src/gtk1/clipbrd.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        gtk/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
#endif

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

GdkAtom  g_clipboardAtom   = 0;
GdkAtom  g_targetsAtom     = 0;

// the trace mask we use with wxLogTrace() - call
// wxLog::AddTraceMask(TRACE_CLIPBOARD) to enable the trace messages from here
// (there will be a *lot* of them!)
static const wxChar *TRACE_CLIPBOARD = _T("clipboard");

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

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

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

*/

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

static void
targets_selection_received( GtkWidget *WXUNUSED(widget),
                            GtkSelectionData *selection_data,
                            guint32 WXUNUSED(time),
                            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() );

//            printf( "format %s requested %s\n",
//                    gdk_atom_name( atoms[i] ),
//                    gdk_atom_name( clipboard->m_targetRequested ) );

            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,
                    guint32 WXUNUSED(time),
                    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);

    // Text data will be in UTF8 in Unicode mode.
    data->GetDataHere( selection_data->target, d );

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

    free(d);
}

//-----------------------------------------------------------------------------
// 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 */
#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 */
#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++)
    {
        wxLogTrace( TRACE_CLIPBOARD,
                    wxT("wxClipboard now supports atom %s"),
                    array[i].GetId().c_str() );

//        printf( "added %s\n",
//                    gdk_atom_name( array[i].GetFormatId() ) );

        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 */
#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 */
#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;

#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;

    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] );

        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;

        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;

        wxLogTrace( TRACE_CLIPBOARD,
                    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;
    }

