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 && 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 )
        {
            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;
}

//-----------------------------------------------------------------------------
// "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,
                   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;

    /* 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,
                                     (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();
        }

        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,
                                         (guint32) 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_waiting) return FALSE;

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

/*
    wxLogDebug( wxT("wxClipboard:IsSupported: requested format: %s"), format.GetId().c_str() );
*/

    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,
                           (guint32) 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,
                           (guint32) 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,
                               (guint32) 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 && 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	clipboard->m_waiting = FALSE;
	86	return;
	87	}
	88
	89	/*
	90	wxDataFormat clip( selection_data->selection );
	91	wxLogDebug( wxT("selection received for targets, clipboard %s"), clip.GetId().c_str() );
	92	*/
	93
	94	// the atoms we received, holding a list of targets (= formats)
	95	GdkAtom atoms = (GdkAtom )selection_data->data;
	96
	97	for (unsigned int i=0; i<selection_data->length/sizeof(GdkAtom); i++)
	98	{
	99	wxDataFormat format( atoms[i] );
	100
	101	/*
	102	wxLogDebug( wxT("selection received for targets, format %s"), format.GetId().c_str() );
	103	*/
	104
	105	if (format == clipboard->m_targetRequested)
	106	{
	107	clipboard->m_waiting = FALSE;
	108	clipboard->m_formatSupported = TRUE;
	109	return;
	110	}
	111	}
	112	}
	113
	114	clipboard->m_waiting = FALSE;
	115	}
	116
	117	//-----------------------------------------------------------------------------
	118	// "selection_received" for the actual data
	119	//-----------------------------------------------------------------------------
	120
	121	static void
	122	selection_received( GtkWidget *WXUNUSED(widget),
	123	GtkSelectionData *selection_data,
	124	#if (GTK_MINOR_VERSION > 0)
	125	guint32 WXUNUSED(time),
	126	#endif
	127	wxClipboard *clipboard )
	128	{
	129	if (!wxTheClipboard)
	130	{
	131	clipboard->m_waiting = FALSE;
	132	return;
	133	}
	134
	135	wxDataObject *data_object = clipboard->m_receivedData;
	136
	137	if (!data_object)
	138	{
	139	clipboard->m_waiting = FALSE;
	140	return;
	141	}
	142
	143	if (selection_data->length <= 0)
	144	{
	145	clipboard->m_waiting = FALSE;
	146	return;
	147	}
	148
	149	wxDataFormat format( selection_data->target );
	150
	151	/* make sure we got the data in the correct format */
	152	if (!data_object->IsSupportedFormat( format ) )
	153	{
	154	clipboard->m_waiting = FALSE;
	155	return;
	156	}
	157
	158	/* make sure we got the data in the correct form (selection type).
	159	if so, copy data to target object */
	160	if (selection_data->type != GDK_SELECTION_TYPE_STRING)
	161	{
	162	clipboard->m_waiting = FALSE;
	163	return;
	164	}
	165
	166	data_object->SetData( format, (size_t) selection_data->length, (const char*) selection_data->data );
	167
	168	wxTheClipboard->m_formatSupported = TRUE;
	169	clipboard->m_waiting = FALSE;
	170	}
	171
	172	//-----------------------------------------------------------------------------
	173	// "selection_clear"
	174	//-----------------------------------------------------------------------------
	175
	176	static gint
	177	selection_clear_clip( GtkWidget WXUNUSED(widget), GdkEventSelection event )
	178	{
	179	if (!wxTheClipboard) return TRUE;
	180
