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ProcessCopy.cpp
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// ProcessCopy.cpp: implementation of the CProcessCopy class.
//
//////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "CP_Main.h"
#include "ProcessCopy.h"
#include "DatabaseUtilities.h"
#include ".\processcopy.h"
#include <Mmsystem.h>
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
/*----------------------------------------------------------------------------*\
COleDataObjectEx
\*----------------------------------------------------------------------------*/
HGLOBAL COleDataObjectEx::GetGlobalData(CLIPFORMAT cfFormat, LPFORMATETC lpFormatEtc)
{
HGLOBAL hGlobal = COleDataObject::GetGlobalData(cfFormat, lpFormatEtc);
if( hGlobal )
{
if( !::IsValid(hGlobal) )
{
LOG( StrF(
"COleDataObjectEx::GetGlobalData(\"%s\"): ERROR: Invalid (NULL) data returned.",
GetFormatName(cfFormat) ) );
::GlobalFree( hGlobal );
hGlobal = NULL;
}
return hGlobal;
}
// The data isn't in global memory, so try getting an IStream interface to it.
STGMEDIUM stg;
if( !GetData(cfFormat, &stg) )
{
return 0;
}
switch(stg.tymed)
{
case TYMED_HGLOBAL:
hGlobal = stg.hGlobal;
break;
case TYMED_ISTREAM:
{
UINT uDataSize;
LARGE_INTEGER li;
ULARGE_INTEGER uli;
li.HighPart = li.LowPart = 0;
if ( SUCCEEDED( stg.pstm->Seek ( li, STREAM_SEEK_END, &uli )))
{
hGlobal = GlobalAlloc(GMEM_MOVEABLE | GMEM_SHARE, uli.LowPart );
void* pv = GlobalLock(hGlobal);
stg.pstm->Seek(li, STREAM_SEEK_SET, NULL);
HRESULT result = stg.pstm->Read(pv, uli.LowPart, (PULONG)&uDataSize);
GlobalUnlock(hGlobal);
if( FAILED(result) )
hGlobal = GlobalFree(hGlobal);
}
break; // case TYMED_ISTREAM
}
} // end switch
ReleaseStgMedium(&stg);
if( hGlobal && !::IsValid(hGlobal) )
{
LOG( StrF(
"COleDataObjectEx::GetGlobalData(\"%s\"): ERROR: Invalid (NULL) data returned.",
GetFormatName(cfFormat) ) );
::GlobalFree( hGlobal );
hGlobal = NULL;
}
return hGlobal;
}
/*----------------------------------------------------------------------------*\
CClipFormat - holds the data of one clip format.
\*----------------------------------------------------------------------------*/
CClipFormat::CClipFormat(CLIPFORMAT cfType, HGLOBAL hgData)
{
m_cfType = cfType;
m_hgData = hgData;
bDeleteData = true;
}
CClipFormat::~CClipFormat()
{
Free();
}
void CClipFormat::Clear()
{
m_cfType = 0;
m_hgData = 0;
}
void CClipFormat::Free()
{
if(bDeleteData)
{
if(m_hgData)
{
m_hgData = ::GlobalFree( m_hgData );
m_hgData = NULL;
}
}
}
/*----------------------------------------------------------------------------*\
CClipFormats - holds an array of CClipFormat
\*----------------------------------------------------------------------------*/
// returns a pointer to the CClipFormat in this array which matches the given type
// or NULL if that type doesn't exist in this array.
CClipFormat* CClipFormats::FindFormat( UINT cfType )
{
CClipFormat* pCF;
int count = GetSize();
for( int i=0; i < count; i++ )
{
pCF = &ElementAt(i);
if( pCF->m_cfType == cfType )
return pCF;
}
return NULL;
}
/*----------------------------------------------------------------------------*\
CClip - holds multiple CClipFormats and CopyClipboard() statistics
\*----------------------------------------------------------------------------*/
CClip::CClip() :
m_ID(0),
m_DataID(0),
m_lTotalCopySize(0)
{
}
CClip::~CClip()
{
EmptyFormats();
}
void CClip::Clear()
{
m_ID = 0;
m_Time = 0;
m_Desc = "";
m_lTotalCopySize = 0;
m_DataID = 0;
EmptyFormats();
}
const CClip& CClip::operator=(const CClip &clip)
{
const CClipFormat* pCF;
m_ID = clip.m_ID;
m_DataID = clip.m_DataID;
m_Time = clip.m_Time;
m_lTotalCopySize = clip.m_lTotalCopySize;
int nCount = clip.m_Formats.GetSize();
for(int i = 0; i < nCount; i++)
{
pCF = &clip.m_Formats.GetData()[i];
LPVOID pvData = GlobalLock(pCF->m_hgData);
if(pvData)
{
AddFormat(pCF->m_cfType, pvData, GlobalSize(pCF->m_hgData));
}
GlobalUnlock(pCF->m_hgData);
}
//Set this after since in could get the wrong description in AddFormat
m_Desc = clip.m_Desc;
return *this;
}
void CClip::EmptyFormats()
{
// free global memory in m_Formats
for( int i = m_Formats.GetSize()-1; i >= 0; i-- )
{
m_Formats[i].Free();
m_Formats.RemoveAt( i );
}
}
// Adds a new Format to this Clip by copying the given data.
