src/motif/clipbrd.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        clipbrd.cpp
// Purpose:     Clipboard functionality
// Author:      Julian Smart
// Modified by: Mattia Barbon (added support for generic wxDataObjects)
// Created:     17/09/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////

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

#ifdef __VMS
#include "wx/vms_x_fix.h"
#define XtWindow XTWINDOW
#define XtScreen XTSCREEN
#define XtParent XTPARENT
#define XtIsRealized XTISREALIZED
#define XtDisplay XTDISPLAY
#endif

#include "wx/defs.h"

#if wxUSE_CLIPBOARD

#include "wx/app.h"
#include "wx/bitmap.h"
#include "wx/utils.h"
#include "wx/clipbrd.h"
#include "wx/dataobj.h"
#include "wx/ptr_scpd.h"

#ifdef __VMS__
#pragma message disable nosimpint

#endif
#include <Xm/Xm.h>
#include <Xm/CutPaste.h>
#ifdef __VMS__
#pragma message enable nosimpint
#endif

#include "wx/motif/private.h"

bool wxOpenClipboard()
{
    return wxTheClipboard->Open();
}

bool wxCloseClipboard()
{
    wxTheClipboard->Close();

    return true;
}

bool wxEmptyClipboard()
{
    wxTheClipboard->Clear();
    return true;
}

bool wxClipboardOpen()
{
    return wxTheClipboard->IsOpened();
}

bool wxIsClipboardFormatAvailable(wxDataFormat dataFormat)
{
    return wxTheClipboard->IsSupported( dataFormat );
}

bool wxSetClipboardData(wxDataFormat dataFormat, wxObject *obj,
                        int WXUNUSED(width), int WXUNUSED(height))
{
    wxDataObject* dobj = NULL;

    if( dataFormat == wxDF_TEXT )
    {
        wxChar* data = (wxChar*)obj;
        dobj = new wxTextDataObject( data );
    }
    else if( dataFormat = wxDF_BITMAP )
    {
        wxBitmap* data = (wxBitmap*)obj;
        dobj = new wxBitmapDataObject( *data );
    }

    if( !dobj )
        return false;

    return wxTheClipboard->SetData( dobj );
}

wxObject *wxGetClipboardData(wxDataFormat dataFormat, long *len)
{
    wxDataObject* dobj = NULL;
    wxTextDataObject* tobj = NULL;
    wxBitmapDataObject* bobj = NULL;

    if( dataFormat == wxDF_TEXT )
    {
        dobj = tobj = new wxTextDataObject;
    }
    else if( dataFormat = wxDF_BITMAP )
    {
        dobj = bobj = new wxBitmapDataObject;
    }

    if( !dobj || !wxTheClipboard->GetData( *dobj ) )
        return NULL;

    if( tobj )
    {
        wxString text = tobj->GetText();
        wxChar* buf = new wxChar[text.length() + 1];

        if( len ) *len = text.length();
        return (wxObject*)wxStrcpy( buf, text.c_str() );
    }
    else if( bobj )
    {
        if( len ) *len = 0;
        return new wxBitmap( bobj->GetBitmap() );
    }

    return NULL; // just in case...
}

wxDataFormat wxEnumClipboardFormats(wxDataFormat dataFormat)
{
    // Only wxDF_TEXT supported
    if (dataFormat == wxDF_TEXT)
       return wxDF_TEXT;
    else
       return wxDF_INVALID;
}

wxDataFormat wxRegisterClipboardFormat(char *WXUNUSED(formatName))
{
    // Not supported
    return wxDF_INVALID;
}

bool wxGetClipboardFormatName(wxDataFormat dataFormat, char *formatName,
                              int maxCount)
{
    wxStrncpy( formatName, dataFormat.GetId().c_str(), maxCount );

    return true;
}

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

struct wxDataIdToDataObject
{
    wxDataIdToDataObject( wxDataObject* o, long d, size_t s )
        : object( o ), size( s ), dataId( d ) { }

    wxDataObject* object;
    size_t        size;
    long          dataId;
};

#include "wx/listimpl.cpp"

WX_DEFINE_LIST(wxDataObjectList);
WX_DEFINE_LIST(wxDataIdToDataObjectList);

