// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
// Copyright (C) 2010  Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

// branch_patcherDlg.cpp : implementation file
//

#include "stdafx.h"
#include "branch_patcher.h"
#include "branch_patcherDlg.h"
#include "shlobj.h"
#include "direct.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CBranch_patcherDlg dialog

extern CBranch_patcherApp theApp;

const CString TEMP_DIFF_FILE = "C:\\tempFile.diff";
const CString DIFF_ERRORS = "C:\\diffLog.txt";
const CString PATCH_RESULT = "C:\\patchResult.txt";
const CString PATCH_ERRORS = "C:\\patchErrors.txt";


CBranch_patcherDlg::CBranch_patcherDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CBranch_patcherDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CBranch_patcherDlg)
	m_SrcDir = _T("");
	m_DestDir = _T("");
	m_Filename = _T("");
	m_Tokens = _T("");
	m_SrcDirLabel = _T("");
	m_TargetDirLabel = _T("");
	//}}AFX_DATA_INIT
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	m_Display = NULL;
}

void CBranch_patcherDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CBranch_patcherDlg)
	DDX_Text(pDX, IDC_SRCDIR, m_SrcDir);
	DDX_Text(pDX, IDC_DESTDIR, m_DestDir);
	DDX_Text(pDX, IDC_Filename, m_Filename);
	DDX_Text(pDX, IDC_CurrentTokens, m_Tokens);
	DDX_Text(pDX, IDC_SrcDirLabel, m_SrcDirLabel);
	DDX_Text(pDX, IDC_TargetDirLabel, m_TargetDirLabel);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CBranch_patcherDlg, CDialog)
	//{{AFX_MSG_MAP(CBranch_patcherDlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_ButtonSetSrcDir, OnButtonSetSrcDir)
	ON_BN_CLICKED(IDC_ButtonSetDestDir, OnButtonSetDestDir)
	ON_BN_CLICKED(IDC_ButtonPatch, OnButtonPatch)
	ON_BN_CLICKED(IDC_DoPatch, OnDoPatch)
	ON_WM_SIZE()
	ON_WM_CLOSE()
	ON_BN_CLICKED(IDC_ButtonExtractTokens, OnButtonExtractTokens)
	ON_BN_CLICKED(IDC_ButtonClearTokens, OnButtonClearTokens)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CBranch_patcherDlg message handlers

BOOL CBranch_patcherDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// Extra initialization here

	RECT cltRect;
	GetClientRect( &cltRect ),
	m_Display = new CRichEditCtrl();
	m_Display->Create( WS_CHILD|WS_VISIBLE|WS_BORDER|WS_HSCROLL|WS_VSCROLL|ES_AUTOHSCROLL|ES_AUTOVSCROLL|ES_MULTILINE,
					   CRect( 20, 180, cltRect.right-20, cltRect.bottom-20 ), this, 1 );

	// Initialize directories
	loadConfiguration();
	processCommandLine();
	displayTokens();

	EnteringTokens = false;
	m_SrcDirLabel = "Source Dir";
	m_TargetDirLabel = "Target Dir";
	UpdateData( false );
	((CButton*)GetDlgItem( IDC_DoPatch ))->EnableWindow( FALSE );

	return TRUE;  // return TRUE  unless you set the focus to a control
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CBranch_patcherDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

HCURSOR CBranch_patcherDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}


void	CBranch_patcherDlg::setSrcDirectory( const CString& s )
{
	m_SrcDir = s;
	UpdateData( false );
}

void	CBranch_patcherDlg::setDestDirectory( const CString& s )
{
	m_DestDir = s;
	UpdateData( false );
}

void CBranch_patcherDlg::OnButtonSetSrcDir() 
{
	DirDialog.m_strTitle = "Please choose the SOURCE directory";
	if ( DirDialog.DoBrowse() == TRUE )
	{
		setSrcDirectory( DirDialog.m_strPath );
		guessDestDirectory();
	}
}

void CBranch_patcherDlg::OnButtonSetDestDir() 
{
	DirDialog.m_strTitle = "Please choose the TARGET directory";
	if ( DirDialog.DoBrowse() == TRUE )
	{
		setDestDirectory( DirDialog.m_strPath );
	}
}