bool CClip::AddFormat( CLIPFORMAT cfType, void* pData, UINT nLen )
{
ASSERT( pData && nLen );
HGLOBAL hGlobal = ::NewGlobalP( pData, nLen );
ASSERT( hGlobal );
// update the Clip statistics
m_Time = m_Time.GetCurrentTime();
m_lTotalCopySize += nLen;
if( !SetDescFromText( hGlobal ) )
SetDescFromType();
CClipFormat format(cfType,hGlobal);
CClipFormat *pFormat;
pFormat = m_Formats.FindFormat(cfType);
// if the format type already exists as part of this clip, replace the data
if( pFormat )
{
pFormat->Free();
pFormat->m_hgData = format.m_hgData;
}
else
m_Formats.Add(format);
format.m_hgData = 0; // now owned by m_Formats
return true;
}
#define EXIT_LoadFromClipboard(ret) { oleData.Release(); g_bCopyingClipboard = false; return(ret); }
bool g_bCopyingClipboard = false; // for debugging reentrance
// Fills this CClip with the contents of the clipboard.
bool CClip::LoadFromClipboard( CClipTypes* pClipTypes )
{
COleDataObjectEx oleData;
CClipTypes defaultTypes;
CClipTypes* pTypes = pClipTypes;
//ASSERT( !g_bCopyingClipboard );
// For some reason, this can actually happen with *very* fast copies.
// This is probably due to the OLE functions processing messages.
// This *might* be able to be avoided by directly using the win32 Clipboard API
// If this does happen, we just ignore the request by returning failure.
if( g_bCopyingClipboard )
return false;
g_bCopyingClipboard = true;
// m_Formats should be empty when this is called.
ASSERT( m_Formats.GetSize() == 0 );
// If the data is supposed to be private, then return
if( ::IsClipboardFormatAvailable( theApp.m_cfIgnoreClipboard ) )
EXIT_LoadFromClipboard( false );
//Attach to the clipboard
if( !oleData.AttachClipboard() )
{
ASSERT(0); // does this ever happen?
EXIT_LoadFromClipboard(false);
}
oleData.EnsureClipboardObject();
// if no types were given, get only the first (most important) type.
// (subsequent types could be synthetic due to automatic type conversions)
if( pTypes == NULL || pTypes->GetSize() == 0 )
{
ASSERT(0); // this feature is not currently used... it is an error if it is.
FORMATETC formatEtc;
oleData.BeginEnumFormats();
oleData.GetNextFormat(&formatEtc);
defaultTypes.Add( formatEtc.cfFormat );
pTypes = &defaultTypes;
}
// reset copy stats
m_lTotalCopySize = 0;
m_Desc = "[Ditto Error] BAD DESCRIPTION";
// Get Description String
// NOTE: We make sure that the description always corresponds to the
// data saved by using the exact same globalmem instance as the source
// for both... i.e. we only fetch the description format type once.
CClipFormat cfDesc;
bool bIsDescSet = false;
cfDesc.m_cfType = CF_TEXT;
if( oleData.IsDataAvailable( cfDesc.m_cfType ) )
{
cfDesc.m_hgData = oleData.GetGlobalData( cfDesc.m_cfType );
bIsDescSet = SetDescFromText( cfDesc.m_hgData );
}
// Get global data for each supported type on the clipboard
UINT nSize;
CClipFormat cf;
int numTypes = pTypes->GetSize();
for(int i = 0; i < numTypes; i++)
{
cf.m_cfType = pTypes->ElementAt(i);
// is this the description we already fetched?