#if wxCHECK_LESSTIF()
static void wxClipboardCallback( Widget widget, int* data_id,
                                 int* priv, int* reason );
#else
static void wxClipboardCallback( Widget widget, long* data_id,
                                 long* priv, int* reason );
#endif

IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)

wxClipboard::wxClipboard()
{
    m_open = false;
}

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

void wxClipboard::Clear()
{
    wxDataObjectList::Node* node = m_data.GetFirst();
    while (node)
    {
        delete node->GetData();
        node = node->GetNext();
    }
    m_data.Clear();

    for( wxDataIdToDataObjectList::Node* node2 = m_idToObject.GetFirst();
         node2; node2 = node2->GetNext() )
        delete node->GetData();
    m_idToObject.Clear();
}

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

    m_open = true;

    return true;
}

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

    Clear();

    return AddData( data );
}

wxDECLARE_SCOPED_ARRAY( wxDataFormat, wxDataFormatScopedArray );
wxDEFINE_SCOPED_ARRAY( wxDataFormat, wxDataFormatScopedArray );

#if wxCHECK_LESSTIF()
void wxClipboardCallback( Widget xwidget, int* data_id,
                          int* priv, int* reason )
#else
void wxClipboardCallback( Widget xwidget, long* data_id,
                          long* priv, int* reason )
#endif
{
    Display* xdisplay = XtDisplay( xwidget );
    Window xwindow = XtWindow( xwidget );
    wxDataObject* dobj = NULL;
    size_t size = 0;

    for( wxDataIdToDataObjectList::Node* node2 =
             wxTheClipboard->m_idToObject.GetFirst();
         node2; node2 = node2->GetNext() )
    {
        wxDataIdToDataObject* dido = node2->GetData();
        if( dido->dataId == *data_id )
        {
            dobj = dido->object;
            size = dido->size;
            break;
        }
    }

    if( !dobj ) return;

    wxCharBuffer buffer(size);
    size_t count = dobj->GetFormatCount( wxDataObject::Get );
    wxDataFormatScopedArray dfarr( new wxDataFormat[count] );
    dobj->GetAllFormats( dfarr.get(), wxDataObject::Get );

    if( !dobj->GetDataHere( dfarr[*priv], buffer.data() ) )
        return;

    while( XmClipboardCopyByName( xdisplay, xwindow, *data_id,
                                  buffer.data(), size, 0 )
           == XmClipboardLocked );
}

bool wxClipboard::AddData( wxDataObject *data )
{
    wxCHECK_MSG( data, false, "data is invalid" );
    wxCHECK_MSG( m_open, false, "clipboard not open" );

    m_data.Append( data );

    Display* xdisplay = wxGlobalDisplay();
    Widget xwidget = (Widget)wxTheApp->GetTopLevelWidget();
    Window xwindow = XtWindow( xwidget );
    wxXmString label( wxTheApp->GetAppName() );
    Time timestamp = XtLastTimestampProcessed( xdisplay );
    long itemId;

    int retval;

    while( ( retval = XmClipboardStartCopy( xdisplay, xwindow, label(),
                                            timestamp, xwidget,
                                            wxClipboardCallback,
                                            &itemId ) )
           == XmClipboardLocked );
    if( retval != XmClipboardSuccess )
        return false;

    size_t count = data->GetFormatCount( wxDataObject::Get );
    wxDataFormatScopedArray dfarr( new wxDataFormat[count] );
    data->GetAllFormats( dfarr.get(), wxDataObject::Get );

    for( size_t i = 0; i < count; ++i )
    {
        size_t size = data->GetDataSize( dfarr[i] );
        long data_id;
        wxString id = dfarr[i].GetId();

        while( ( retval = XmClipboardCopy( xdisplay, xwindow, itemId,
                                           wxConstCast(id.c_str(), char),
                                           NULL, size, i, &data_id ) )
               == XmClipboardLocked );

        m_idToObject.Append( new wxDataIdToDataObject( data, data_id, size ) );
    }

    while( XmClipboardEndCopy( xdisplay, xwindow, itemId )
           == XmClipboardLocked );

