src/motif/clipbrd.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/motif/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
/////////////////////////////////////////////////////////////////////////////

// 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

#if wxUSE_CLIPBOARD

#include "wx/clipbrd.h"

#ifndef WX_PRECOMP
    #include "wx/app.h"
    #include "wx/utils.h"
    #include "wx/bitmap.h"
    #include "wx/dataobj.h"
#endif

#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(const 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(const 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(const 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)

extern "C"
{
#if wxCHECK_LESSTIF()
static void wxClipboardCallback( Widget widget, int* data_id,
                                 int* priv, int* reason );
#else // Motif
static void wxClipboardCallback( Widget widget, long* data_id,
                                 long* priv, int* reason );
#endif // Less/Motif
}

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 node2->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* WXUNUSED(reason) )
#else
void wxClipboardCallback( Widget xwidget, long* data_id,
                          long* priv, int* WXUNUSED(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.mb_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.mb_str(), char),
                                                &length ) )
           == XmClipboardLocked );
    if( retval != XmClipboardSuccess )
        return false;

    wxCharBuffer buf(length);

    while( ( retval = XmClipboardRetrieve( xdisplay, xwindow,
                                           wxConstCast(id.mb_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: src/motif/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	// For compilers that support precompilation, includes "wx.h".
	13	#include "wx/wxprec.h"
	14
	15	#ifdef __VMS
	16	#include "wx/vms_x_fix.h"
	17	#define XtWindow XTWINDOW
	18	#define XtScreen XTSCREEN
	19	#define XtParent XTPARENT
	20	#define XtIsRealized XTISREALIZED
	21	#define XtDisplay XTDISPLAY
	22	#endif
	23
	24	#if wxUSE_CLIPBOARD
	25
	26	#include "wx/clipbrd.h"
	27
	28	#ifndef WX_PRECOMP
	29	#include "wx/app.h"
	30	#include "wx/utils.h"
	31	#include "wx/bitmap.h"
	32	#include "wx/dataobj.h"
	33	#endif
	34
	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(const 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(const 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(const 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	extern "C"
	177	{
	178	#if wxCHECK_LESSTIF()
	179	static void wxClipboardCallback( Widget widget, int* data_id,
	180	int* priv, int* reason );
	181	#else // Motif
	182	static void wxClipboardCallback( Widget widget, long* data_id,
	183	long* priv, int* reason );
	184	#endif // Less/Motif
	185	}
	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	{
	212	delete node2->GetData();
	213	}
	214	m_idToObject.Clear();
	215	}
	216
	217	bool wxClipboard::Open()
	218	{
	219	wxCHECK_MSG( !m_open, false, "clipboard already open" );
	220
	221	m_open = true;
	222
	223	return true;
	224	}
	225
	226	bool wxClipboard::SetData( wxDataObject *data )
	227	{
	228	wxCHECK_MSG( data, false, "data is invalid" );
	229	wxCHECK_MSG( m_open, false, "clipboard not open" );
	230
	231	Clear();
	232
	233	return AddData( data );
	234	}
	235
	236	wxDECLARE_SCOPED_ARRAY( wxDataFormat, wxDataFormatScopedArray )
	237	wxDEFINE_SCOPED_ARRAY( wxDataFormat, wxDataFormatScopedArray )
	238
	239	#if wxCHECK_LESSTIF()