	181	if (event->selection == GDK_SELECTION_PRIMARY)
	182	{
	183	wxTheClipboard->m_ownsPrimarySelection = FALSE;
	184	}
	185	else
	186	if (event->selection == g_clipboardAtom)
	187	{
	188	wxTheClipboard->m_ownsClipboard = FALSE;
	189	}
	190	else
	191	{
	192	wxTheClipboard->m_waiting = FALSE;
	193	return FALSE;
	194	}
	195
	196	if ((!wxTheClipboard->m_ownsPrimarySelection) &&
	197	(!wxTheClipboard->m_ownsClipboard))
	198	{
	199	/* the clipboard is no longer in our hands. we can the delete clipboard data. */
	200	if (wxTheClipboard->m_data)
	201	{
	202	wxLogDebug( wxT("wxClipboard will get cleared" ) );
	203
	204	delete wxTheClipboard->m_data;
	205	wxTheClipboard->m_data = (wxDataObject*) NULL;
	206	}
	207	}
	208
	209	wxTheClipboard->m_waiting = FALSE;
	210	return TRUE;
	211	}
	212
	213	//-----------------------------------------------------------------------------
	214	// selection handler for supplying data
	215	//-----------------------------------------------------------------------------
	216
	217	static void
	218	selection_handler( GtkWidget *WXUNUSED(widget),
	219	GtkSelectionData *selection_data,
	220	guint WXUNUSED(info),
	221	guint WXUNUSED(time),
	222	gpointer WXUNUSED(data) )
	223	{
	224	if (!wxTheClipboard) return;
	225
	226	if (!wxTheClipboard->m_data) return;
	227
	228	wxDataObject *data = wxTheClipboard->m_data;
	229
	230	wxDataFormat format( selection_data->target );
	231
	232	if (!data->IsSupportedFormat( format )) return;
	233
	234	/* this will fail for composite formats */
	235	if (format.GetType() == wxDF_TEXT)
	236	{
	237	wxTextDataObject text_object = (wxTextDataObject) data;
	238	wxString text( text_object->GetText() );
	239
	240	#if wxUSE_UNICODE
	241	const wxWX2MBbuf s = text.mbc_str();
	242	int len = strlen(s);
	243	#else // more efficient in non-Unicode
	244	const char *s = text.c_str();
	245	int len = (int) text.Length();
	246	#endif
	247	gtk_selection_data_set(
	248	selection_data,
	249	GDK_SELECTION_TYPE_STRING,
	250	8*sizeof(gchar),
	251	(unsigned char) (const char) s,
	252	len );
	253
	254	return;
	255	}
	256
	257	int size = data->GetDataSize( format );
	258
	259	if (size == 0) return;
	260
	261	char *d = new char[size];
	262
	263	data->GetDataHere( selection_data->target, (void*) d );
	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
	273	//-----------------------------------------------------------------------------
	274	// wxClipboard
	275	//-----------------------------------------------------------------------------
	276
	277	IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
	278
	279	wxClipboard::wxClipboard()
	280	{
	281	m_open = FALSE;
	282
	283	m_ownsClipboard = FALSE;
	284	m_ownsPrimarySelection = FALSE;
	285
	286	m_data = (wxDataObject*) NULL;
	287	m_receivedData = (wxDataObject*) NULL;
	288
	289	/* we use m_targetsWidget to query what formats are available */
	290
	291	m_targetsWidget = gtk_window_new( GTK_WINDOW_POPUP );
	292	gtk_widget_realize( m_targetsWidget );
	293
	294	gtk_signal_connect( GTK_OBJECT(m_targetsWidget),
	295	"selection_received",
	296	GTK_SIGNAL_FUNC( targets_selection_received ),
	297	(gpointer) this );
	298
	299	/* we use m_clipboardWidget to get and to offer data */
	300
	301	m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
	302	gtk_widget_realize( m_clipboardWidget );
	303
	304	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	305	"selection_received",
	306	GTK_SIGNAL_FUNC( selection_received ),
	307	(gpointer) this );
	308
	309	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	310	"selection_clear_event",
	311	GTK_SIGNAL_FUNC( selection_clear_clip ),
	312	(gpointer) NULL );
	313
	314	if (!g_clipboardAtom) g_clipboardAtom = gdk_atom_intern( "CLIPBOARD", FALSE );
	315	if (!g_targetsAtom) g_targetsAtom = gdk_atom_intern ("TARGETS", FALSE);
	316
	317	m_formatSupported = FALSE;
	318	m_targetRequested = 0;
	319
	320	m_usePrimary = FALSE;
	321	}
	322
	323	wxClipboard::~wxClipboard()
	324	{
	325	Clear();