if( cf.m_cfType == cfDesc.m_cfType )
{
cf = cfDesc;
cfDesc.m_hgData = 0; // cf owns it now (to go into m_Formats)
}
else if( !oleData.IsDataAvailable(cf.m_cfType) )
continue;
else
cf.m_hgData = oleData.GetGlobalData( cf.m_cfType );
if( cf.m_hgData )
{
nSize = GlobalSize( cf.m_hgData );
if( nSize > 0 )
{
if(g_Opt.m_lMaxClipSizeInBytes > 0 &&
nSize > g_Opt.m_lMaxClipSizeInBytes)
{
CString cs;
cs.Format("Maximum clip size reached max size = %d, clip size = %d", g_Opt.m_lMaxClipSizeInBytes, nSize);
Log(cs);
EXIT_LoadFromClipboard(false);
}
ASSERT( ::IsValid(cf.m_hgData) );
m_Formats.Add( cf );
m_lTotalCopySize += nSize;
}
else
{
ASSERT(FALSE); // a valid GlobalMem with 0 size is strange
cf.Free();
}
cf.m_hgData = 0; // m_Formats owns it now
}
}
m_Time = CTime::GetCurrentTime();
if( !bIsDescSet )
SetDescFromType();
// if the description was in a type that is not supported,
// we have to free it since it wasn't added to m_Formats
if( cfDesc.m_hgData )
cfDesc.Free();
if( m_Formats.GetSize() == 0 )
EXIT_LoadFromClipboard( false );
EXIT_LoadFromClipboard( true );
}
bool CClip::SetDescFromText( HGLOBAL hgData )
{
if( hgData == 0 )
return false;
bool bRet = false;
char* text = (char *) GlobalLock(hgData);
long ulBufLen = GlobalSize(hgData);
ASSERT( text != NULL );
if( ulBufLen > g_Opt.m_bDescTextSize )
ulBufLen = g_Opt.m_bDescTextSize;
if( ulBufLen > 0 )
{
char* buf = m_Desc.GetBuffer(ulBufLen);
memcpy(buf, text, ulBufLen); // in most cases, last char == null
buf[ulBufLen-1] = '\0'; // just in case not null terminated
m_Desc.ReleaseBuffer(); // scans for the null
bRet = m_Desc.GetLength() > 0;
}
//Unlock the data
GlobalUnlock(hgData);
return bRet;
}
bool CClip::SetDescFromType()
{
if( m_Formats.GetSize() <= 0 )
return false;
m_Desc = GetFormatName( m_Formats[0].m_cfType );
return m_Desc.GetLength() > 0;
}
bool CClip::AddToDB( bool bCheckForDuplicates )
{
bool bResult;
try
{
if( bCheckForDuplicates )
{
CMainTable recset;
if( FindDuplicate( recset, g_Opt.m_bAllowDuplicates ) )
{
m_ID = recset.m_lID;
recset.Edit();
recset.m_lDate = (long) m_Time.GetTime(); // update the copy Time
recset.Update();
recset.Close();
EmptyFormats(); // delete this clip's data from memory.
return true;
}
if( recset.IsOpen() )
recset.Close();
}
}
CATCHDAO
// AddToDataTable must go first in order to assign m_DataID
bResult = AddToDataTable() && AddToMainTable();
if(bResult)
{
if(g_Opt.m_csPlaySoundOnCopy.GetLength() > 0)
PlaySound(g_Opt.m_csPlaySoundOnCopy, NULL, SND_FILENAME|SND_ASYNC);
}
// should be emptied by AddToDataTable
ASSERT( m_Formats.GetSize() == 0 );
return bResult;
}
//bool CClip::CheckForMaxSize()
//{
// try
// {
// CClipFormat* pCF;
//
// for( int i = m_Formats.GetSize()-1; i >= 0 ; i-- )
// {
// pCF = &m_Formats.ElementAt(i);
//
// LPVOID pvData = GlobalLock(pCF->m_hgData);
// if(pvData)
// {
// GlobalSize(pCF->m_hgData)
// }
// GlobalUnlock(pCF->m_hgData);
//
// }
// }
// CATCHDAO
//
// return false;
//}
// if a duplicate exists, set recset to the duplicate and return true
bool CClip::FindDuplicate( CMainTable& recset, BOOL bCheckLastOnly )
{
ASSERT( m_lTotalCopySize > 0 );
try
{
recset.m_strSort = "lDate DESC";
if( bCheckLastOnly )
{
recset.Open("SELECT * FROM Main");
if(recset.IsEOF())
return false;
recset.MoveFirst();
// if an entry exists and they are the same size and the format data matches