	240	void wxClipboardCallback( Widget xwidget, int* data_id,
	241	int* priv, int* WXUNUSED(reason) )
	242	#else
	243	void wxClipboardCallback( Widget xwidget, long* data_id,
	244	long* priv, int* WXUNUSED(reason) )
	245	#endif
	246	{
	247	Display* xdisplay = XtDisplay( xwidget );
	248	Window xwindow = XtWindow( xwidget );
	249	wxDataObject* dobj = NULL;
	250	size_t size = 0;
	251
	252	for( wxDataIdToDataObjectList::compatibility_iterator node2 =
	253	wxTheClipboard->m_idToObject.GetFirst();
	254	node2; node2 = node2->GetNext() )
	255	{
	256	wxDataIdToDataObject* dido = node2->GetData();
	257	if( dido->dataId == *data_id )
	258	{
	259	dobj = dido->object;
	260	size = dido->size;
	261	break;
	262	}
	263	}
	264
	265	if( !dobj ) return;
	266
	267	wxCharBuffer buffer(size);
	268	size_t count = dobj->GetFormatCount( wxDataObject::Get );
	269	wxDataFormatScopedArray dfarr( new wxDataFormat[count] );
	270	dobj->GetAllFormats( dfarr.get(), wxDataObject::Get );
	271
	272	if( !dobj->GetDataHere( dfarr[*priv], buffer.data() ) )
	273	return;
	274
	275	while( XmClipboardCopyByName( xdisplay, xwindow, *data_id,
	276	buffer.data(), size, 0 )
	277	== XmClipboardLocked );
	278	}
	279
	280	bool wxClipboard::AddData( wxDataObject *data )
	281	{
	282	wxCHECK_MSG( data, false, "data is invalid" );
	283	wxCHECK_MSG( m_open, false, "clipboard not open" );
	284
	285	m_data.Append( data );
	286
	287	Display* xdisplay = wxGlobalDisplay();
	288	Widget xwidget = (Widget)wxTheApp->GetTopLevelRealizedWidget();
	289	Window xwindow = XtWindow( xwidget );
	290	wxXmString label( wxTheApp->GetAppName() );
	291	Time timestamp = XtLastTimestampProcessed( xdisplay );
	292	long itemId;
	293
	294	int retval;
	295
	296	while( ( retval = XmClipboardStartCopy( xdisplay, xwindow, label(),
	297	timestamp, xwidget,
	298	wxClipboardCallback,
	299	&itemId ) )
	300	== XmClipboardLocked );
	301	if( retval != XmClipboardSuccess )
	302	return false;
	303
	304	size_t count = data->GetFormatCount( wxDataObject::Get );
	305	wxDataFormatScopedArray dfarr( new wxDataFormat[count] );
	306	data->GetAllFormats( dfarr.get(), wxDataObject::Get );
	307
	308	for( size_t i = 0; i < count; ++i )
	309	{
	310	size_t size = data->GetDataSize( dfarr[i] );
	311	long data_id;
	312	wxString id = dfarr[i].GetId();
	313
	314	while( ( retval = XmClipboardCopy( xdisplay, xwindow, itemId,
	315	wxConstCast(id.mb_str(), char),
	316	NULL, size, i, &data_id ) )
	317	== XmClipboardLocked );
	318
	319	m_idToObject.Append( new wxDataIdToDataObject( data, data_id, size ) );
	320	}
	321
	322	while( XmClipboardEndCopy( xdisplay, xwindow, itemId )
	323	== XmClipboardLocked );
	324
	325	return true;
	326	}
	327
	328	void wxClipboard::Close()
	329	{
	330	wxCHECK_RET( m_open, "clipboard not open" );
	331
	332	m_open = false;
	333	}
	334
	335	bool wxClipboard::IsSupported(const wxDataFormat& format)
	336	{
	337	Display* xdisplay = wxGlobalDisplay();
	338	Window xwindow = XtWindow( (Widget)wxTheApp->GetTopLevelRealizedWidget() );
	339	bool isSupported = false;
	340	int retval, count;
	341	unsigned long max_name_length;
	342	wxString id = format.GetId();
	343
	344	while( ( retval = XmClipboardLock( xdisplay, xwindow ) )
	345	== XmClipboardLocked );
	346	if( retval != XmClipboardSuccess )
	347	return false;
	348
	349	if( XmClipboardInquireCount( xdisplay, xwindow, &count, &max_name_length )
	350	== XmClipboardSuccess )
	351	{
	352	wxCharBuffer buf( max_name_length + 1 );
	353	unsigned long copied;
	354
	355	for( int i = 0; i < count; ++i )
	356	{
	357	if( XmClipboardInquireFormat( xdisplay, xwindow, i + 1,
	358	(XtPointer)buf.data(),
