrace() - call
	40	// wxLog::AddTraceMask(TRACE_CLIPBOARD) to enable the trace messages from here
	41	// (there will be a lot of them!)
	42	static const wxChar *TRACE_CLIPBOARD = _T("clipboard");
	43
	44	#endif // __WXDEBUG__
	45
	46	//-----------------------------------------------------------------------------
	47	// reminder
	48	//-----------------------------------------------------------------------------
	49
	50	/* The contents of a selection are returned in a GtkSelectionData
	51	structure. selection/target identify the request.
	52	type specifies the type of the return; if length < 0, and
	53	the data should be ignored. This structure has object semantics -
	54	no fields should be modified directly, they should not be created
	55	directly, and pointers to them should not be stored beyond the duration of
	56	a callback. (If the last is changed, we'll need to add reference
	57	counting)
	58
	59	struct _GtkSelectionData
	60	{
	61	GdkAtom selection;
	62	GdkAtom target;
	63	GdkAtom type;
	64	gint format;
	65	guchar *data;
	66	gint length;
	67	};
	68
	69	*/
	70
	71	//-----------------------------------------------------------------------------
	72	// "selection_received" for targets
	73	//-----------------------------------------------------------------------------
	74
	75	#if 0
	76
	77	static void
	78	targets_selection_received( GtkWidget *WXUNUSED(widget),
	79	GtkSelectionData *selection_data,
	80	#if (GTK_MINOR_VERSION > 0)
	81	guint32 WXUNUSED(time),
	82	#endif
	83	wxClipboard *clipboard )
	84	{
	85	if ( wxTheClipboard && selection_data->length > 0 )
	86	{
	87	/* make sure we got the data in the correct form */
	88	GdkAtom type = selection_data->type;
	89	if ( type != GDK_SELECTION_TYPE_ATOM )
	90	{
	91	if ( strcmp(gdk_atom_name(type), "TARGETS") )
	92	{
	93	wxLogTrace( TRACE_CLIPBOARD,
	94	_T("got unsupported clipboard target") );
	95
	96	clipboard->m_waiting = false;
	97	return;
	98	}
	99	}
	100
	101	#ifdef __WXDEBUG__
	102	wxDataFormat clip( selection_data->selection );
	103	wxLogTrace( TRACE_CLIPBOARD,
	104	wxT("selection received for targets, clipboard %s"),
	105	clip.GetId().c_str() );
	106	#endif // __WXDEBUG__
	107
	108	// the atoms we received, holding a list of targets (= formats)
	109	GdkAtom atoms = (GdkAtom )selection_data->data;
	110
	111	for (unsigned int i=0; i<selection_data->length/sizeof(GdkAtom); i++)
	112	{
	113	wxDataFormat format( atoms[i] );
	114
	115	wxLogTrace( TRACE_CLIPBOARD,
	116	wxT("selection received for targets, format %s"),
	117	format.GetId().c_str() );
	118
	119	if (format == clipboard->m_targetRequested)
	120	{
	121	clipboard->m_waiting = false;
	122	clipboard->m_formatSupported = true;
	123	return;
	124	}
	125	}
	126	}
	127
	128	clipboard->m_waiting = false;
	129	}
	130
	131	//-----------------------------------------------------------------------------
	132	// "selection_received" for the actual data
	133	//-----------------------------------------------------------------------------
	134
	135	static void
	136	selection_received( GtkWidget *WXUNUSED(widget),
	137	GtkSelectionData *selection_data,
	138	#if (GTK_MINOR_VERSION > 0)
	139	guint32 WXUNUSED(time),
	140	#endif
	141	wxClipboard *clipboard )
	142	{
	143	if (!wxTheClipboard)
	144	{
	145	clipboard->m_waiting = false;
	146	return;
	147	}
	148
	149	wxDataObject *data_object = clipboard->m_receivedData;
	150
	151	if (!data_object)
	152	{
	153	clipboard->m_waiting = false;
	154	return;
	155	}
	156
	157	if (selection_data->length <= 0)
	158	{
	159	clipboard->m_waiting = false;
	160	return;
	161	}
	162
	163	wxDataFormat format( selection_data->target );
	164
	165	/* make sure we got the data in the correct format */
	166	if (!data_object->IsSupportedFormat( format ) )
	167	{
	168	clipboard->m_waiting = false;
	169	return;
	170	}
	171
	172	/* make sure we got the data in the correct form (selection type).
