src/gtk/clipbrd.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        clipbrd.cpp
// Purpose:
// Author:      Robert Roebling
// Id:          $Id$
// Copyright:   (c) 1998 Robert Roebling
// Licence:           wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "clipbrd.h"
#endif

#include "wx/clipbrd.h"

#if wxUSE_CLIPBOARD

#include "wx/dataobj.h"
#include "wx/utils.h"
#include "wx/log.h"

#include "glib.h"
#include "gdk/gdk.h"
#include "gtk/gtk.h"

//-----------------------------------------------------------------------------
// thread system
//-----------------------------------------------------------------------------

#if wxUSE_THREADS
extern void wxapp_install_thread_wakeup();
extern void wxapp_uninstall_thread_wakeup();
#endif

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

GdkAtom  g_clipboardAtom   = 0;
GdkAtom  g_targetsAtom     = 0;

//-----------------------------------------------------------------------------
// 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
//-----------------------------------------------------------------------------

static void
targets_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;
    }

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

    /* make sure we got the data in the correct form */
    if (selection_data->type != GDK_SELECTION_TYPE_ATOM)
    {
        clipboard->m_waiting = FALSE;
        return;
    }

/*
    wxDataFormat clip( selection_data->selection );
    wxLogDebug( wxT("selection received for targets, clipboard %s"), clip.GetId().c_str() );
*/

    // 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] );

/*
	wxLogDebug( 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;
    return;
}

//-----------------------------------------------------------------------------
// "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)
        {
	    wxLogDebug( 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, 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;

    /* this will fail for composite formats */
    if (format.GetType() == wxDF_TEXT)
    {
        wxTextDataObject *text_object = (wxTextDataObject*) data;
        wxString text( text_object->GetText() );

#if wxUSE_UNICODE
        const wxWX2MBbuf s = text.mbc_str();
        int len = strlen(s);
#else // more efficient in non-Unicode
        const char *s = text.c_str();
        int len = (int) text.Length();
#endif
        gtk_selection_data_set(
            selection_data,
            GDK_SELECTION_TYPE_STRING,
            8*sizeof(gchar),
            (unsigned char*) (const char*) s,
            len );

        return;
    }

    int size = data->GetDataSize( format );

    if (size == 0) return;

    char *d = new char[size];

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

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

//-----------------------------------------------------------------------------
// 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 */

    m_targetsWidget = gtk_window_new( GTK_WINDOW_POPUP );
    gtk_widget_realize( m_targetsWidget );

    gtk_signal_connect( GTK_OBJECT(m_targetsWidget),
                        "selection_received",
                        GTK_SIGNAL_FUNC( targets_selection_received ),
                        (gpointer) this );

    /* we use m_clipboardWidget to get and to offer data */

    m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
    gtk_widget_realize( m_clipboardWidget );

    gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
                        "selection_received",
                        GTK_SIGNAL_FUNC( selection_received ),
                        (gpointer) this );

    gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
                        "selection_clear_event",
                        GTK_SIGNAL_FUNC( selection_clear_clip ),
                        (gpointer) NULL );

    if (!g_clipboardAtom) g_clipboardAtom = gdk_atom_intern( "CLIPBOARD", FALSE );
    if (!g_targetsAtom) g_targetsAtom = gdk_atom_intern ("TARGETS", FALSE);

    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 */
        wxapp_uninstall_thread_wakeup();
#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 (gdk_selection_owner_get( g_clipboardAtom ) == m_clipboardWidget->window)
        {
            m_waiting = TRUE;

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

            while (m_waiting) gtk_main_iteration();
        }

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

#if wxUSE_THREADS
        /* re-enable GUI threads */
        wxapp_install_thread_wakeup();
#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 )
{
    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 );

    /* primary selection or clipboard */
    GdkAtom clipboard = m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
                                     : g_clipboardAtom;


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

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

    delete[] array;

    gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
                        "selection_get",
                        GTK_SIGNAL_FUNC(selection_handler),
                        (gpointer) NULL );

#if wxUSE_THREADS
    /* disable GUI threads */
    wxapp_uninstall_thread_wakeup();
#endif

    /* Tell the world we offer clipboard data */
    bool res = (gtk_selection_owner_set( m_clipboardWidget,
                                         clipboard,
                                         GDK_CURRENT_TIME ));

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

#if wxUSE_THREADS
    /* re-enable GUI threads */
    wxapp_install_thread_wakeup();
#endif

    return res;
}

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_open) return TRUE;

