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
/////////////////////////////////////////////////////////////////////////////

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation
#pragma implementation "clipbrd.h"
#endif

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

#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::compatibility_iterator node = m_data.GetFirst();
    while (node)
    {
        delete node->GetData();
        node = node->GetNext();
    }
    m_data.Clear();

    for( wxDataIdToDataObjectList::compatibility_iterator 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::compatibility_iterator 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->GetTopLevelRealizedWidget();
    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->GetTopLevelRealizedWidget() );
    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->GetTopLevelRealizedWidget() );
    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	#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
	13	#pragma implementation
	14	#pragma implementation "clipbrd.h"
	15	#endif
	16
	17	// For compilers that support precompilation, includes "wx.h".
	18	#include "wx/wxprec.h"
	19
	20	#ifdef __VMS
	21	#include "wx/vms_x_fix.h"
	22	#define XtWindow XTWINDOW
	23	#define XtScreen XTSCREEN
	24	#define XtParent XTPARENT
	25	#define XtIsRealized XTISREALIZED
	26	#define XtDisplay XTDISPLAY
	27	#endif
	28
	29	#include "wx/defs.h"
	30
	31	#if wxUSE_CLIPBOARD
	32
	33	#include "wx/app.h"
	34	#include "wx/bitmap.h"
	35	#include "wx/utils.h"
	36	#include "wx/clipbrd.h"
	37	#include "wx/dataobj.h"
	38	#include "wx/ptr_scpd.h"
	39
	40	#ifdef __VMS__
	41	#pragma message disable nosimpint
	42
	43	#endif
	44	#include <Xm/Xm.h>
	45	#include <Xm/CutPaste.h>
	46	#ifdef __VMS__
	47	#pragma message enable nosimpint
	48	#endif
	49
	50	#include "wx/motif/private.h"
	51
	52	bool wxOpenClipboard()
	53	{
	54	return wxTheClipboard->Open();
	55	}
	56
	57	bool wxCloseClipboard()
	58	{
	59	wxTheClipboard->Close();
	60
	61	return true;
	62	}
	63
	64	bool wxEmptyClipboard()
	65	{
	66	wxTheClipboard->Clear();
	67	return true;
	68	}
	69
	70	bool wxClipboardOpen()
	71	{
	72	return wxTheClipboard->IsOpened();
	73	}
	74
	75	bool wxIsClipboardFormatAvailable(wxDataFormat dataFormat)
	76	{
	77	return wxTheClipboard->IsSupported( dataFormat );
	78	}
	79
	80	bool wxSetClipboardData(wxDataFormat dataFormat, wxObject *obj,
	81	int WXUNUSED(width), int WXUNUSED(height))
	82	{
	83	wxDataObject* dobj = NULL;
	84
	85	if( dataFormat == wxDF_TEXT )
	86	{
	87	wxChar* data = (wxChar*)obj;
	88	dobj = new wxTextDataObject( data );
	89	}
	90	else if( dataFormat = wxDF_BITMAP )
	91	{
	92	wxBitmap* data = (wxBitmap*)obj;
	93	dobj = new wxBitmapDataObject( *data );
	94	}
	95
	96	if( !dobj )
	97	return false;
	98
	99	return wxTheClipboard->SetData( dobj );
	100	}
	101
	102	wxObject wxGetClipboardData(wxDataFormat dataFormat, long len)
	103	{
	104	wxDataObject* dobj = NULL;
	105	wxTextDataObject* tobj = NULL;
	106	wxBitmapDataObject* bobj = NULL;
	107
	108	if( dataFormat == wxDF_TEXT )
	109	{
	110	dobj = tobj = new wxTextDataObject;
	111	}
	112	else if( dataFormat = wxDF_BITMAP )
	113	{
	114	dobj = bobj = new wxBitmapDataObject;
	115	}
	116
	117	if( !dobj \|\| !wxTheClipboard->GetData( *dobj ) )
	118	return NULL;
	119
	120	if( tobj )
	121	{
	122	wxString text = tobj->GetText();
	123	wxChar* buf = new wxChar[text.length() + 1];
	124
	125	if( len ) *len = text.length();
	126	return (wxObject*)wxStrcpy( buf, text.c_str() );
	127	}
	128	else if( bobj )
	129	{
	130	if( len ) *len = 0;
	131	return new wxBitmap( bobj->GetBitmap() );
	132	}
	133
	134	return NULL; // just in case...