    return true;
}

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

    m_open = false;
}

bool wxClipboard::IsSupported(const wxDataFormat& format)
{
    Display* xdisplay = wxGlobalDisplay();
    Window xwindow = XtWindow( (Widget)wxTheApp->GetTopLevelWidget() );
    bool isSupported = false;
    int retval, count;
    unsigned long  max_name_length;
    wxString id = format.GetId();

    while( ( retval = XmClipboardLock( xdisplay, xwindow ) )
           == XmClipboardLocked );
    if( retval != XmClipboardSuccess )
        return false;

    if( XmClipboardInquireCount( xdisplay, xwindow, &count, &max_name_length )
        == XmClipboardSuccess )
    {
        wxCharBuffer buf( max_name_length + 1 );
        unsigned long copied;

        for( int i = 0; i < count; ++i )
        {
            if( XmClipboardInquireFormat( xdisplay, xwindow, i + 1,
                                          (XtPointer)buf.data(),
                                          max_name_length, &copied )
                != XmClipboardSuccess )
                continue;

            buf.data()[copied] = '\0';

            if( buf == id )
            {
                isSupported = true;
                break;
            }
        }
    }

    XmClipboardUnlock( xdisplay, xwindow, False );

    return isSupported;
}

class wxClipboardEndRetrieve
{
public:
    wxClipboardEndRetrieve( Display* display, Window window )
        : m_display( display ), m_window( window ) { }
    ~wxClipboardEndRetrieve()
    {
        while( XmClipboardEndRetrieve( m_display, m_window )
               == XmClipboardLocked );
    }
private:
    Display* m_display;
    Window m_window;
};

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

    Display* xdisplay = wxGlobalDisplay();
    Window xwindow = XtWindow( (Widget)wxTheApp->GetTopLevelWidget() );
    Time timestamp = XtLastTimestampProcessed( xdisplay );

    wxDataFormat chosenFormat;
    int retval;

    ///////////////////////////////////////////////////////////////////////////
    // determine if the cliboard holds any format we like
    ///////////////////////////////////////////////////////////////////////////
    while( ( retval = XmClipboardStartRetrieve( xdisplay, xwindow,
                                                timestamp ) )
           == XmClipboardLocked );
    if( retval != XmClipboardSuccess )
        return false;

    wxClipboardEndRetrieve endRetrieve( xdisplay, xwindow );

    int count;
    unsigned long max_name_length;
    size_t dfcount = data.GetFormatCount( wxDataObject::Set );
    wxDataFormatScopedArray dfarr( new wxDataFormat[dfcount] );
    data.GetAllFormats( dfarr.get(), wxDataObject::Set );

    if( XmClipboardInquireCount( xdisplay, xwindow, &count, &max_name_length )
        == XmClipboardSuccess )
    {
        wxCharBuffer buf( max_name_length + 1 );
        unsigned long copied;

        for( int i = 0; i < count; ++i )
        {
            if( XmClipboardInquireFormat( xdisplay, xwindow, i + 1,
                                          (XtPointer)buf.data(),
                                          max_name_length, &copied )
                != XmClipboardSuccess )
                continue;

            buf.data()[copied] = '\0';

            // try preferred format
            if( buf == data.GetPreferredFormat( wxDataObject::Set ).GetId() )
            {
                chosenFormat = data.GetPreferredFormat( wxDataObject::Set );
                break;
            }

            // try all other formats
            for( size_t i = 0; i < dfcount; ++i )
            {
                if( buf == dfarr[i].GetId() )
                    chosenFormat = dfarr[i];
            }
        }
    }

    if( chosenFormat == wxDF_INVALID )
        return false;

    ///////////////////////////////////////////////////////////////////////////
    // now retrieve the data
    ///////////////////////////////////////////////////////////////////////////
    unsigned long length, dummy1;
    long dummy2;
    wxString id = chosenFormat.GetId();

    while( ( retval = XmClipboardInquireLength( xdisplay, xwindow,
                                                wxConstCast(id.c_str(), char),
                                                &length ) )
           == XmClipboardLocked );
    if( retval != XmClipboardSuccess )
        return false;

    wxCharBuffer buf(length);

    while( ( retval = XmClipboardRetrieve( xdisplay, xwindow,
                                           wxConstCast(id.c_str(), char),
                                           (XtPointer)buf.data(),
                                           length, &dummy1, &dummy2 ) )
           == XmClipboardLocked );
    if( retval != XmClipboardSuccess )
        return false;