CDirDialog::CDirDialog()
{////////////////////////////////////////////

}

CDirDialog::~CDirDialog()
{///////////////////////////////////////////

}

int CDirDialog::DoBrowse ()
{/////////////////////////////////////////

    LPMALLOC pMalloc;
    if (SHGetMalloc (&pMalloc)!= NOERROR)
    {
        return 0;
    }

    BROWSEINFO bInfo;
    LPITEMIDLIST pidl;
    ZeroMemory ( (PVOID) &bInfo,sizeof (BROWSEINFO));

     if (!m_strInitDir.IsEmpty ())
     {
          OLECHAR       olePath[MAX_PATH];
          ULONG         chEaten;
          ULONG         dwAttributes;
          HRESULT       hr;
          LPSHELLFOLDER pDesktopFolder;
          // // Get a pointer to the Desktop's IShellFolder interface. //
          if (SUCCEEDED(SHGetDesktopFolder(&pDesktopFolder)))
          {

               //
               // IShellFolder::ParseDisplayName requires the file name be in Unicode.
               //
               MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, m_strInitDir.GetBuffer (MAX_PATH), -1,
                    olePath, MAX_PATH);

               m_strInitDir.ReleaseBuffer (-1);
               //
               // Convert the path to an ITEMIDLIST.
               //
               hr = pDesktopFolder->ParseDisplayName(NULL,
                    NULL,
                    olePath,
                    &chEaten,
                    &pidl,
                    &dwAttributes);
               if (FAILED(hr))
               {
                    pMalloc ->Free (pidl);
                    pMalloc ->Release ();
                    return 0;
               }
               bInfo.pidlRoot = pidl;
          }
     }
          bInfo.hwndOwner = NULL;
          bInfo.pszDisplayName = m_strPath.GetBuffer (MAX_PATH);
          bInfo.lpszTitle = (m_strTitle.IsEmpty()) ? "Open":m_strTitle;
          bInfo.ulFlags = BIF_RETURNFSANCESTORS|BIF_RETURNONLYFSDIRS;


          if ((pidl = ::SHBrowseForFolder (&bInfo)) == NULL)
          {
               return 0;
          }
          m_strPath.ReleaseBuffer ();
          m_iImageIndex = bInfo.iImage;

          if (::SHGetPathFromIDList(pidl,m_strPath.GetBuffer (MAX_PATH)) == FALSE)
          {
               pMalloc ->Free (pidl);
               pMalloc ->Release ();
               return 0;
          }

    m_strPath.ReleaseBuffer ();

    pMalloc ->Free (pidl);
    pMalloc ->Release ();
     return 1;
}


/*
 * Adapted from function by Jonah Bishop <jonahb@nc.rr.com>
 */
BOOL SendTextToClipboard(CString source)
{
    // Return value is TRUE if the text was sent
    // Return value is FALSE if something went wrong
    if(OpenClipboard(NULL))
    {
        HGLOBAL clipbuffer;
        char* buffer;

        EmptyClipboard(); // Empty whatever's already there

        clipbuffer = GlobalAlloc(GMEM_DDESHARE, source.GetLength()+1);
        buffer = (char*)GlobalLock(clipbuffer);
        strcpy(buffer, LPCSTR(source));
        GlobalUnlock(clipbuffer);

        SetClipboardData(CF_TEXT, clipbuffer); // Send the data

        CloseClipboard(); // VERY IMPORTANT
        return TRUE;
    }
    return FALSE;
}


void CBranch_patcherDlg::displayMessage( const CString& msg, bool insertAtTop )
{
	if ( insertAtTop )
		m_Display->SetSel( 0, 0 );
	else
		m_Display->SetSel( 0, -1 );
	m_Display->ReplaceSel( msg );
	SaveDiff = false;
}


void CBranch_patcherDlg::OnButtonPatch() 
{
	UpdateData( true );