    /* 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.
       alsom 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;

    gtk_selection_convert( m_targetsWidget,
                           m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
                                        : g_clipboardAtom,
                           g_targetsAtom,
                           GDK_CURRENT_TIME );

    while (m_waiting) gtk_main_iteration();

    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] );

        wxLogDebug( 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;

        gtk_selection_convert( m_targetsWidget,
                           m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
                                        : g_clipboardAtom,
                           g_targetsAtom,
                           GDK_CURRENT_TIME );

        while (m_waiting) gtk_main_iteration();

        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;

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

        gtk_selection_convert( m_clipboardWidget,
                               m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
                                            : g_clipboardAtom,
                               m_targetRequested,
                               GDK_CURRENT_TIME );

        while (m_waiting) gtk_main_iteration();

        /* 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;
    }

    wxLogDebug( wxT("wxClipboard::GetData: format not found") );

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

#endif
  // wxUSE_CLIPBOARD
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: clipbrd.cpp
	3	// Purpose:
	4	// Author: Robert Roebling
	5	// Id: $Id$
	6	// Copyright: (c) 1998 Robert Roebling
	7	// Licence: wxWindows licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10	#ifdef __GNUG__
	11	#pragma implementation "clipbrd.h"
	12	#endif
	13
	14	#include "wx/clipbrd.h"
	15
	16	#if wxUSE_CLIPBOARD
	17
	18	#include "wx/dataobj.h"
	19	#include "wx/utils.h"
	20	#include "wx/log.h"
	21
	22	#include "glib.h"
	23	#include "gdk/gdk.h"
	24	#include "gtk/gtk.h"
	25
	26	//-----------------------------------------------------------------------------
	27	// thread system
	28	//-----------------------------------------------------------------------------
	29
	30	#if wxUSE_THREADS
	31	extern void wxapp_install_thread_wakeup();
	32	extern void wxapp_uninstall_thread_wakeup();
	33	#endif
	34
	35	//-----------------------------------------------------------------------------
	36	// data
	37	//-----------------------------------------------------------------------------
	38
	39	GdkAtom g_clipboardAtom = 0;
	40	GdkAtom g_targetsAtom = 0;
	41
	42	//-----------------------------------------------------------------------------
	43	// reminder
	44	//-----------------------------------------------------------------------------
	45
	46	/* The contents of a selection are returned in a GtkSelectionData
	47	structure. selection/target identify the request.
	48	type specifies the type of the return; if length < 0, and
	49	the data should be ignored. This structure has object semantics -
	50	no fields should be modified directly, they should not be created
	51	directly, and pointers to them should not be stored beyond the duration of
	52	a callback. (If the last is changed, we'll need to add reference
	53	counting)
	54
	55	struct _GtkSelectionData
	56	{
	57	GdkAtom selection;
	58	GdkAtom target;
	59	GdkAtom type;
	60	gint format;
	61	guchar *data;
	62	gint length;
	63	};
	64
	65	*/
	66
	67	//-----------------------------------------------------------------------------
	68	// "selection_received" for targets
	69	//-----------------------------------------------------------------------------
	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)
	80	{
	81	clipboard->m_waiting = FALSE;
	82	return;
	83	}
	84
	85	if (selection_data->length <= 0)
	86	{
	87	clipboard->m_waiting = FALSE;
	88	return;
	89	}
	90
	91	/* make sure we got the data in the correct form */
	92	if (selection_data->type != GDK_SELECTION_TYPE_ATOM)
	93	{
	94	clipboard->m_waiting = FALSE;
	95	return;
	96	}
	97
	98	/*
	99	wxDataFormat clip( selection_data->selection );