if( !recset.IsBOF() && !recset.IsEOF() &&
m_lTotalCopySize == recset.m_lTotalCopySize &&
(CompareFormatDataTo(recset.m_lDataID) == 0) )
{ return true; }
return false;
}
// Look for any other entries that have the same size
recset.Open("SELECT * FROM Main WHERE lTotalCopySize = %d", m_lTotalCopySize);
while( !recset.IsEOF() )
{
//if there is any then look if it is an exact match
if( CompareFormatDataTo(recset.m_lDataID) == 0 )
return true;
recset.MoveNext();
}
}
CATCHDAO
return false;
}
int CClip::CompareFormatDataTo( long lDataID )
{
int nRet = 0;
int nRecs=0, nFormats=0;
CClipFormat* pFormat = NULL;
try
{
CDataTable recset;
recset.Open("SELECT * FROM Data WHERE lDataID = %d", lDataID);
if( !recset.IsBOF() && !recset.IsEOF() )
{
// Verify the same number of saved types
recset.MoveLast();
nRecs = recset.GetRecordCount();
}
nFormats = m_Formats.GetSize();
nRet = nFormats - nRecs;
if( nRet != 0 || nRecs == 0 )
{ recset.Close(); return nRet; }
// For each format type in the db
for( recset.MoveFirst(); !recset.IsEOF(); recset.MoveNext() )
{
pFormat = m_Formats.FindFormat( GetFormatID(recset.m_strClipBoardFormat) );
// Verify the format exists
if( !pFormat )
{ recset.Close(); return -1; }
// Compare the size
nRet = ::GlobalSize(pFormat->m_hgData) - recset.m_ooData.m_dwDataLength;
if( nRet != 0 )
{ recset.Close(); return nRet; }
// Binary compare
nRet = CompareGlobalHH( recset.m_ooData.m_hData,
pFormat->m_hgData,
recset.m_ooData.m_dwDataLength );
if( nRet != 0 )
{ recset.Close(); return nRet; }
}
recset.Close();
}
CATCHDAO
return 0;
}
// assigns m_ID
bool CClip::AddToMainTable()
{
long lDate;
try
{
CMainTable recset;
// recset.m_strSort = "lDate DESC";
recset.Open("SELECT * FROM Main");
lDate = (long) m_Time.GetTime();
recset.AddNew(); // overridden to set m_lID to the new autoincr number
m_ID = recset.m_lID;
recset.m_lDate = lDate;
recset.m_strText = m_Desc;
recset.m_lTotalCopySize = m_lTotalCopySize;
recset.m_bIsGroup = FALSE;
recset.m_lParentID = theApp.m_GroupDefaultID;
VERIFY( m_DataID > 0 ); // AddToDataTable must be called first to assign this
recset.m_lDataID = m_DataID;
recset.Update();
// recset.SetBookmark( recset.GetLastModifiedBookmark() );
// m_ID = recset.m_lID;
recset.Close();
}
catch(CDaoException* e)
{
ASSERT(FALSE);
e->Delete();
return false;
}
return true;
}
// Empties m_Formats as it saves them to the Data Table.
bool CClip::AddToDataTable()
{
VERIFY( m_DataID <= 0 ); // this func will assign m_DataID
try
{
CClipFormat* pCF;
CDataTable recset;
recset.Open(dbOpenTable,"Data");
for( int i = m_Formats.GetSize()-1; i >= 0 ; i-- )
{
pCF = & m_Formats.ElementAt(i);
recset.AddNew(); // overridden to assign new autoincr ID to m_lID
if( m_DataID <= 0 )
{
VERIFY( recset.m_lID > 0 );
m_DataID = recset.m_lID;
}
recset.m_lDataID = m_DataID;
recset.m_strClipBoardFormat = GetFormatName( pCF->m_cfType );
// the recset takes ownership of the HGLOBAL
recset.ReplaceData( pCF->m_hgData, GlobalSize(pCF->m_hgData) );
recset.Update();
m_Formats.RemoveAt( i ); // the recset now owns the global
}
recset.Close();
return true;
}
CATCHDAO
return false;
}
// changes m_Time to be later than the latest clip entry in the db
// ensures that pClip's time is not older than the last clip added
// old times can happen on fast copies (<1 sec).