	173	if so, copy data to target object */
	174	if (selection_data->type != GDK_SELECTION_TYPE_STRING)
	175	{
	176	clipboard->m_waiting = false;
	177	return;
	178	}
	179
	180	data_object->SetData( format, (size_t) selection_data->length, (const char*) selection_data->data );
	181
	182	wxTheClipboard->m_formatSupported = true;
	183	clipboard->m_waiting = false;
	184	}
	185
	186	//-----------------------------------------------------------------------------
	187	// "selection_clear"
	188	//-----------------------------------------------------------------------------
	189
	190	static gint
	191	selection_clear_clip( GtkWidget WXUNUSED(widget), GdkEventSelection event )
	192	{
	193	if (!wxTheClipboard) return TRUE;
	194
	195	if (event->selection == GDK_SELECTION_PRIMARY)
	196	{
	197	wxTheClipboard->m_ownsPrimarySelection = false;
	198	}
	199	else
	200	if (event->selection == g_clipboardAtom)
	201	{
	202	wxTheClipboard->m_ownsClipboard = false;
	203	}
	204	else
	205	{
	206	wxTheClipboard->m_waiting = false;
	207	return FALSE;
	208	}
	209
	210	if ((!wxTheClipboard->m_ownsPrimarySelection) &&
	211	(!wxTheClipboard->m_ownsClipboard))
	212	{
	213	/* the clipboard is no longer in our hands. we can the delete clipboard data. */
	214	if (wxTheClipboard->m_data)
	215	{
	216	wxLogTrace(TRACE_CLIPBOARD, wxT("wxClipboard will get cleared" ));
	217
	218	delete wxTheClipboard->m_data;
	219	wxTheClipboard->m_data = (wxDataObject*) NULL;
	220	}
	221	}
	222
	223	wxTheClipboard->m_waiting = false;
	224	return TRUE;
	225	}
	226
	227	//-----------------------------------------------------------------------------
	228	// selection handler for supplying data
	229	//-----------------------------------------------------------------------------
	230
	231	static void
	232	selection_handler( GtkWidget *WXUNUSED(widget),
	233	GtkSelectionData *selection_data,
	234	guint WXUNUSED(info),
	235	guint WXUNUSED(time),
	236	gpointer WXUNUSED(data) )
	237	{
	238	if (!wxTheClipboard) return;
	239
	240	if (!wxTheClipboard->m_data) return;
	241
	242	wxDataObject *data = wxTheClipboard->m_data;
	243
	244	wxDataFormat format( selection_data->target );
	245
	246	if (!data->IsSupportedFormat( format )) return;
	247
	248	int size = data->GetDataSize( format );
	249
	250	if (size == 0) return;
	251
	252	void *d = malloc(size);
	253
	254	data->GetDataHere( selection_data->target, d );
	255
	256	// transform Unicode text into multibyte before putting it on clipboard
	257	#if wxUSE_UNICODE
	258	if ( format.GetType() == wxDF_TEXT \|\| format.GetType() == wxDF_UNICODETEXT)
	259	{
	260	const wchar_t wstr = (const wchar_t )d;
	261	size_t len = wxConvCurrent->WC2MB(NULL, wstr, 0);
	262	char *str = malloc(len + 1);
	263	wxConvCurrent->WC2MB(str, wstr, len);
	264	str[len] = '\0';
	265
	266	free(d);
	267	d = str;
	268	}
	269	#endif // wxUSE_UNICODE
	270
	271	gtk_selection_data_set(
	272	selection_data,
	273	GDK_SELECTION_TYPE_STRING,
	274	8*sizeof(gchar),
	275	(unsigned char*) d,
	276	size );
	277
	278	free(d);
	279	}
	280
	281	#endif
	282
	283	//-----------------------------------------------------------------------------
	284	// wxClipboard
	285	//-----------------------------------------------------------------------------
	286
	287	IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
	288
	289	wxClipboard::wxClipboard()
	290	{
	291	m_open = false;
	292
	293	m_ownsClipboard = false;
	294	m_ownsPrimarySelection = false;
	295
	296	m_data = (wxDataObject*) NULL;
	297	m_receivedData = (wxDataObject*) NULL;
	298
	299	/* we use m_targetsWidget to query what formats are available */
	300
	301	/* we use m_clipboardWidget to get and to offer data */
	302	#if !wxUSE_NANOX
	303	if (!g_clipboardAtom) g_clipboardAtom = XInternAtom( (Display*) wxGetDisplay(), "CLIPBOARD", False );
	304	if (!g_targetsAtom) g_targetsAtom = XInternAtom( (Display*) wxGetDisplay(), "TARGETS", False );
	305	#endif
	306
	307	m_formatSupported = false;
	308	m_targetRequested = 0;
	309
	310	m_usePrimary = false;
	311	}
	312
	313	wxClipboard::~wxClipboard()
	314	{
	315	Clear();
	316
	317	// if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