	135	}
	136
	137	wxDataFormat wxEnumClipboardFormats(wxDataFormat dataFormat)
	138	{
	139	// Only wxDF_TEXT supported
	140	if (dataFormat == wxDF_TEXT)
	141	return wxDF_TEXT;
	142	else
	143	return wxDF_INVALID;
	144	}
	145
	146	wxDataFormat wxRegisterClipboardFormat(char *WXUNUSED(formatName))
	147	{
	148	// Not supported
	149	return wxDF_INVALID;
	150	}
	151
	152	bool wxGetClipboardFormatName(wxDataFormat dataFormat, char *formatName,
	153	int maxCount)
	154	{
	155	wxStrncpy( formatName, dataFormat.GetId().c_str(), maxCount );
	156
	157	return true;
	158	}
	159
	160	//-----------------------------------------------------------------------------
	161	// wxClipboard
	162	//-----------------------------------------------------------------------------
	163
	164	struct wxDataIdToDataObject
	165	{
	166	wxDataIdToDataObject( wxDataObject* o, long d, size_t s )
	167	: object( o ), size( s ), dataId( d ) { }
	168
	169	wxDataObject* object;
	170	size_t size;
	171	long dataId;
	172	};
	173
	174	#include "wx/listimpl.cpp"
	175
	176	WX_DEFINE_LIST(wxDataObjectList);
	177	WX_DEFINE_LIST(wxDataIdToDataObjectList);
	178
	179	#if wxCHECK_LESSTIF()
	180	static void wxClipboardCallback( Widget widget, int* data_id,
	181	int* priv, int* reason );
	182	#else
	183	static void wxClipboardCallback( Widget widget, long* data_id,
	184	long* priv, int* reason );
	185	#endif
	186
	187	IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
	188
	189	wxClipboard::wxClipboard()
	190	{
	191	m_open = false;
	192	}
	193
	194	wxClipboard::~wxClipboard()
	195	{
	196	Clear();
	197	}
	198
	199	void wxClipboard::Clear()
	200	{
	201	wxDataObjectList::compatibility_iterator node = m_data.GetFirst();
	202	while (node)
	203	{
	204	delete node->GetData();
	205	node = node->GetNext();
	206	}
	207	m_data.Clear();
	208
	209	for( wxDataIdToDataObjectList::compatibility_iterator node2 = m_idToObject.GetFirst();
	210	node2; node2 = node2->GetNext() )
	211	delete node->GetData();
	212	m_idToObject.Clear();
	213	}
	214
	215	bool wxClipboard::Open()
	216	{
	217	wxCHECK_MSG( !m_open, false, "clipboard already open" );
	218
	219	m_open = true;
	220
	221	return true;
	222	}
	223
	224	bool wxClipboard::SetData( wxDataObject *data )
	225	{
	226	wxCHECK_MSG( data, false, "data is invalid" );
	227	wxCHECK_MSG( m_open, false, "clipboard not open" );
	228
	229	Clear();
	230
	231	return AddData( data );
	232	}
	233
	234	wxDECLARE_SCOPED_ARRAY( wxDataFormat, wxDataFormatScopedArray );
	235	wxDEFINE_SCOPED_ARRAY( wxDataFormat, wxDataFormatScopedArray );
	236
	237	#if wxCHECK_LESSTIF()
	238	void wxClipboardCallback( Widget xwidget, int* data_id,
	239	int* priv, int* reason )
	240	#else
	241	void wxClipboardCallback( Widget xwidget, long* data_id,
	242	long* priv, int* reason )
	243	#endif
	244	{
	245	Display* xdisplay = XtDisplay( xwidget );
	246	Window xwindow = XtWindow( xwidget );
	247	wxDataObject* dobj = NULL;
	248	size_t size = 0;
	249
	250	for( wxDataIdToDataObjectList::compatibility_iterator node2 =
	251	wxTheClipboard->m_idToObject.GetFirst();
	252	node2; node2 = node2->GetNext() )
	253	{
	254	wxDataIdToDataObject* dido = node2->GetData();
	255	if( dido->dataId == *data_id )
	256	{
	257	dobj = dido->object;
	258	size = dido->size;
	259	break;