	359	max_name_length, &copied )
	360	!= XmClipboardSuccess )
	361	continue;
	362
	363	buf.data()[copied] = '\0';
	364
	365	if( buf == id )
	366	{
	367	isSupported = true;
	368	break;
	369	}
	370	}
	371	}
	372
	373	XmClipboardUnlock( xdisplay, xwindow, False );
	374
	375	return isSupported;
	376	}
	377
	378	class wxClipboardEndRetrieve
	379	{
	380	public:
	381	wxClipboardEndRetrieve( Display* display, Window window )
	382	: m_display( display ), m_window( window ) { }
	383	~wxClipboardEndRetrieve()
	384	{
	385	while( XmClipboardEndRetrieve( m_display, m_window )
	386	== XmClipboardLocked );
	387	}
	388	private:
	389	Display* m_display;
	390	Window m_window;
	391	};
	392
	393	bool wxClipboard::GetData( wxDataObject& data )
	394	{
	395	wxCHECK_MSG( m_open, false, "clipboard not open" );
	396
	397	Display* xdisplay = wxGlobalDisplay();
	398	Window xwindow = XtWindow( (Widget)wxTheApp->GetTopLevelRealizedWidget() );
	399	Time timestamp = XtLastTimestampProcessed( xdisplay );
	400
	401	wxDataFormat chosenFormat;
	402	int retval;
	403
	404	///////////////////////////////////////////////////////////////////////////
	405	// determine if the cliboard holds any format we like
	406	///////////////////////////////////////////////////////////////////////////
	407	while( ( retval = XmClipboardStartRetrieve( xdisplay, xwindow,
	408	timestamp ) )
	409	== XmClipboardLocked );
	410	if( retval != XmClipboardSuccess )
	411	return false;
	412
	413	wxClipboardEndRetrieve endRetrieve( xdisplay, xwindow );
	414
	415	int count;
	416	unsigned long max_name_length;
	417	size_t dfcount = data.GetFormatCount( wxDataObject::Set );
	418	wxDataFormatScopedArray dfarr( new wxDataFormat[dfcount] );
	419	data.GetAllFormats( dfarr.get(), wxDataObject::Set );
	420
	421	if( XmClipboardInquireCount( xdisplay, xwindow, &count, &max_name_length )
	422	== XmClipboardSuccess )
	423	{
	424	wxCharBuffer buf( max_name_length + 1 );
	425	unsigned long copied;
	426
	427	for( int i = 0; i < count; ++i )
	428	{
	429	if( XmClipboardInquireFormat( xdisplay, xwindow, i + 1,
	430	(XtPointer)buf.data(),
	431	max_name_length, &copied )
	432	!= XmClipboardSuccess )
	433	continue;
	434
	435	buf.data()[copied] = '\0';
	436
	437	// try preferred format
	438	if( buf == data.GetPreferredFormat( wxDataObject::Set ).GetId() )
	439	{
	440	chosenFormat = data.GetPreferredFormat( wxDataObject::Set );
	441	break;
	442	}
	443
	444	// try all other formats
	445	for( size_t i = 0; i < dfcount; ++i )
	446	{
	447	if( buf == dfarr[i].GetId() )
	448	chosenFormat = dfarr[i];
	449	}
	450	}
	451	}
	452
	453	if( chosenFormat == wxDF_INVALID )
	454	return false;
	455
	456	///////////////////////////////////////////////////////////////////////////
	457	// now retrieve the data
	458	///////////////////////////////////////////////////////////////////////////
	459	unsigned long length, dummy1;
	460	long dummy2;
	461	wxString id = chosenFormat.GetId();
	462
	463	while( ( retval = XmClipboardInquireLength( xdisplay, xwindow,
	464	wxConstCast(id.mb_str(), char),
	465	&length ) )
	466	== XmClipboardLocked );
	467	if( retval != XmClipboardSuccess )
	468	return false;
	469
	470	wxCharBuffer buf(length);
	471
	472	while( ( retval = XmClipboardRetrieve( xdisplay, xwindow,
	473	wxConstCast(id.mb_str(), char),
	474	(XtPointer)buf.data(),
	475	length, &dummy1, &dummy2 ) )
	476	== XmClipboardLocked );
	477	if( retval != XmClipboardSuccess )
	478	return false;
	479
	480	if( !data.SetData( chosenFormat, length, buf.data() ) )
	481	return false;
	482
	483	return true;
	484	}
	485
	486	#endif // wxUSE_CLIPBOARD