    if( !data.SetData( chosenFormat, length, buf.data() ) )
        return false;

    return true;
}

#endif // wxUSE_CLIPBOARD
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: clipbrd.cpp
	3	// Purpose: Clipboard functionality
	4	// Author: Julian Smart
	5	// Modified by: Mattia Barbon (added support for generic wxDataObjects)
	6	// Created: 17/09/98
	7	// RCS-ID: $Id$
	8	// Copyright: (c) Julian Smart
	9	// Licence: wxWindows licence
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	#ifdef __GNUG__
	13	#pragma implementation
	14	#pragma implementation "clipbrd.h"
	15	#endif
	16
	17	#ifdef __VMS
	18	#include "wx/vms_x_fix.h"
	19	#define XtWindow XTWINDOW
	20	#define XtScreen XTSCREEN
	21	#define XtParent XTPARENT
	22	#define XtIsRealized XTISREALIZED
	23	#define XtDisplay XTDISPLAY
	24	#endif
	25
	26	#include "wx/defs.h"
	27
	28	#if wxUSE_CLIPBOARD
	29
	30	#include "wx/app.h"
	31	#include "wx/bitmap.h"
	32	#include "wx/utils.h"
	33	#include "wx/clipbrd.h"
	34	#include "wx/dataobj.h"
	35	#include "wx/ptr_scpd.h"
	36
	37	#ifdef __VMS__
	38	#pragma message disable nosimpint
	39
	40	#endif
	41	#include <Xm/Xm.h>
	42	#include <Xm/CutPaste.h>
	43	#ifdef __VMS__
	44	#pragma message enable nosimpint
	45	#endif
	46
	47	#include "wx/motif/private.h"
	48
	49	bool wxOpenClipboard()
	50	{
	51	return wxTheClipboard->Open();
	52	}
	53
	54	bool wxCloseClipboard()
	55	{
	56	wxTheClipboard->Close();
	57
	58	return true;
	59	}
	60
	61	bool wxEmptyClipboard()
	62	{
	63	wxTheClipboard->Clear();
	64	return true;
	65	}
	66
	67	bool wxClipboardOpen()
	68	{
	69	return wxTheClipboard->IsOpened();
	70	}
	71
	72	bool wxIsClipboardFormatAvailable(wxDataFormat dataFormat)
	73	{
	74	return wxTheClipboard->IsSupported( dataFormat );
	75	}
	76
	77	bool wxSetClipboardData(wxDataFormat dataFormat, wxObject *obj,
	78	int WXUNUSED(width), int WXUNUSED(height))
	79	{
	80	wxDataObject* dobj = NULL;
	81
	82	if( dataFormat == wxDF_TEXT )
	83	{
	84	wxChar* data = (wxChar*)obj;
	85	dobj = new wxTextDataObject( data );
	86	}
	87	else if( dataFormat = wxDF_BITMAP )
	88	{
	89	wxBitmap* data = (wxBitmap*)obj;
	90	dobj = new wxBitmapDataObject( *data );
	91	}
	92
	93	if( !dobj )
	94	return false;
	95
	96	return wxTheClipboard->SetData( dobj );
	97	}
	98
	99	wxObject wxGetClipboardData(wxDataFormat dataFormat, long len)
	100	{
	101	wxDataObject* dobj = NULL;
	102	wxTextDataObject* tobj = NULL;
	103	wxBitmapDataObject* bobj = NULL;
	104
	105	if( dataFormat == wxDF_TEXT )
	106	{
	107	dobj = tobj = new wxTextDataObject;
	108	}
	109	else if( dataFormat = wxDF_BITMAP )
	110	{
	111	dobj = bobj = new wxBitmapDataObject;
	112	}
	113
	114	if( !dobj \|\| !wxTheClipboard->GetData( *dobj ) )
	115	return NULL;
	116
	117	if( tobj )
	118	{
	119	wxString text = tobj->GetText();
	120	wxChar* buf = new wxChar[text.length() + 1];
	121
	122	if( len ) *len = text.length();
	123	return (wxObject*)wxStrcpy( buf, text.c_str() );
	124	}
	125	else if( bobj )
	126	{
	127	if( len ) *len = 0;
	128	return new wxBitmap( bobj->GetBitmap() );
	129	}
	130
	131	return NULL; // just in case...
	132	}
	133
	134	wxDataFormat wxEnumClipboardFormats(wxDataFormat dataFormat)
	135	{
	136	// Only wxDF_TEXT supported