	260	}
	261	}
	262
	263	if( !dobj ) return;
	264
	265	wxCharBuffer buffer(size);
	266	size_t count = dobj->GetFormatCount( wxDataObject::Get );
	267	wxDataFormatScopedArray dfarr( new wxDataFormat[count] );
	268	dobj->GetAllFormats( dfarr.get(), wxDataObject::Get );
	269
	270	if( !dobj->GetDataHere( dfarr[*priv], buffer.data() ) )
	271	return;
	272
	273	while( XmClipboardCopyByName( xdisplay, xwindow, *data_id,
	274	buffer.data(), size, 0 )
	275	== XmClipboardLocked );
	276	}
	277
	278	bool wxClipboard::AddData( wxDataObject *data )
	279	{
	280	wxCHECK_MSG( data, false, "data is invalid" );
	281	wxCHECK_MSG( m_open, false, "clipboard not open" );
	282
	283	m_data.Append( data );
	284
	285	Display* xdisplay = wxGlobalDisplay();
	286	Widget xwidget = (Widget)wxTheApp->GetTopLevelRealizedWidget();
	287	Window xwindow = XtWindow( xwidget );
	288	wxXmString label( wxTheApp->GetAppName() );
	289	Time timestamp = XtLastTimestampProcessed( xdisplay );
	290	long itemId;
	291
	292	int retval;
	293
	294	while( ( retval = XmClipboardStartCopy( xdisplay, xwindow, label(),
	295	timestamp, xwidget,
	296	wxClipboardCallback,
	297	&itemId ) )
	298	== XmClipboardLocked );
	299	if( retval != XmClipboardSuccess )
	300	return false;
	301
	302	size_t count = data->GetFormatCount( wxDataObject::Get );
	303	wxDataFormatScopedArray dfarr( new wxDataFormat[count] );
	304	data->GetAllFormats( dfarr.get(), wxDataObject::Get );
	305
	306	for( size_t i = 0; i < count; ++i )
	307	{
	308	size_t size = data->GetDataSize( dfarr[i] );
	309	long data_id;
	310	wxString id = dfarr[i].GetId();
	311
	312	while( ( retval = XmClipboardCopy( xdisplay, xwindow, itemId,
	313	wxConstCast(id.c_str(), char),
	314	NULL, size, i, &data_id ) )
	315	== XmClipboardLocked );
	316
	317	m_idToObject.Append( new wxDataIdToDataObject( data, data_id, size ) );
	318	}
	319
	320	while( XmClipboardEndCopy( xdisplay, xwindow, itemId )
	321	== XmClipboardLocked );
	322
	323	return true;
	324	}
	325
	326	void wxClipboard::Close()
	327	{
	328	wxCHECK_RET( m_open, "clipboard not open" );
	329
	330	m_open = false;
	331	}
	332
	333	bool wxClipboard::IsSupported(const wxDataFormat& format)
	334	{
	335	Display* xdisplay = wxGlobalDisplay();
	336	Window xwindow = XtWindow( (Widget)wxTheApp->GetTopLevelRealizedWidget() );
	337	bool isSupported = false;
	338	int retval, count;
	339	unsigned long max_name_length;
	340	wxString id = format.GetId();
	341
	342	while( ( retval = XmClipboardLock( xdisplay, xwindow ) )
	343	== XmClipboardLocked );
	344	if( retval != XmClipboardSuccess )
	345	return false;
	346
	347	if( XmClipboardInquireCount( xdisplay, xwindow, &count, &max_name_length )
	348	== XmClipboardSuccess )
	349	{
	350	wxCharBuffer buf( max_name_length + 1 );
	351	unsigned long copied;
	352
	353	for( int i = 0; i < count; ++i )
	354	{
	355	if( XmClipboardInquireFormat( xdisplay, xwindow, i + 1,
	356	(XtPointer)buf.data(),
	357	max_name_length, &copied )
	358	!= XmClipboardSuccess )
	359	continue;
	360
	361	buf.data()[copied] = '\0';
	362
	363	if( buf == id )
	364	{
	365	isSupported = true;
	366	break;
	367	}
	368	}
	369	}
	370
	371	XmClipboardUnlock( xdisplay, xwindow, False );
	372
	373	return isSupported;
	374	}
	375
	376	class wxClipboardEndRetrieve