	326
	327	if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
	328	if (m_targetsWidget) gtk_widget_destroy( m_targetsWidget );
	329	}
	330
	331	void wxClipboard::Clear()
	332	{
	333	if (m_data)
	334	{
	335	#if wxUSE_THREADS
	336	/* disable GUI threads */
	337	wxapp_uninstall_thread_wakeup();
	338	#endif
	339
	340	/* As we have data we also own the clipboard. Once we no longer own
	341	it, clear_selection is called which will set m_data to zero */
	342	if (gdk_selection_owner_get( g_clipboardAtom ) == m_clipboardWidget->window)
	343	{
	344	m_waiting = TRUE;
	345
	346	gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom,
	347	(guint32) GDK_CURRENT_TIME );
	348
	349	while (m_waiting) gtk_main_iteration();
	350	}
	351
	352	if (gdk_selection_owner_get( GDK_SELECTION_PRIMARY ) == m_clipboardWidget->window)
	353	{
	354	m_waiting = TRUE;
	355
	356	gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY,
	357	(guint32) GDK_CURRENT_TIME );
	358
	359	while (m_waiting) gtk_main_iteration();
	360	}
	361
	362	if (m_data)
	363	{
	364	delete m_data;
	365	m_data = (wxDataObject*) NULL;
	366	}
	367
	368	#if wxUSE_THREADS
	369	/* re-enable GUI threads */
	370	wxapp_install_thread_wakeup();
	371	#endif
	372	}
	373
	374	m_targetRequested = 0;
	375	m_formatSupported = FALSE;
	376	}
	377
	378	bool wxClipboard::Open()
	379	{
	380	wxCHECK_MSG( !m_open, FALSE, wxT("clipboard already open") );
	381
	382	m_open = TRUE;
	383
	384	return TRUE;
	385	}
	386
	387	bool wxClipboard::SetData( wxDataObject *data )
	388	{
	389	wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") );
	390
	391	wxCHECK_MSG( data, FALSE, wxT("data is invalid") );
	392
	393	Clear();
	394
	395	return AddData( data );
	396	}
	397
	398	bool wxClipboard::AddData( wxDataObject *data )
	399	{
	400	wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") );
	401
	402	wxCHECK_MSG( data, FALSE, wxT("data is invalid") );
	403
	404	/* we can only store one wxDataObject */
	405	Clear();
	406
	407	m_data = data;
	408
	409	/* get formats from wxDataObjects */
	410	wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ];
	411	m_data->GetAllFormats( array );
	412
	413	/* primary selection or clipboard */
	414	GdkAtom clipboard = m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	415	: g_clipboardAtom;
	416
	417
	418	for (size_t i = 0; i < m_data->GetFormatCount(); i++)
	419	{
	420	wxLogDebug( wxT("wxClipboard now supports atom %s"), array[i].GetId().c_str() );
	421
	422	gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget),
	423	clipboard,
	424	array[i],
	425	0 ); /* what is info ? */
	426	}
	427
	428	delete[] array;
	429
	430	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	431	"selection_get",
	432	GTK_SIGNAL_FUNC(selection_handler),
	433	(gpointer) NULL );
	434
	435	#if wxUSE_THREADS
	436	/* disable GUI threads */
	437	wxapp_uninstall_thread_wakeup();
	438	#endif
	439
	440	/* Tell the world we offer clipboard data */
	441	bool res = (gtk_selection_owner_set( m_clipboardWidget,
	442	clipboard,
	443	(guint32) GDK_CURRENT_TIME ));
	444
	445	if (m_usePrimary)
	446	m_ownsPrimarySelection = res;
	447	else
	448	m_ownsClipboard = res;
	449
	450	#if wxUSE_THREADS
	451	/* re-enable GUI threads */
	452	wxapp_install_thread_wakeup();
	453	#endif
	454
	455	return res;
	456	}
	457
	458	void wxClipboard::Close()
	459	{
	460	wxCHECK_RET( m_open, wxT("clipboard not open") );
	461
	462	m_open = FALSE;
	463	}
	464
	465	bool wxClipboard::IsOpened() const
	466	{
	467	return m_open;
	468	}
	469
	470	bool wxClipboard::IsSupported( const wxDataFormat& format )
	471	{
	472	/* reentrance problems */
	473	if (m_waiting) return FALSE;
	474
	475	/* store requested format to be asked for by callbacks */
	476	m_targetRequested = format;
	477
	478	/*
	479	wxLogDebug( wxT("wxClipboard:IsSupported: requested format: %s"), format.GetId().c_str() );
	480	*/
	481
	482	wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") );
	483
	484	m_formatSupported = FALSE;