void CClip::MakeLatestTime()
{
long lDate;
try
{
CMainTable recset;
recset.m_strSort = "lDate DESC";
recset.Open("SELECT * FROM Main");
if(!recset.IsEOF())
{
recset.MoveFirst();
lDate = (long) m_Time.GetTime();
if( lDate <= recset.m_lDate )
{
lDate = recset.m_lDate + 1;
m_Time = lDate;
}
}
recset.Close();
}
CATCHDAO
}
// STATICS
// Allocates a Global containing the requested Clip Format Data
HGLOBAL CClip::LoadFormat( long lID, UINT cfType )
{
HGLOBAL hGlobal = 0;
try
{
CDataTable recset;
CString csSQL;
csSQL.Format(
"SELECT Data.* FROM Data "
"INNER JOIN Main ON Main.lDataID = Data.lDataID "
"WHERE Main.lID = %d "
"AND Data.strClipBoardFormat = \'%s\'",
lID,
GetFormatName(cfType));
recset.Open(AFX_DAO_USE_DEFAULT_TYPE, csSQL);
if( !recset.IsBOF() && !recset.IsEOF() )
{
// create a new HGLOBAL duplicate
hGlobal = NewGlobalH( recset.m_ooData.m_hData, recset.m_ooData.m_dwDataLength );
// XOR take the recset's HGLOBAL... is this SAFE??
// hGlobal = recset.TakeData();
if( !hGlobal || ::GlobalSize(hGlobal) == 0 )
{
TRACE0( GetErrorString(::GetLastError()) );
//::_RPT0( _CRT_WARN, GetErrorString(::GetLastError()) );
ASSERT(FALSE);
}
}
recset.Close();
}
CATCHDAO
return hGlobal;
}
bool CClip::LoadFormats( long lID, CClipFormats& formats, bool bOnlyLoad_CF_TEXT)
{
CClipFormat cf;
HGLOBAL hGlobal = 0;
formats.RemoveAll();
try
{
CDataTable recset;
//Open the data table for all that have the parent id
CString csSQL;
csSQL.Format(
"SELECT Data.* FROM Data "
"INNER JOIN Main ON Main.lDataID = Data.lDataID "
"WHERE Main.lID = %d", lID);
recset.Open(AFX_DAO_USE_DEFAULT_TYPE, csSQL);
while( !recset.IsEOF() )
{
cf.m_cfType = GetFormatID( recset.m_strClipBoardFormat );
if(bOnlyLoad_CF_TEXT)
{
if(cf.m_cfType != CF_TEXT)
{
recset.MoveNext();
continue;
}
}
// create a new HGLOBAL duplicate
hGlobal = NewGlobalH( recset.m_ooData.m_hData, recset.m_ooData.m_dwDataLength );
// XOR take the recset's HGLOBAL... is this SAFE??
// hGlobal = recset.TakeData();
if( !hGlobal || ::GlobalSize(hGlobal) == 0 )
{
TRACE0( GetErrorString(::GetLastError()) );
//::_RPT0( _CRT_WARN, GetErrorString(::GetLastError()) );
ASSERT(FALSE);
}
cf.m_hgData = hGlobal;
formats.Add( cf );
recset.MoveNext();
}
cf.m_hgData = 0; // formats owns all the data
recset.Close();
}
CATCHDAO
return formats.GetSize() > 0;
}
void CClip::LoadTypes( long lID, CClipTypes& types )
{
types.RemoveAll();
try
{
CDataTable recset;
CString csSQL;
// get formats for Clip "lID" (Main.lID) using the corresponding Main.lDataID
csSQL.Format(
"SELECT Data.* FROM Data "
"INNER JOIN Main ON Main.lDataID = Data.lDataID "
"WHERE Main.lID = %d", lID);
recset.Open(AFX_DAO_USE_DEFAULT_TYPE, csSQL);
while( !recset.IsEOF() )
{
types.Add( GetFormatID( recset.m_strClipBoardFormat ) );
recset.MoveNext();
}
recset.Close();
}
CATCHDAO
}
/*----------------------------------------------------------------------------*\
CClipList
\*----------------------------------------------------------------------------*/
CClipList::~CClipList()
{
CClip* pClip;
while( GetCount() )
{
pClip = RemoveHead();
DELETE_PTR( pClip );
}
}
// returns the number of clips actually saved
// while this does empty the Format Data, it does not delete the Clips.