	377	{
	378	public:
	379	wxClipboardEndRetrieve( Display* display, Window window )
	380	: m_display( display ), m_window( window ) { }
	381	~wxClipboardEndRetrieve()
	382	{
	383	while( XmClipboardEndRetrieve( m_display, m_window )
	384	== XmClipboardLocked );
	385	}
	386	private:
	387	Display* m_display;
	388	Window m_window;
	389	};
	390
	391	bool wxClipboard::GetData( wxDataObject& data )
	392	{
	393	wxCHECK_MSG( m_open, false, "clipboard not open" );
	394
	395	Display* xdisplay = wxGlobalDisplay();
	396	Window xwindow = XtWindow( (Widget)wxTheApp->GetTopLevelRealizedWidget() );
	397	Time timestamp = XtLastTimestampProcessed( xdisplay );
	398
	399	wxDataFormat chosenFormat;
	400	int retval;
	401
	402	///////////////////////////////////////////////////////////////////////////
	403	// determine if the cliboard holds any format we like
	404	///////////////////////////////////////////////////////////////////////////
	405	while( ( retval = XmClipboardStartRetrieve( xdisplay, xwindow,
	406	timestamp ) )
	407	== XmClipboardLocked );
	408	if( retval != XmClipboardSuccess )
	409	return false;
	410
	411	wxClipboardEndRetrieve endRetrieve( xdisplay, xwindow );
	412
	413	int count;
	414	unsigned long max_name_length;
	415	size_t dfcount = data.GetFormatCount( wxDataObject::Set );
	416	wxDataFormatScopedArray dfarr( new wxDataFormat[dfcount] );
	417	data.GetAllFormats( dfarr.get(), wxDataObject::Set );
	418
	419	if( XmClipboardInquireCount( xdisplay, xwindow, &count, &max_name_length )
	420	== XmClipboardSuccess )
	421	{
	422	wxCharBuffer buf( max_name_length + 1 );
	423	unsigned long copied;
	424
	425	for( int i = 0; i < count; ++i )
	426	{
	427	if( XmClipboardInquireFormat( xdisplay, xwindow, i + 1,
	428	(XtPointer)buf.data(),
	429	max_name_length, &copied )
	430	!= XmClipboardSuccess )
	431	continue;
	432
	433	buf.data()[copied] = '\0';
	434
	435	// try preferred format
	436	if( buf == data.GetPreferredFormat( wxDataObject::Set ).GetId() )
	437	{
	438	chosenFormat = data.GetPreferredFormat( wxDataObject::Set );
	439	break;
	440	}
	441
	442	// try all other formats
	443	for( size_t i = 0; i < dfcount; ++i )
	444	{
	445	if( buf == dfarr[i].GetId() )
	446	chosenFormat = dfarr[i];
	447	}
	448	}
	449	}
	450
	451	if( chosenFormat == wxDF_INVALID )
	452	return false;
	453
	454	///////////////////////////////////////////////////////////////////////////
	455	// now retrieve the data
	456	///////////////////////////////////////////////////////////////////////////
	457	unsigned long length, dummy1;
	458	long dummy2;
	459	wxString id = chosenFormat.GetId();
	460
	461	while( ( retval = XmClipboardInquireLength( xdisplay, xwindow,
	462	wxConstCast(id.c_str(), char),
	463	&length ) )
	464	== XmClipboardLocked );
	465	if( retval != XmClipboardSuccess )
	466	return false;
	467
	468	wxCharBuffer buf(length);
	469
	470	while( ( retval = XmClipboardRetrieve( xdisplay, xwindow,
	471	wxConstCast(id.c_str(), char),
	472	(XtPointer)buf.data(),
	473	length, &dummy1, &dummy2 ) )
	474	== XmClipboardLocked );
	475	if( retval != XmClipboardSuccess )
	476	return false;
	477
	478	if( !data.SetData( chosenFormat, length, buf.data() ) )
	479	return false;
	480
	481	return true;
	482	}
	483
	484	#endif // wxUSE_CLIPBOARD