	100	wxLogDebug( wxT("selection received for targets, clipboard %s"), clip.GetId().c_str() );
	101	*/
	102
	103	// the atoms we received, holding a list of targets (= formats)
	104	GdkAtom atoms = (GdkAtom )selection_data->data;
	105
	106	for (unsigned int i=0; i<selection_data->length/sizeof(GdkAtom); i++)
	107	{
	108	wxDataFormat format( atoms[i] );
	109
	110	/*
	111	wxLogDebug( wxT("selection received for targets, format %s"), format.GetId().c_str() );
	112	*/
	113
	114	if (format == clipboard->m_targetRequested)
	115	{
	116	clipboard->m_waiting = FALSE;
	117	clipboard->m_formatSupported = TRUE;
	118	return;
	119	}
	120	}
	121
	122	clipboard->m_waiting = FALSE;
	123	return;
	124	}
	125
	126	//-----------------------------------------------------------------------------
	127	// "selection_received" for the actual data
	128	//-----------------------------------------------------------------------------
	129
	130	static void
	131	selection_received( GtkWidget *WXUNUSED(widget),
	132	GtkSelectionData *selection_data,
	133	#if (GTK_MINOR_VERSION > 0)
	134	guint32 WXUNUSED(time),
	135	#endif
	136	wxClipboard *clipboard )
	137	{
	138	if (!wxTheClipboard)
	139	{
	140	clipboard->m_waiting = FALSE;
	141	return;
	142	}
	143
	144	wxDataObject *data_object = clipboard->m_receivedData;
	145
	146	if (!data_object)
	147	{
	148	clipboard->m_waiting = FALSE;
	149	return;
	150	}
	151
	152	if (selection_data->length <= 0)
	153	{
	154	clipboard->m_waiting = FALSE;
	155	return;
	156	}
	157
	158	wxDataFormat format( selection_data->target );
	159
	160	/* make sure we got the data in the correct format */
	161	if (!data_object->IsSupportedFormat( format ) )
	162	{
	163	clipboard->m_waiting = FALSE;
	164	return;
	165	}
	166
	167	/* make sure we got the data in the correct form (selection type).
	168	if so, copy data to target object */
	169	if (selection_data->type != GDK_SELECTION_TYPE_STRING)
	170	{
	171	clipboard->m_waiting = FALSE;
	172	return;
	173	}
	174
	175	data_object->SetData( format, (size_t) selection_data->length, (const char*) selection_data->data );
	176
	177	wxTheClipboard->m_formatSupported = TRUE;
	178	clipboard->m_waiting = FALSE;
	179	}
	180
	181	//-----------------------------------------------------------------------------
	182	// "selection_clear"
	183	//-----------------------------------------------------------------------------
	184
	185	static gint
	186	selection_clear_clip( GtkWidget WXUNUSED(widget), GdkEventSelection event )
	187	{
	188	if (!wxTheClipboard) return TRUE;
	189
	190	if (event->selection == GDK_SELECTION_PRIMARY)
	191	{
	192	wxTheClipboard->m_ownsPrimarySelection = FALSE;
	193	}
	194	else
	195	if (event->selection == g_clipboardAtom)
	196	{
	197	wxTheClipboard->m_ownsClipboard = FALSE;
	198	}
	199	else
	200	{
	201	wxTheClipboard->m_waiting = FALSE;
	202	return FALSE;
	203	}
	204
	205	if ((!wxTheClipboard->m_ownsPrimarySelection) &&
	206	(!wxTheClipboard->m_ownsClipboard))
	207	{
	208	/* the clipboard is no longer in our hands. we can the delete clipboard data. */
	209	if (wxTheClipboard->m_data)
	210	{
	211	wxLogDebug( wxT("wxClipboard will get cleared" ) );
	212
	213	delete wxTheClipboard->m_data;
	214	wxTheClipboard->m_data = (wxDataObject*) NULL;
	215	}
	216	}
	217
	218	wxTheClipboard->m_waiting = FALSE;
	219	return TRUE;
	220	}
	221
	222	//-----------------------------------------------------------------------------
	223	// selection handler for supplying data
	224	//-----------------------------------------------------------------------------
	225
	226	static void
	227	selection_handler( GtkWidget WXUNUSED(widget), GtkSelectionData selection_data, gpointer WXUNUSED(data) )
	228	{
	229	if (!wxTheClipboard) return;
	230
	231	if (!wxTheClipboard->m_data) return;
	232
	233	wxDataObject *data = wxTheClipboard->m_data;
	234
	235	wxDataFormat format( selection_data->target );
	236
	237	if (!data->IsSupportedFormat( format )) return;
	238
	239	/* this will fail for composite formats */
	240	if (format.GetType() == wxDF_TEXT)
	241	{
	242	wxTextDataObject text_object = (wxTextDataObject) data;
	243	wxString text( text_object->GetText() );
	244
	245	#if wxUSE_UNICODE
	246	const wxWX2MBbuf s = text.mbc_str();
	247	int len = strlen(s);