int CClipList::AddToDB( bool bLatestTime, bool bShowStatus )
{
int savedCount = 0;
int nRemaining = 0;
CClip* pClip;
POSITION pos;
bool bResult;
nRemaining = GetCount();
pos = GetHeadPosition();
while( pos )
{
if( bShowStatus )
{
theApp.SetStatus( StrF("%d",nRemaining), true );
nRemaining--;
}
pClip = GetNext( pos );
ASSERT( pClip );
if( bLatestTime )
pClip->MakeLatestTime();
bResult = pClip->AddToDB();
if( bResult )
savedCount++;
}
if( bShowStatus )
theApp.SetStatus(NULL, true);
return savedCount;
}
const CClipList& CClipList::operator=(const CClipList &cliplist)
{
POSITION pos;
CClip* pClip;
pos = cliplist.GetHeadPosition();
while(pos)
{
pClip = cliplist.GetNext(pos);
ASSERT(pClip);
CClip *pNewClip = new CClip;
if(pNewClip)
{
*pNewClip = *pClip;
AddTail(pNewClip);
}
}
return *this;
}
/*----------------------------------------------------------------------------*\
CClipboardViewer
\*----------------------------------------------------------------------------*/
IMPLEMENT_DYNAMIC(CClipboardViewer, CWnd)
BEGIN_MESSAGE_MAP(CClipboardViewer, CWnd)
//{{AFX_MSG_MAP(CClipboardViewer)
ON_WM_CREATE()
ON_WM_CHANGECBCHAIN()
ON_WM_DRAWCLIPBOARD()
ON_WM_TIMER()
//}}AFX_MSG_MAP
ON_MESSAGE(WM_CV_GETCONNECT, OnCVGetConnect)
ON_MESSAGE(WM_CV_SETCONNECT, OnCVSetConnect)
ON_MESSAGE(WM_CV_IS_CONNECTED, OnCVIsConnected)
ON_WM_DESTROY()
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CClipboardViewer construction/destruction
CClipboardViewer::CClipboardViewer( CCopyThread* pHandler )
{
m_hNextClipboardViewer = 0;
m_bCalling_SetClipboardViewer = false;
m_lReconectCount = 0;
m_bIsConnected = false;
m_bConnect = false;
m_pHandler = pHandler;
ASSERT(m_pHandler);
m_bPinging = false;
m_bPingSuccess = false;
}
CClipboardViewer::~CClipboardViewer()
{
}
void CClipboardViewer::Create()
{
CString strParentClass = AfxRegisterWndClass(0);
CWnd::CreateEx(0, strParentClass, "Ditto Clipboard Viewer", 0, -1, -1, 0, 0, 0, 0);
SetConnect( true );
}
// connects as a clipboard viewer
void CClipboardViewer::Connect()
{
// if( m_bIsConnected )
// return;
ASSERT( ::IsWindow(m_hWnd) );
//Set up the clip board viewer
m_bCalling_SetClipboardViewer = true;
m_hNextClipboardViewer = CWnd::SetClipboardViewer();
m_bCalling_SetClipboardViewer = false;
m_bIsConnected = SendPing();
// verify that we are in the chain every minute
SetTimer(TIMER_ENSURE_VIEWER_IN_CHAIN, ONE_MINUTE, 0);
}
// disconnects as a clipboard viewer
void CClipboardViewer::Disconnect()
{
// if( !m_bIsConnected )
// return;
ASSERT( ::IsWindow(m_hWnd) );
KillTimer(TIMER_ENSURE_VIEWER_IN_CHAIN);
CWnd::ChangeClipboardChain( m_hNextClipboardViewer );
m_hNextClipboardViewer = 0;
m_bIsConnected = false;
}
bool CClipboardViewer::SendPing()
{
HWND hWnd;
bool bResult = false;
hWnd = ::GetClipboardViewer();
// if there is a chain
if( ::IsWindow(hWnd) )
{
m_bPingSuccess = false;
m_bPinging = true;
::SendMessage( hWnd, WM_DRAWCLIPBOARD, 0, 0 );
m_bPinging = false;
bResult = m_bPingSuccess;
}
m_bIsConnected = bResult;
return bResult;
}
bool CClipboardViewer::EnsureConnected()
{
if( !SendPing() )
Connect();
return m_bIsConnected;
}
// puts format "Clipboard Viewer Ignore" on the clipboard
void CClipboardViewer::SetCVIgnore()
{
if( ::OpenClipboard( m_hWnd ) )
{
::SetClipboardData( theApp.m_cfIgnoreClipboard, NULL );
::CloseClipboard();
}
}
void CClipboardViewer::SetConnect( bool bConnect )
{
m_bConnect = bConnect;
if( m_bConnect )
EnsureConnected();
else
Disconnect();
}
/////////////////////////////////////////////////////////////////////////////
// CClipboardViewer message handlers