	318	// if (m_targetsWidget) gtk_widget_destroy( m_targetsWidget );
	319	}
	320
	321	void wxClipboard::Clear()
	322	{
	323	if (m_data)
	324	{
	325	#if wxUSE_THREADS
	326	/* disable GUI threads */
	327	#endif
	328
	329	/* As we have data we also own the clipboard. Once we no longer own
	330	it, clear_selection is called which will set m_data to zero */
	331	#if 0
	332	if (gdk_selection_owner_get( g_clipboardAtom ) == m_clipboardWidget->window)
	333	{
	334	m_waiting = true;
	335
	336	gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom,
	337	(guint32) GDK_CURRENT_TIME );
	338
	339	while (m_waiting) gtk_main_iteration();
	340	}
	341
	342	if (gdk_selection_owner_get( GDK_SELECTION_PRIMARY ) == m_clipboardWidget->window)
	343	{
	344	m_waiting = true;
	345
	346	gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY,
	347	(guint32) GDK_CURRENT_TIME );
	348
	349	while (m_waiting) gtk_main_iteration();
	350	}
	351	#endif
	352
	353	if (m_data)
	354	{
	355	delete m_data;
	356	m_data = (wxDataObject*) NULL;
	357	}
	358
	359	#if wxUSE_THREADS
	360	/* re-enable GUI threads */
	361	#endif
	362	}
	363
	364	m_targetRequested = 0;
	365	m_formatSupported = false;
	366	}
	367
	368	bool wxClipboard::Open()
	369	{
	370	wxCHECK_MSG( !m_open, false, wxT("clipboard already open") );
	371
	372	m_open = true;
	373
	374	return true;
	375	}
	376
	377	bool wxClipboard::SetData( wxDataObject *data )
	378	{
	379	wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
	380
	381	wxCHECK_MSG( data, false, wxT("data is invalid") );
	382
	383	Clear();
	384
	385	return AddData( data );
	386	}
	387
	388	bool wxClipboard::AddData( wxDataObject *data )
	389	{
	390	#if wxUSE_NANOX
	391	return false;
	392	#else
	393	wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
	394
	395	wxCHECK_MSG( data, false, wxT("data is invalid") );
	396
	397	/* we can only store one wxDataObject */
	398	Clear();
	399
	400	m_data = data;
	401
	402	/* get formats from wxDataObjects */
	403	wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ];
	404	m_data->GetAllFormats( array );
	405
	406	#if 0
	407	/* primary selection or clipboard */
	408	Atom clipboard = m_usePrimary ? (Atom) 1 // 1 = primary selection
	409	: g_clipboardAtom;
	410	#endif // 0
	411
	412
	413	for (size_t i = 0; i < m_data->GetFormatCount(); i++)
	414	{
	415	wxLogTrace( TRACE_CLIPBOARD,
	416	wxT("wxClipboard now supports atom %s"),
	417	array[i].GetId().c_str() );
	418
	419	#if 0
	420	gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget),
	421	clipboard,
	422	array[i],
	423	0 ); /* what is info ? */
	424	#endif
	425	}
	426
	427	delete[] array;
	428
	429	#if 0
	430	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	431	"selection_get",
	432	GTK_SIGNAL_FUNC(selection_handler),
	433	(gpointer) NULL );
	434	#endif
	435
	436	#if wxUSE_THREADS
	437	/* disable GUI threads */
	438	#endif
	439
	440	bool res = false;
	441	#if 0
	442	/* Tell the world we offer clipboard data */
	443	res = (gtk_selection_owner_set( m_clipboardWidget,
	444	clipboard,
	445	(guint32) GDK_CURRENT_TIME ));
	446	#endif
	447
	448	if (m_usePrimary)
	449	m_ownsPrimarySelection = res;
	450	else
	451	m_ownsClipboard = res;
	452
	453	#if wxUSE_THREADS
	454	/* re-enable GUI threads */
	455	#endif
	456
	457	return res;
	458	#endif
	459	}
	460
	461	void wxClipboard::Close()
	462	{
	463	wxCHECK_RET( m_open, wxT("clipboard not open") );
	464
	465	m_open = false;
	466	}
	467
	468	bool wxClipboard::IsOpened() const
	469	{
	470	return m_open;
	471	}
	472
	473	bool wxClipboard::IsSupported( const wxDataFormat& format )
	474	{
	475	/* reentrance problems */
	476	if (m_waiting) return false;
	477
	478	/* store requested format to be asked for by callbacks */
	479	m_targetRequested = format;
	480
	481	#if 0
	482	wxLogTrace( TRACE_CLIPBOARD,
	483	wxT("wxClipboard:IsSupported: requested format: %s"),
	484	format.GetId().c_str() );
	485	#endif
	486
	487	wxCHECK_MSG( m_targetRequested, false, wxT("invalid clipboard format") );
	488
	489	m_formatSupported = false;
	490
	491	/* perform query. this will set m_formatSupported to
	492	true if m_targetRequested is supported.