	248	#else // more efficient in non-Unicode
	249	const char *s = text.c_str();
	250	int len = (int) text.Length();
	251	#endif
	252	gtk_selection_data_set(
	253	selection_data,
	254	GDK_SELECTION_TYPE_STRING,
	255	8*sizeof(gchar),
	256	(unsigned char) (const char) s,
	257	len );
	258
	259	return;
	260	}
	261
	262	int size = data->GetDataSize( format );
	263
	264	if (size == 0) return;
	265
	266	char *d = new char[size];
	267
	268	data->GetDataHere( selection_data->target, (void*) d );
	269
	270	gtk_selection_data_set(
	271	selection_data,
	272	GDK_SELECTION_TYPE_STRING,
	273	8*sizeof(gchar),
	274	(unsigned char*) d,
	275	size );
	276	}
	277
	278	//-----------------------------------------------------------------------------
	279	// wxClipboard
	280	//-----------------------------------------------------------------------------
	281
	282	IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
	283
	284	wxClipboard::wxClipboard()
	285	{
	286	m_open = FALSE;
	287
	288	m_ownsClipboard = FALSE;
	289	m_ownsPrimarySelection = FALSE;
	290
	291	m_data = (wxDataObject*) NULL;
	292	m_receivedData = (wxDataObject*) NULL;
	293
	294	/* we use m_targetsWidget to query what formats are available */
	295
	296	m_targetsWidget = gtk_window_new( GTK_WINDOW_POPUP );
	297	gtk_widget_realize( m_targetsWidget );
	298
	299	gtk_signal_connect( GTK_OBJECT(m_targetsWidget),
	300	"selection_received",
	301	GTK_SIGNAL_FUNC( targets_selection_received ),
	302	(gpointer) this );
	303
	304	/* we use m_clipboardWidget to get and to offer data */
	305
	306	m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
	307	gtk_widget_realize( m_clipboardWidget );
	308
	309	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	310	"selection_received",
	311	GTK_SIGNAL_FUNC( selection_received ),
	312	(gpointer) this );
	313
	314	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	315	"selection_clear_event",
	316	GTK_SIGNAL_FUNC( selection_clear_clip ),
	317	(gpointer) NULL );
	318
	319	if (!g_clipboardAtom) g_clipboardAtom = gdk_atom_intern( "CLIPBOARD", FALSE );
	320	if (!g_targetsAtom) g_targetsAtom = gdk_atom_intern ("TARGETS", FALSE);
	321
	322	m_formatSupported = FALSE;
	323	m_targetRequested = 0;
	324
	325	m_usePrimary = FALSE;
	326	}
	327
	328	wxClipboard::~wxClipboard()
	329	{
	330	Clear();
	331
	332	if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
	333	if (m_targetsWidget) gtk_widget_destroy( m_targetsWidget );
	334	}
	335
	336	void wxClipboard::Clear()
	337	{
	338	if (m_data)
	339	{
	340	#if wxUSE_THREADS
	341	/* disable GUI threads */
	342	wxapp_uninstall_thread_wakeup();
	343	#endif
	344
	345	/* As we have data we also own the clipboard. Once we no longer own
	346	it, clear_selection is called which will set m_data to zero */
	347	if (gdk_selection_owner_get( g_clipboardAtom ) == m_clipboardWidget->window)
	348	{
	349	m_waiting = TRUE;
	350
	351	gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom, GDK_CURRENT_TIME );
	352
	353	while (m_waiting) gtk_main_iteration();
	354	}
	355
	356	if (gdk_selection_owner_get( GDK_SELECTION_PRIMARY ) == m_clipboardWidget->window)
	357	{
	358	m_waiting = TRUE;
	359
	360	gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY, GDK_CURRENT_TIME );
	361
	362	while (m_waiting) gtk_main_iteration();
	363	}
	364
	365	if (m_data)
	366	{
	367	delete m_data;
	368	m_data = (wxDataObject*) NULL;
	369	}
	370
	371	#if wxUSE_THREADS
	372	/* re-enable GUI threads */
	373	wxapp_install_thread_wakeup();
	374	#endif
	375	}
	376
	377	m_targetRequested = 0;
	378	m_formatSupported = FALSE;
	379	}
	380
	381	bool wxClipboard::Open()
	382	{
	383	wxCHECK_MSG( !m_open, FALSE, wxT("clipboard already open") );
	384
	385	m_open = TRUE;
	386
	387	return TRUE;
	388	}
	389
	390	bool wxClipboard::SetData( wxDataObject *data )
	391	{
	392	wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") );
	393
	394	wxCHECK_MSG( data, FALSE, wxT("data is invalid") );
	395
	396	Clear();
	397
	398	return AddData( data );
	399	}
	400
	401	bool wxClipboard::AddData( wxDataObject *data )
	402	{
	403	wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") );
	404
	405	wxCHECK_MSG( data, FALSE, wxT("data is invalid") );
	406
	407	/* we can only store one wxDataObject */
	408	Clear();