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

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

#endif
  // wxUSE_CLIPBOARD
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: gtk/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	#endif
	32
	33	//-----------------------------------------------------------------------------
	34	// data
	35	//-----------------------------------------------------------------------------
	36
	37	GdkAtom g_clipboardAtom = 0;
	38	GdkAtom g_targetsAtom = 0;
	39
	40	// the trace mask we use with wxLogTrace() - call
	41	// wxLog::AddTraceMask(TRACE_CLIPBOARD) to enable the trace messages from here
	42	// (there will be a lot of them!)
	43	static const wxChar *TRACE_CLIPBOARD = _T("clipboard");
	44
	45	//-----------------------------------------------------------------------------
	46	// reminder
	47	//-----------------------------------------------------------------------------
	48
	49	/* The contents of a selection are returned in a GtkSelectionData
	50	structure. selection/target identify the request.
	51	type specifies the type of the return; if length < 0, and
	52	the data should be ignored. This structure has object semantics -
	53	no fields should be modified directly, they should not be created
	54	directly, and pointers to them should not be stored beyond the duration of
	55	a callback. (If the last is changed, we'll need to add reference
	56	counting)
	57
	58	struct _GtkSelectionData
	59	{
	60	GdkAtom selection;
	61	GdkAtom target;
	62	GdkAtom type;
	63	gint format;
	64	guchar *data;
	65	gint length;
	66	};
	67
	68	*/
	69
	70	//-----------------------------------------------------------------------------
	71	// "selection_received" for targets
	72	//-----------------------------------------------------------------------------
	73
	74	static void
	75	targets_selection_received( GtkWidget *WXUNUSED(widget),
	76	GtkSelectionData *selection_data,
	77	guint32 WXUNUSED(time),
	78	wxClipboard *clipboard )
	79	{
	80	if ( wxTheClipboard && selection_data->length > 0 )
	81	{
	82	// make sure we got the data in the correct form
	83	GdkAtom type = selection_data->type;
	84	if ( type != GDK_SELECTION_TYPE_ATOM )
	85	{
	86	if ( strcmp(gdk_atom_name(type), "TARGETS") )
	87	{
	88	wxLogTrace( TRACE_CLIPBOARD,
	89	_T("got unsupported clipboard target") );
	90
	91	clipboard->m_waiting = FALSE;
	92	return;
	93	}
	94	}
	95
	96	#ifdef __WXDEBUG__
	97	wxDataFormat clip( selection_data->selection );
	98	wxLogTrace( TRACE_CLIPBOARD,
	99	wxT("selection received for targets, clipboard %s"),
	100	clip.GetId().c_str() );
	101	#endif // __WXDEBUG__
	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	wxLogTrace( TRACE_CLIPBOARD,
	111	wxT("selection received for targets, format %s"),
	112	format.GetId().c_str() );
	113
	114	// printf( "format %s requested %s\n",
	115	// gdk_atom_name( atoms[i] ),
	116	// gdk_atom_name( clipboard->m_targetRequested ) );
	117
	118	if (format == clipboard->m_targetRequested)
	119	{
	120	clipboard->m_waiting = FALSE;
	121	clipboard->m_formatSupported = TRUE;
	122	return;
	123	}
	124	}
	125	}
	126
	127	clipboard->m_waiting = FALSE;
	128	}
	129
	130	//-----------------------------------------------------------------------------
	131	// "selection_received" for the actual data
	132	//-----------------------------------------------------------------------------
	133
	134	static void
	135	selection_received( GtkWidget *WXUNUSED(widget),
	136	GtkSelectionData *selection_data,
	137	guint32 WXUNUSED(time),
	138	wxClipboard *clipboard )
	139	{
	140	if (!wxTheClipboard)
	141	{
	142	clipboard->m_waiting = FALSE;
	143	return;
	144	}
	145
	146	wxDataObject *data_object = clipboard->m_receivedData;
	147
	148	if (!data_object)
	149	{
	150	clipboard->m_waiting = FALSE;
	151	return;
	152	}
	153
	154	if (selection_data->length <= 0)
	155	{
	156	clipboard->m_waiting = FALSE;
	157	return;
	158	}
	159
	160	wxDataFormat format( selection_data->target );
	161
	162	// make sure we got the data in the correct format
	163	if (!data_object->IsSupportedFormat( format ) )
	164	{
	165	clipboard->m_waiting = FALSE;
	166	return;
	167	}
	168
	169	/* make sure we got the data in the correct form (selection type).
	170	if so, copy data to target object */
	171	if (selection_data->type != GDK_SELECTION_TYPE_STRING)
	172	{
	173	clipboard->m_waiting = FALSE;
	174	return;
	175	}
	176
	177	data_object->SetData( format, (size_t) selection_data->length, (const char*) selection_data->data );
	178
	179	wxTheClipboard->m_formatSupported = TRUE;
	180	clipboard->m_waiting = FALSE;
	181	}
	182
	183	//-----------------------------------------------------------------------------
	184	// "selection_clear"
	185	//-----------------------------------------------------------------------------
	186
	187	static gint
	188	selection_clear_clip( GtkWidget WXUNUSED(widget), GdkEventSelection event )
	189	{
	190	if (!wxTheClipboard) return TRUE;
	191
	192	if (event->selection == GDK_SELECTION_PRIMARY)
	193	{
	194	wxTheClipboard->m_ownsPrimarySelection = FALSE;
	195	}
	196	else
	197	if (event->selection == g_clipboardAtom)
	198	{
	199	wxTheClipboard->m_ownsClipboard = FALSE;