	CString diffCmdLine;
	diffCmdLine.Format( "cvs.exe diff -c > %s 2> %s", TEMP_DIFF_FILE, DIFF_ERRORS ); // needs a valid cvs login before! and cvs.exe in the path
	CString text;
	text.Format( "Get diff from directory %s?\n\nCommand (choose No to copy it into the clipboard):\n%s", m_SrcDir, diffCmdLine );
	int result;
	if ( (result = ::MessageBox( m_hWnd, text, "Confirmation", MB_YESNOCANCEL | MB_ICONQUESTION )) == IDYES )
	{
		if ( _chdir( m_SrcDir ) == 0 )
		{
			system( diffCmdLine );
			displayFile( TEMP_DIFF_FILE );
			SaveDiff = true;
			colorizeDiff();
			m_Display->LineScroll( 0 );
			((CButton*)GetDlgItem( IDC_DoPatch ))->EnableWindow( TRUE );

			if ( (m_Display->GetLineCount() == 0) ||
				 (m_Display->GetLineCount() == 1 && m_Display->LineLength(0)<2) )
			{
				displayFile( DIFF_ERRORS );
				displayMessage( "Diff is empty.\r\nIf this is not the expected result:\r\n- check if the source directory is part of a CVS tree\r\n- check if cvs.exe is in your PATH\r\n- check if you are logged to the cvs server with 'cvs login' (set your home cvs directory in the HOME environment variable if needed)\r\n- check if C:\\ has enough free space and access rights to write a file.\n\nHere is the log:\n\n", true );
			}
			else
			{
				m_Filename = TEMP_DIFF_FILE + ":";
				UpdateData( false );
			}
		}
		else
		{
			displayMessage( "Source directory not found" );
		}
	}
	else if ( result == IDNO )
	{
		SendTextToClipboard( diffCmdLine );
	}
}


static unsigned long CALLBACK MyStreamInCallback(DWORD_PTR dwCookie, LPBYTE pbBuff, LONG cb, LONG *pcb)
{
	CFile* pFile = (CFile*) dwCookie;
	*pcb = pFile->Read(pbBuff, cb);
	return 0;
}


static unsigned long CALLBACK MyStreamOutCallback(DWORD_PTR dwCookie, LPBYTE pbBuff, LONG cb, LONG *pcb)
{
	CFile* pFile = (CFile*) dwCookie;
	pFile->Write(pbBuff, cb);
	*pcb = cb;
	return 0;
}


void CBranch_patcherDlg::displayFile( const CString& filename )
{
	CFile cFile( filename, CFile::modeRead );
	EDITSTREAM es;
	es.dwCookie = (DWORD_PTR) &cFile;
	es.pfnCallback = MyStreamInCallback;
	m_Display->StreamIn( SF_TEXT, es );
}


void CBranch_patcherDlg::saveFile( const CString& filename )
{
	CFile cFile( filename, CFile::modeCreate | CFile::modeWrite );
	EDITSTREAM es;
	es.dwCookie = (DWORD_PTR) &cFile;
	es.pfnCallback = MyStreamOutCallback; 
	m_Display->StreamOut( SF_TEXT, es );
}


void CBranch_patcherDlg::colorizeDiff()
{
	CHARFORMAT blue;
	ZeroMemory( &blue, sizeof(blue) );
	blue.cbSize = sizeof(blue);
	blue.dwMask = CFM_COLOR;
	blue.crTextColor = RGB(0,0,0xFF);
	CHARFORMAT red;
	ZeroMemory( &red, sizeof(red) );
	red.cbSize = sizeof(red);
	red.dwMask = CFM_COLOR;
	red.crTextColor = RGB(0xFF,0,0);
	CHARFORMAT green;
	ZeroMemory( &green, sizeof(green) );
	green.cbSize = sizeof(green);
	green.dwMask = CFM_COLOR;
	green.crTextColor = RGB(0,0x7F,0);
	for ( int i=0; i!=m_Display->GetLineCount(); ++i )
	{
		int c = m_Display->LineIndex( i );
		int l = m_Display->LineLength( c );
		m_Display->SetSel( c, c+l );
		CString s = m_Display->GetSelText();
		if ( ! s.IsEmpty() )
		{
			if ( s.Left(2) == "+ " )
			{
				m_Display->SetSelectionCharFormat( blue );
			}
			else if ( s.Left(2) == "- " )
			{
				m_Display->SetSelectionCharFormat( red );
			}
			else if ( s.Left(2) == "! " )
			{
				m_Display->SetSelectionCharFormat( green );
			}
		}
	}
}