	485
	486	/* perform query. this will set m_formatSupported to
	487	TRUE if m_targetRequested is supported.
	488	also, we have to wait for the "answer" from the
	489	clipboard owner which is an asynchronous process.
	490	therefore we set m_waiting = TRUE here and wait
	491	until the callback "targets_selection_received"
	492	sets it to FALSE */
	493
	494	m_waiting = TRUE;
	495
	496	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
	504	if (!m_formatSupported) return FALSE;
	505
	506	return TRUE;
	507	}
	508
	509	bool wxClipboard::GetData( wxDataObject& data )
	510	{
	511	wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") );
	512
	513	/* get formats from wxDataObjects */
	514	wxDataFormat *array = new wxDataFormat[ data.GetFormatCount() ];
	515	data.GetAllFormats( array );
	516
	517	for (size_t i = 0; i < data.GetFormatCount(); i++)
	518	{
	519	wxDataFormat format( array[i] );
	520
	521	wxLogDebug( wxT("wxClipboard::GetData: requested format: %s"), format.GetId().c_str() );
	522
	523	/* is data supported by clipboard ? */
	524
	525	/* store requested format to be asked for by callbacks */
	526	m_targetRequested = format;
	527
	528	wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") );
	529
	530	m_formatSupported = FALSE;
	531
	532	/* perform query. this will set m_formatSupported to
	533	TRUE if m_targetRequested is supported.
	534	also, we have to wait for the "answer" from the
	535	clipboard owner which is an asynchronous process.
	536	therefore we set m_waiting = TRUE here and wait
	537	until the callback "targets_selection_received"
	538	sets it to FALSE */
	539
	540	m_waiting = TRUE;
	541
	542	gtk_selection_convert( m_targetsWidget,
	543	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	544	: g_clipboardAtom,
	545	g_targetsAtom,
	546	(guint32) GDK_CURRENT_TIME );
	547
	548	while (m_waiting) gtk_main_iteration();
	549
	550	if (!m_formatSupported) continue;
	551
	552	/* store pointer to data object to be filled up by callbacks */
	553	m_receivedData = &data;
	554
	555	/* store requested format to be asked for by callbacks */
	556	m_targetRequested = format;
	557
	558	wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") );
	559
	560	/* start query */
	561	m_formatSupported = FALSE;
	562
	563	/* ask for clipboard contents. this will set
	564	m_formatSupported to TRUE if m_targetRequested
	565	is supported.
	566	also, we have to wait for the "answer" from the
	567	clipboard owner which is an asynchronous process.
	568	therefore we set m_waiting = TRUE here and wait
	569	until the callback "targets_selection_received"
	570	sets it to FALSE */
	571
	572	m_waiting = TRUE;
	573
	574	wxLogDebug( wxT("wxClipboard::GetData: format found, start convert") );
	575
	576	gtk_selection_convert( m_clipboardWidget,
	577	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	578	: g_clipboardAtom,
	579	m_targetRequested,
	580	(guint32) GDK_CURRENT_TIME );
	581
	582	while (m_waiting) gtk_main_iteration();
	583
	584	/* this is a true error as we checked for the presence of such data before */
	585	wxCHECK_MSG( m_formatSupported, FALSE, wxT("error retrieving data from clipboard") );
	586
	587	/* return success */
	588	delete[] array;
	589	return TRUE;
	590	}
	591
	592	wxLogDebug( wxT("wxClipboard::GetData: format not found") );
	593
	594	/* return failure */
	595	delete[] array;
	596	return FALSE;
	597	}
	598
	599	#endif
	600	// wxUSE_CLIPBOARD
	601