	200	}
	201	else
	202	{
	203	wxTheClipboard->m_waiting = FALSE;
	204	return FALSE;
	205	}
	206
	207	if ((!wxTheClipboard->m_ownsPrimarySelection) &&
	208	(!wxTheClipboard->m_ownsClipboard))
	209	{
	210	/* the clipboard is no longer in our hands. we can the delete clipboard data. */
	211	if (wxTheClipboard->m_data)
	212	{
	213	wxLogTrace(TRACE_CLIPBOARD, wxT("wxClipboard will get cleared" ));
	214
	215	delete wxTheClipboard->m_data;
	216	wxTheClipboard->m_data = (wxDataObject*) NULL;
	217	}
	218	}
	219
	220	wxTheClipboard->m_waiting = FALSE;
	221	return TRUE;
	222	}
	223
	224	//-----------------------------------------------------------------------------
	225	// selection handler for supplying data
	226	//-----------------------------------------------------------------------------
	227
	228	static void
	229	selection_handler( GtkWidget *WXUNUSED(widget),
	230	GtkSelectionData *selection_data,
	231	guint WXUNUSED(info),
	232	guint WXUNUSED(time),
	233	gpointer WXUNUSED(data) )
	234	{
	235	if (!wxTheClipboard) return;
	236
	237	if (!wxTheClipboard->m_data) return;
	238
	239	wxDataObject *data = wxTheClipboard->m_data;
	240
	241	wxDataFormat format( selection_data->target );
	242
	243	if (!data->IsSupportedFormat( format )) return;
	244
	245	int size = data->GetDataSize( format );
	246
	247	if (size == 0) return;
	248
	249	void *d = malloc(size);
	250
	251	// Text data will be in UTF8 in Unicode mode.
	252	data->GetDataHere( selection_data->target, d );
	253
	254	gtk_selection_data_set(
	255	selection_data,
	256	GDK_SELECTION_TYPE_STRING,
	257	8*sizeof(gchar),
	258	(unsigned char*) d,
	259	size );
	260
	261	free(d);
	262	}
	263
	264	//-----------------------------------------------------------------------------
	265	// wxClipboard
	266	//-----------------------------------------------------------------------------
	267
	268	IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
	269
	270	wxClipboard::wxClipboard()
	271	{
	272	m_open = FALSE;
	273
	274	m_ownsClipboard = FALSE;
	275	m_ownsPrimarySelection = FALSE;
	276
	277	m_data = (wxDataObject*) NULL;
	278	m_receivedData = (wxDataObject*) NULL;
	279
	280	/* we use m_targetsWidget to query what formats are available */
	281
	282	m_targetsWidget = gtk_window_new( GTK_WINDOW_POPUP );
	283	gtk_widget_realize( m_targetsWidget );
	284
	285	gtk_signal_connect( GTK_OBJECT(m_targetsWidget),
	286	"selection_received",
	287	GTK_SIGNAL_FUNC( targets_selection_received ),
	288	(gpointer) this );
	289
	290	/* we use m_clipboardWidget to get and to offer data */
	291
	292	m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP );
	293	gtk_widget_realize( m_clipboardWidget );
	294
	295	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	296	"selection_received",
	297	GTK_SIGNAL_FUNC( selection_received ),
	298	(gpointer) this );
	299
	300	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	301	"selection_clear_event",
	302	GTK_SIGNAL_FUNC( selection_clear_clip ),
	303	(gpointer) NULL );
	304
	305	if (!g_clipboardAtom) g_clipboardAtom = gdk_atom_intern( "CLIPBOARD", FALSE );
	306	if (!g_targetsAtom) g_targetsAtom = gdk_atom_intern ("TARGETS", FALSE);
	307
	308	m_formatSupported = FALSE;
	309	m_targetRequested = 0;
	310
	311	m_usePrimary = FALSE;
	312	}
	313
	314	wxClipboard::~wxClipboard()
	315	{
	316	Clear();
	317
	318	if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget );
	319	if (m_targetsWidget) gtk_widget_destroy( m_targetsWidget );
	320	}
	321
	322	void wxClipboard::Clear()
	323	{
	324	if (m_data)
	325	{
	326	#if wxUSE_THREADS
	327	/* disable GUI threads */
	328	#endif
	329
	330	// As we have data we also own the clipboard. Once we no longer own
	331	// it, clear_selection is called which will set m_data to zero
	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
	352	if (m_data)
	353	{
	354	delete m_data;
	355	m_data = (wxDataObject*) NULL;
	356	}
	357
	358	#if wxUSE_THREADS
	359	/* re-enable GUI threads */
	360	#endif
	361	}
	362
	363	m_targetRequested = 0;
	364	m_formatSupported = FALSE;
	365	}
	366
	367	bool wxClipboard::Open()
	368	{
	369	wxCHECK_MSG( !m_open, FALSE, wxT("clipboard already open") );
	370
	371	m_open = TRUE;
	372
	373	return TRUE;
	374	}
	375
	376	bool wxClipboard::SetData( wxDataObject *data )
	377	{
	378	wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") );
	379
	380	wxCHECK_MSG( data, FALSE, wxT("data is invalid") );
	381
	382	Clear();
	383
	384	return AddData( data );
	385	}
	386
	387	bool wxClipboard::AddData( 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	// we can only store one wxDataObject
	394	Clear();
	395
	396	m_data = data;
	397
	398	// get formats from wxDataObjects
	399	wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ];
	400	m_data->GetAllFormats( array );
	401
	402	// primary selection or clipboard
	403	GdkAtom clipboard = m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	404	: g_clipboardAtom;
	405
	406
	407	for (size_t i = 0; i < m_data->GetFormatCount(); i++)
	408	{
	409	wxLogTrace( TRACE_CLIPBOARD,
	410	wxT("wxClipboard now supports atom %s"),
	411	array[i].GetId().c_str() );
	412
	413	// printf( "added %s\n",
	414	// gdk_atom_name( array[i].GetFormatId() ) );