void CBranch_patcherDlg::OnDoPatch() 
{
	UpdateData( true );
	
	if ( SaveDiff )
	{
		// Save the diff from the richedit
		saveFile( TEMP_DIFF_FILE );
	}

	// Apply the patch
	CString patchCmdLine, concatOutput, delPatchErrors;
	patchCmdLine.Format(_T("%spatch.exe -c -p%u --verbose < %s > %s 2> %s"), PatchExeDir, CvsDiffDirLevel, TEMP_DIFF_FILE, PATCH_RESULT, PATCH_ERRORS); // needs patch.exe in the path
	concatOutput.Format(_T("copy %s+%s %s"), PATCH_RESULT, PATCH_ERRORS, PATCH_RESULT);
	delPatchErrors.Format(_T("del %s"), PATCH_ERRORS);

	CString text;
	text.Format(_T("Patch diff to directory %s?\n\nCommand (choose No to copy it into the clipboard):\n%s"), (LPCTSTR)m_DestDir, (LPCTSTR)patchCmdLine);
	int result;
	if ((result = ::MessageBox(m_hWnd, text, _T("Confirmation"), MB_YESNOCANCEL | MB_ICONQUESTION)) == IDYES)
	{
		if ( _chdir( m_DestDir ) == 0 )
		{
			system( patchCmdLine );
			system( concatOutput );
			system( delPatchErrors );
			displayFile( PATCH_RESULT );
			SaveDiff = false;
			m_Display->LineScroll( 0 );

			if ( (m_Display->GetLineCount() == 0) ||
				 (m_Display->GetLineCount() == 1 && m_Display->LineLength(0)<2) )
			{
				CString s;
				s.Format(_T("Nothing was patched.\r\nIf this is not the expected result:\r\n- check if the good patch.exe is in %s\r\n- check if %s exists (generated by previous diff)\r\n- check if C:\\ has enough free space and access rights to write a file."), TEMP_DIFF_FILE);
				displayMessage(s);
			}
			else
			{
				m_Filename = PATCH_RESULT + ":";
				UpdateData( false );
			}
		}
		else
		{
			displayMessage( "Target directory not found" );
		}
	}
	else if ( result == IDNO )
	{
		SendTextToClipboard( patchCmdLine );
	}
}


void CBranch_patcherDlg::OnSize(UINT nType, int cx, int cy) 
{
	CDialog::OnSize(nType, cx, cy);
	
	if ( m_Display )
	{
		RECT cltRect;
		GetClientRect( &cltRect );
		CRect dispRect;
		m_Display->MoveWindow( 20, 180, cltRect.right-40, cltRect.bottom-200, true );
	}
}

void CBranch_patcherDlg::OnClose() 
{
	saveConfiguration();

	CDialog::OnClose();
}


void CBranch_patcherDlg::processCommandLine()
{
	CString cmdLine = theApp.m_lpCmdLine;
	
	if ( ! cmdLine.IsEmpty() )
	{
		setSrcDirectory( cmdLine );
		guessDestDirectory();
	}
}


void CBranch_patcherDlg::guessDestDirectory()
{
	if ( hasTokens() )
	{
		CString dir = m_SrcDir;
		if ( dir.Find( "\\"+Token1+"\\", 0 ) != -1 )
		{
			dir.Replace( "\\"+Token1+"\\", "\\"+Token2+"\\" );
			setDestDirectory( dir );
		}
		else if ( dir.Find( "\\"+Token2+"\\", 0 ) != -1 )
		{
			dir.Replace( "\\"+Token2+"\\", "\\"+Token1+"\\" );
			setDestDirectory( dir );
		}
	}
}


void CBranch_patcherDlg::extractDirTokens()
{
	int beginOfToken1, beginOfToken2, endOfToken1, endOfToken2;
	CString text;
	UpdateData( true );