	137	if (dataFormat == wxDF_TEXT)
	138	return wxDF_TEXT;
	139	else
	140	return wxDF_INVALID;
	141	}
	142
	143	wxDataFormat wxRegisterClipboardFormat(char *WXUNUSED(formatName))
	144	{
	145	// Not supported
	146	return wxDF_INVALID;
	147	}
	148
	149	bool wxGetClipboardFormatName(wxDataFormat dataFormat, char *formatName,
	150	int maxCount)
	151	{
	152	wxStrncpy( formatName, dataFormat.GetId().c_str(), maxCount );
	153
	154	return true;
	155	}
	156
	157	//-----------------------------------------------------------------------------
	158	// wxClipboard
	159	//-----------------------------------------------------------------------------
	160
	161	struct wxDataIdToDataObject
	162	{
	163	wxDataIdToDataObject( wxDataObject* o, long d, size_t s )
	164	: object( o ), size( s ), dataId( d ) { }
	165
	166	wxDataObject* object;
	167	size_t size;
	168	long dataId;
	169	};
	170
	171	#include "wx/listimpl.cpp"
	172
	173	WX_DEFINE_LIST(wxDataObjectList);
	174	WX_DEFINE_LIST(wxDataIdToDataObjectList);
	175
	176	#if wxCHECK_LESSTIF()
	177	static void wxClipboardCallback( Widget widget, int* data_id,
	178	int* priv, int* reason );
	179	#else
	180	static void wxClipboardCallback( Widget widget, long* data_id,
	181	long* priv, int* reason );
	182	#endif
	183
	184	IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
	185
	186	wxClipboard::wxClipboard()
	187	{
	188	m_open = false;
	189	}
	190
	191	wxClipboard::~wxClipboard()
	192	{
	193	Clear();
	194	}
	195
	196	void wxClipboard::Clear()
	197	{
	198	wxDataObjectList::Node* node = m_data.GetFirst();
	199	while (node)
	200	{
	201	delete node->GetData();
	202	node = node->GetNext();
	203	}
	204	m_data.Clear();
	205
	206	for( wxDataIdToDataObjectList::Node* node2 = m_idToObject.GetFirst();
	207	node2; node2 = node2->GetNext() )
	208	delete node->GetData();
	209	m_idToObject.Clear();
	210	}
	211
	212	bool wxClipboard::Open()
	213	{
	214	wxCHECK_MSG( !m_open, false, "clipboard already open" );
	215
	216	m_open = true;
	217
	218	return true;
	219	}
	220
	221	bool wxClipboard::SetData( wxDataObject *data )
	222	{
	223	wxCHECK_MSG( data, false, "data is invalid" );
	224	wxCHECK_MSG( m_open, false, "clipboard not open" );
	225
	226	Clear();
	227
	228	return AddData( data );
	229	}
	230
	231	wxDECLARE_SCOPED_ARRAY( wxDataFormat, wxDataFormatScopedArray );
	232	wxDEFINE_SCOPED_ARRAY( wxDataFormat, wxDataFormatScopedArray );
	233
	234	#if wxCHECK_LESSTIF()
	235	void wxClipboardCallback( Widget xwidget, int* data_id,
	236	int* priv, int* reason )
	237	#else
	238	void wxClipboardCallback( Widget xwidget, long* data_id,
	239	long* priv, int* reason )
	240	#endif
	241	{
	242	Display* xdisplay = XtDisplay( xwidget );
	243	Window xwindow = XtWindow( xwidget );
	244	wxDataObject* dobj = NULL;
	245	size_t size = 0;
	246
	247	for( wxDataIdToDataObjectList::Node* node2 =
	248	wxTheClipboard->m_idToObject.GetFirst();
	249	node2; node2 = node2->GetNext() )
	250	{
	251	wxDataIdToDataObject* dido = node2->GetData();
	252	if( dido->dataId == *data_id )
	253	{
	254	dobj = dido->object;
	255	size = dido->size;
	256	break;
	257	}
	258	}
	259
	260	if( !dobj ) return;
	261
	262	wxCharBuffer buffer(size);