	415
	416	gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget),
	417	clipboard,
	418	array[i],
	419	0 ); /* what is info ? */
	420	}
	421
	422	delete[] array;
	423
	424	gtk_signal_connect( GTK_OBJECT(m_clipboardWidget),
	425	"selection_get",
	426	GTK_SIGNAL_FUNC(selection_handler),
	427	(gpointer) NULL );
	428
	429	#if wxUSE_THREADS
	430	/* disable GUI threads */
	431	#endif
	432
	433	/* Tell the world we offer clipboard data */
	434	bool res = (gtk_selection_owner_set( m_clipboardWidget,
	435	clipboard,
	436	(guint32) GDK_CURRENT_TIME ));
	437
	438	if (m_usePrimary)
	439	m_ownsPrimarySelection = res;
	440	else
	441	m_ownsClipboard = res;
	442
	443	#if wxUSE_THREADS
	444	/* re-enable GUI threads */
	445	#endif
	446
	447	return res;
	448	}
	449
	450	void wxClipboard::Close()
	451	{
	452	wxCHECK_RET( m_open, wxT("clipboard not open") );
	453
	454	m_open = FALSE;
	455	}
	456
	457	bool wxClipboard::IsOpened() const
	458	{
	459	return m_open;
	460	}
	461
	462	bool wxClipboard::IsSupported( const wxDataFormat& format )
	463	{
	464	/* reentrance problems */
	465	if (m_waiting) return FALSE;
	466
	467	/* store requested format to be asked for by callbacks */
	468	m_targetRequested = format;
	469
	470	#if 0
	471	wxLogTrace( TRACE_CLIPBOARD,
	472	wxT("wxClipboard:IsSupported: requested format: %s"),
	473	format.GetId().c_str() );
	474	#endif
	475
	476	wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") );
	477
	478	m_formatSupported = FALSE;
	479
	480	/* perform query. this will set m_formatSupported to
	481	TRUE if m_targetRequested is supported.
	482	also, we have to wait for the "answer" from the
	483	clipboard owner which is an asynchronous process.
	484	therefore we set m_waiting = TRUE here and wait
	485	until the callback "targets_selection_received"
	486	sets it to FALSE */
	487
	488	m_waiting = TRUE;
	489
	490	gtk_selection_convert( m_targetsWidget,
	491	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	492	: g_clipboardAtom,
	493	g_targetsAtom,
	494	(guint32) GDK_CURRENT_TIME );
	495
	496	while (m_waiting) gtk_main_iteration();
	497
	498	if (!m_formatSupported) return FALSE;
	499
	500	return TRUE;
	501	}
	502
	503	bool wxClipboard::GetData( wxDataObject& data )
	504	{
	505	wxCHECK_MSG( m_open, FALSE, wxT("clipboard not open") );
	506
	507	/* get formats from wxDataObjects */
	508	wxDataFormat *array = new wxDataFormat[ data.GetFormatCount() ];
	509	data.GetAllFormats( array );
	510
	511	for (size_t i = 0; i < data.GetFormatCount(); i++)
	512	{
	513	wxDataFormat format( array[i] );
	514
	515	wxLogTrace( TRACE_CLIPBOARD,
	516	wxT("wxClipboard::GetData: requested format: %s"),
	517	format.GetId().c_str() );
	518
	519	/* is data supported by clipboard ? */
	520
	521	/* store requested format to be asked for by callbacks */
	522	m_targetRequested = format;
	523
	524	wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") );
	525
	526	m_formatSupported = FALSE;
	527
	528	/* perform query. this will set m_formatSupported to
	529	TRUE if m_targetRequested is supported.
	530	also, we have to wait for the "answer" from the
	531	clipboard owner which is an asynchronous process.
	532	therefore we set m_waiting = TRUE here and wait
	533	until the callback "targets_selection_received"
	534	sets it to FALSE */
	535
	536	m_waiting = TRUE;
	537
	538	gtk_selection_convert( m_targetsWidget,
	539	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	540	: g_clipboardAtom,
	541	g_targetsAtom,
	542	(guint32) GDK_CURRENT_TIME );
	543
	544	while (m_waiting) gtk_main_iteration();
	545
	546	if (!m_formatSupported) continue;
	547
	548	/* store pointer to data object to be filled up by callbacks */
	549	m_receivedData = &data;
	550
	551	/* store requested format to be asked for by callbacks */
	552	m_targetRequested = format;
	553
	554	wxCHECK_MSG( m_targetRequested, FALSE, wxT("invalid clipboard format") );
	555
	556	/* start query */
	557	m_formatSupported = FALSE;
	558
	559	/* ask for clipboard contents. this will set
	560	m_formatSupported to TRUE if m_targetRequested
	561	is supported.
	562	also, we have to wait for the "answer" from the
	563	clipboard owner which is an asynchronous process.
	564	therefore we set m_waiting = TRUE here and wait
	565	until the callback "targets_selection_received"
	566	sets it to FALSE */
	567
	568	m_waiting = TRUE;
	569
	570	wxLogTrace( TRACE_CLIPBOARD,
	571	wxT("wxClipboard::GetData: format found, start convert") );
	572
	573	gtk_selection_convert( m_clipboardWidget,
	574	m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY
	575	: g_clipboardAtom,
	576	m_targetRequested,
	577	(guint32) GDK_CURRENT_TIME );
	578
	579	while (m_waiting) gtk_main_iteration();
	580
	581	/* this is a true error as we checked for the presence of such data before */
	582	wxCHECK_MSG( m_formatSupported, FALSE, wxT("error retrieving data from clipboard") );
	583
	584	/* return success */
	585	delete[] array;
	586	return TRUE;
	587	}
	588
	589	wxLogTrace( TRACE_CLIPBOARD,
	590	wxT("wxClipboard::GetData: format not found") );
	591
	592	/* return failure */
	593	delete[] array;
	594	return FALSE;
	595	}
	596
	597	#endif
	598	// wxUSE_CLIPBOARD
	599