	409
	410	m_data = data;
	411
	412	/* get formats from wxDataObjects */
	413	wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ];
	414	m_data->GetAllFormats( array );
	415
	416	/* primary selection or clipboard */
	417	GdkAtom clipboard = m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	418	: g_clipboardAtom;
	419
	420
	421	for (size_t i = 0; i < m_data->GetFormatCount(); i++)
	422	{
	423	wxLogDebug( wxT("wxClipboard now supports atom %s"), array[i].GetId().c_str() );
	424
	425	gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget),
	426	clipboard,
	427	array[i],
	428	0 ); /* what is info ? */
	429	}
	430
	431	delete[] array;
	432
	433	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	434	"selection_get",
	435	GTK_SIGNAL_FUNC(selection_handler),
	436	(gpointer) NULL );
	437
	438	#if wxUSE_THREADS
	439	/* disable GUI threads */
	440	wxapp_uninstall_thread_wakeup();
	441	#endif
	442
	443	/* Tell the world we offer clipboard data */
	444	bool res = (gtk_selection_owner_set( m_clipboardWidget,
	445	clipboard,
	446	GDK_CURRENT_TIME ));
	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	wxapp_install_thread_wakeup();
	456	#endif
	457
	458	return res;
	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_open) return TRUE;
	477
	478	/* store requested format to be asked for by callbacks */
	479	m_targetRequested = format;
	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	alsom 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	gtk_selection_convert( m_targetsWidget,
	496	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	497	: g_clipboardAtom,
	498	g_targetsAtom,
	499	GDK_CURRENT_TIME );
	500
	501	while (m_waiting) gtk_main_iteration();
	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	wxLogDebug( wxT("wxClipboard::GetData: requested format: %s"), format.GetId().c_str() );
	521
	522	/* is data supported by clipboard ? */
	523
	524	/* store requested format to be asked for by callbacks */
	525	m_targetRequested = format;
	526
	527	wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") );
	528
	529	m_formatSupported = FALSE;
	530
	531	/* perform query. this will set m_formatSupported to
	532	TRUE if m_targetRequested is supported.
	533	also, we have to wait for the "answer" from the
	534	clipboard owner which is an asynchronous process.
	535	therefore we set m_waiting = TRUE here and wait
	536	until the callback "targets_selection_received"
	537	sets it to FALSE */
	538
	539	m_waiting = TRUE;
	540
	541	gtk_selection_convert( m_targetsWidget,
	542	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	543	: g_clipboardAtom,
	544	g_targetsAtom,
	545	GDK_CURRENT_TIME );
	546
	547	while (m_waiting) gtk_main_iteration();
	548
	549	if (!m_formatSupported) continue;
	550
	551	/* store pointer to data object to be filled up by callbacks */
	552	m_receivedData = &data;
	553
	554	/* store requested format to be asked for by callbacks */
	555	m_targetRequested = format;
	556
	557	wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") );
	558
	559	/* start query */
	560	m_formatSupported = FALSE;
	561
	562	/* ask for clipboard contents. this will set
	563	m_formatSupported to TRUE if m_targetRequested
	564	is supported.
	565	also, we have to wait for the "answer" from the
	566	clipboard owner which is an asynchronous process.
	567	therefore we set m_waiting = TRUE here and wait
	568	until the callback "targets_selection_received"
	569	sets it to FALSE */
	570
	571	m_waiting = TRUE;
	572
	573	wxLogDebug( wxT("wxClipboard::GetData: format found, start convert") );
	574
	575	gtk_selection_convert( m_clipboardWidget,
	576	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	577	: g_clipboardAtom,
	578	m_targetRequested,
	579	GDK_CURRENT_TIME );
	580
	581	while (m_waiting) gtk_main_iteration();
	582
	583	/* this is a true error as we checked for the presence of such data before */
	584	wxCHECK_MSG( m_formatSupported, FALSE, wxT("error retrieving data from clipboard") );
	585
	586	/* return success */
	587	delete[] array;
	588	return TRUE;
	589	}
	590
	591	wxLogDebug( wxT("wxClipboard::GetData: format not found") );
	592
	593	/* return failure */
	594	delete[] array;
	595	return FALSE;
	596	}
	597
	598	#endif
	599	// wxUSE_CLIPBOARD
	600