	263	size_t count = dobj->GetFormatCount( wxDataObject::Get );
	264	wxDataFormatScopedArray dfarr( new wxDataFormat[count] );
	265	dobj->GetAllFormats( dfarr.get(), wxDataObject::Get );
	266
	267	if( !dobj->GetDataHere( dfarr[*priv], buffer.data() ) )
	268	return;
	269
	270	while( XmClipboardCopyByName( xdisplay, xwindow, *data_id,
	271	buffer.data(), size, 0 )
	272	== XmClipboardLocked );
	273	}
	274
	275	bool wxClipboard::AddData( wxDataObject *data )
	276	{
	277	wxCHECK_MSG( data, false, "data is invalid" );
	278	wxCHECK_MSG( m_open, false, "clipboard not open" );
	279
	280	m_data.Append( data );
	281
	282	Display* xdisplay = wxGlobalDisplay();
	283	Widget xwidget = (Widget)wxTheApp->GetTopLevelWidget();
	284	Window xwindow = XtWindow( xwidget );
	285	wxXmString label( wxTheApp->GetAppName() );
	286	Time timestamp = XtLastTimestampProcessed( xdisplay );
	287	long itemId;
	288
	289	int retval;
	290
	291	while( ( retval = XmClipboardStartCopy( xdisplay, xwindow, label(),
	292	timestamp, xwidget,
	293	wxClipboardCallback,
	294	&itemId ) )
	295	== XmClipboardLocked );
	296	if( retval != XmClipboardSuccess )
	297	return false;
	298
	299	size_t count = data->GetFormatCount( wxDataObject::Get );
	300	wxDataFormatScopedArray dfarr( new wxDataFormat[count] );
	301	data->GetAllFormats( dfarr.get(), wxDataObject::Get );
	302
	303	for( size_t i = 0; i < count; ++i )
	304	{
	305	size_t size = data->GetDataSize( dfarr[i] );
	306	long data_id;
	307	wxString id = dfarr[i].GetId();
	308
	309	while( ( retval = XmClipboardCopy( xdisplay, xwindow, itemId,
	310	wxConstCast(id.c_str(), char),
	311	NULL, size, i, &data_id ) )
	312	== XmClipboardLocked );
	313
	314	m_idToObject.Append( new wxDataIdToDataObject( data, data_id, size ) );
	315	}
	316
	317	while( XmClipboardEndCopy( xdisplay, xwindow, itemId )
	318	== XmClipboardLocked );
	319
	320	return true;
	321	}
	322
	323	void wxClipboard::Close()
	324	{
	325	wxCHECK_RET( m_open, "clipboard not open" );
	326
	327	m_open = false;
	328	}
	329
	330	bool wxClipboard::IsSupported(const wxDataFormat& format)
	331	{
	332	Display* xdisplay = wxGlobalDisplay();
	333	Window xwindow = XtWindow( (Widget)wxTheApp->GetTopLevelWidget() );
	334	bool isSupported = false;
	335	int retval, count;
	336	unsigned long max_name_length;
	337	wxString id = format.GetId();
	338
	339	while( ( retval = XmClipboardLock( xdisplay, xwindow ) )
	340	== XmClipboardLocked );
	341	if( retval != XmClipboardSuccess )
	342	return false;
	343
	344	if( XmClipboardInquireCount( xdisplay, xwindow, &count, &max_name_length )
	345	== XmClipboardSuccess )
	346	{
	347	wxCharBuffer buf( max_name_length + 1 );
	348	unsigned long copied;
	349
	350	for( int i = 0; i < count; ++i )
	351	{
	352	if( XmClipboardInquireFormat( xdisplay, xwindow, i + 1,
	353	(XtPointer)buf.data(),
	354	max_name_length, &copied )
	355	!= XmClipboardSuccess )
	356	continue;
	357
	358	buf.data()[copied] = '\0';
	359
	360	if( buf == id )
	361	{
	362	isSupported = true;
	363	break;
	364	}
	365	}
	366	}
	367
	368	XmClipboardUnlock( xdisplay, xwindow, False );
	369
	370	return isSupported;
	371	}
	372
	373	class wxClipboardEndRetrieve
	374	{
	375	public:
	376	wxClipboardEndRetrieve( Display* display, Window window )
	377	: m_display( display ), m_window( window ) { }
	378	~wxClipboardEndRetrieve()
	379	{
	380	while( XmClipboardEndRetrieve( m_display, m_window )
	381	== XmClipboardLocked );
	382	}
	383	private:
	384	Display* m_display;
	385	Window m_window;
	386	};
	387
	388	bool wxClipboard::GetData( wxDataObject& data )
	389	{
	390	wxCHECK_MSG( m_open, false, "clipboard not open" );
	391
	392	Display* xdisplay = wxGlobalDisplay();
	393	Window xwindow = XtWindow( (Widget)wxTheApp->GetTopLevelWidget() );
	394	Time timestamp = XtLastTimestampProcessed( xdisplay );
	395
	396	wxDataFormat chosenFormat;
	397	int retval;
	398
	399	///////////////////////////////////////////////////////////////////////////
	400	// determine if the cliboard holds any format we like
	401	///////////////////////////////////////////////////////////////////////////
	402	while( ( retval = XmClipboardStartRetrieve( xdisplay, xwindow,
	403	timestamp ) )
	404	== XmClipboardLocked );
	405	if( retval != XmClipboardSuccess )
	406	return false;
	407
	408	wxClipboardEndRetrieve endRetrieve( xdisplay, xwindow );
	409
	410	int count;
	411	unsigned long max_name_length;
	412	size_t dfcount = data.GetFormatCount( wxDataObject::Set );
	413	wxDataFormatScopedArray dfarr( new wxDataFormat[dfcount] );
	414	data.GetAllFormats( dfarr.get(), wxDataObject::Set );
	415
	416	if( XmClipboardInquireCount( xdisplay, xwindow, &count, &max_name_length )
	417	== XmClipboardSuccess )
	418	{
	419	wxCharBuffer buf( max_name_length + 1 );
	420	unsigned long copied;
	421
	422	for( int i = 0; i < count; ++i )
	423	{
	424	if( XmClipboardInquireFormat( xdisplay, xwindow, i + 1,
	425	(XtPointer)buf.data(),
	426	max_name_length, &copied )
	427	!= XmClipboardSuccess )
	428	continue;
	429
	430	buf.data()[copied] = '\0';
	431
	432	// try preferred format
	433	if( buf == data.GetPreferredFormat( wxDataObject::Set ).GetId() )
	434	{
	435	chosenFormat = data.GetPreferredFormat( wxDataObject::Set );
	436	break;
	437	}
	438
	439	// try all other formats
	440	for( size_t i = 0; i < dfcount; ++i )
	441	{
	442	if( buf == dfarr[i].GetId() )
	443	chosenFormat = dfarr[i];
	444	}
	445	}
	446	}
	447
	448	if( chosenFormat == wxDF_INVALID )
	449	return false;
	450
	451	///////////////////////////////////////////////////////////////////////////
	452	// now retrieve the data
	453	///////////////////////////////////////////////////////////////////////////
	454	unsigned long length, dummy1;
	455	long dummy2;
	456	wxString id = chosenFormat.GetId();
	457
	458	while( ( retval = XmClipboardInquireLength( xdisplay, xwindow,
	459	wxConstCast(id.c_str(), char),
	460	&length ) )
	461	== XmClipboardLocked );
	462	if( retval != XmClipboardSuccess )
	463	return false;
	464
	465	wxCharBuffer buf(length);
	466
	467	while( ( retval = XmClipboardRetrieve( xdisplay, xwindow,
	468	wxConstCast(id.c_str(), char),
	469	(XtPointer)buf.data(),
	470	length, &dummy1, &dummy2 ) )
	471	== XmClipboardLocked );
	472	if( retval != XmClipboardSuccess )
	473	return false;
	474
	475	if( !data.SetData( chosenFormat, length, buf.data() ) )
	476	return false;
	477
	478	return true;
	479	}
	480
	481	#endif // wxUSE_CLIPBOARD