	493	also, we have to wait for the "answer" from the
	494	clipboard owner which is an asynchronous process.
	495	therefore we set m_waiting = true here and wait
	496	until the callback "targets_selection_received"
	497	sets it to false */
	498
	499	m_waiting = true;
	500
	501	#if 0
	502	gtk_selection_convert( m_targetsWidget,
	503	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	504	: g_clipboardAtom,
	505	g_targetsAtom,
	506	(guint32) GDK_CURRENT_TIME );
	507
	508	while (m_waiting) gtk_main_iteration();
	509	#endif
	510
	511	if (!m_formatSupported) return false;
	512
	513	return true;
	514	}
	515
	516	bool wxClipboard::GetData( wxDataObject& data )
	517	{
	518	wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
	519
	520	/* get formats from wxDataObjects */
	521	wxDataFormat *array = new wxDataFormat[ data.GetFormatCount() ];
	522	data.GetAllFormats( array );
	523
	524	for (size_t i = 0; i < data.GetFormatCount(); i++)
	525	{
	526	wxDataFormat format( array[i] );
	527
	528	wxLogTrace( TRACE_CLIPBOARD,
	529	wxT("wxClipboard::GetData: requested format: %s"),
	530	format.GetId().c_str() );
	531
	532	/* is data supported by clipboard ? */
	533
	534	/* store requested format to be asked for by callbacks */
	535	m_targetRequested = format;
	536
	537	wxCHECK_MSG( m_targetRequested, false, wxT("invalid clipboard format") );
	538
	539	m_formatSupported = false;
	540
	541	/* perform query. this will set m_formatSupported to
	542	true if m_targetRequested is supported.
	543	also, we have to wait for the "answer" from the
	544	clipboard owner which is an asynchronous process.
	545	therefore we set m_waiting = true here and wait
	546	until the callback "targets_selection_received"
	547	sets it to false */
	548
	549	m_waiting = true;
	550
	551	#if 0
	552	gtk_selection_convert( m_targetsWidget,
	553	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	554	: g_clipboardAtom,
	555	g_targetsAtom,
	556	(guint32) GDK_CURRENT_TIME );
	557
	558	while (m_waiting) gtk_main_iteration();
	559	#endif
	560
	561	if (!m_formatSupported) continue;
	562
	563	/* store pointer to data object to be filled up by callbacks */
	564	m_receivedData = &data;
	565
	566	/* store requested format to be asked for by callbacks */
	567	m_targetRequested = format;
	568
	569	wxCHECK_MSG( m_targetRequested, false, wxT("invalid clipboard format") );
	570
	571	/* start query */
	572	m_formatSupported = false;
	573
	574	/* ask for clipboard contents. this will set
	575	m_formatSupported to true if m_targetRequested
	576	is supported.
	577	also, we have to wait for the "answer" from the
	578	clipboard owner which is an asynchronous process.
	579	therefore we set m_waiting = true here and wait
	580	until the callback "targets_selection_received"
	581	sets it to false */
	582
	583	m_waiting = true;
	584
	585	wxLogTrace( TRACE_CLIPBOARD,
	586	wxT("wxClipboard::GetData: format found, start convert") );
	587
	588	#if 0
	589	gtk_selection_convert( m_clipboardWidget,
	590	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	591	: g_clipboardAtom,
	592	m_targetRequested,
	593	(guint32) GDK_CURRENT_TIME );
	594
	595	while (m_waiting) gtk_main_iteration();
	596	#endif
	597
	598	/* this is a true error as we checked for the presence of such data before */
	599	wxCHECK_MSG( m_formatSupported, false, wxT("error retrieving data from clipboard") );
	600
	601	/* return success */
	602	delete[] array;
	603	return true;
	604	}
	605
	606	wxLogTrace( TRACE_CLIPBOARD,
	607	wxT("wxClipboard::GetData: format not found") );
	608
	609	/* return failure */
	610	delete[] array;
	611	return false;
	612	}
	613
	614	#endif
	615	// wxUSE_CLIPBOARD