	// Search backward from the end until a different substring is found
	int c1 = m_SrcDir.GetLength()-1;
	int c2 = m_DestDir.GetLength()-1;
	while ( (c1 >= 0) && (c2 >= 0) && (m_SrcDir[c1] == m_DestDir[c2]) )
	{
		--c1;
		--c2;
	}
	
	// Test if both strings are identical
	if ( (c1 < 0) || (c2 < 0) )
	{
		Token1 = m_SrcDir;
		Token2 = m_DestDir;
		return;
	}
	endOfToken1 = c1+1;
	endOfToken2 = c2+1;

	// Search forward from the beginning until a different substring is found
	c1 = 0;
	c2 = 0;
	while ( (c1 < m_SrcDir.GetLength()) && (c2 < m_DestDir.GetLength()) && (m_SrcDir[c1] == m_DestDir[c2]) )
	{
		++c1;
		++c2;
	}
	if ( (c1 == m_SrcDir.GetLength()) || (c2 == m_DestDir.GetLength()) )
	{
		return; // both strings are identical (should not occur again)
	}

	// If one of the token is empty, expand both downto the closest backslash
	if ( (c1 == endOfToken1) || (c2 == endOfToken2) )
	{
		--c1;
		while ( (c1 >= 0) && (m_SrcDir[c1] != '\\') )
		{
			--c1;
		}
		++c1;
		--c2;
		while ( (c2 >= 0) && (m_DestDir[c2] != '\\') )
		{
			--c2;
		}
		++c2;
	}
	beginOfToken1 = c1;
	beginOfToken2 = c2;

	Token1 = m_SrcDir.Mid( beginOfToken1, endOfToken1-beginOfToken1 );
	Token2 = m_DestDir.Mid( beginOfToken2, endOfToken2-beginOfToken2 );

//endExtract:
	/*if ( hasTokens() )
	{
		text.Format( "The two branch tokens '%s' and '%s' are now stored", Token1, Token2 );
		::MessageBox( m_hWnd, text, "Tokens found", MB_OK | MB_ICONINFORMATION );
		return;
	}*/
//notfound:
	//::MessageBox( m_hWnd, "Tokens not found in the directories", "Extracting tokens", MB_OK | MB_ICONEXCLAMATION );
}


void CBranch_patcherDlg::loadConfiguration()
{
	// Read the dest directory from the registry
	free( (void*)theApp.m_pszRegistryKey );
	theApp.m_pszRegistryKey = _tcsdup( _T("Nevrax") );

	CString savedSrcDir, savedTargetDir, token1, token2;
	if ( m_SrcDir.IsEmpty() )
	{
		savedSrcDir = theApp.GetProfileString( _T(""), _T("SourceDir") );
		if ( ! savedSrcDir.IsEmpty() )
		{
			setSrcDirectory( savedSrcDir );
		}
	}
	savedTargetDir = theApp.GetProfileString( _T(""), _T("TargetDir") );
	if ( ! savedTargetDir.IsEmpty() )
	{
		setDestDirectory( savedTargetDir );
	}
	Token1 = theApp.GetProfileString( _T(""), _T("Token1") );
	Token2 = theApp.GetProfileString( _T(""), _T("Token2") );
	PatchExeDir = theApp.GetProfileString( _T(""), _T("PatchExeDir") );
	CvsDiffDirLevel = theApp.GetProfileInt( _T(""), _T("CvsDiffDirLevel"), 1 ); // 0 for old version of CVS, 1 for new version of CVS
}


void CBranch_patcherDlg::saveConfiguration()
{
	UpdateData( true );
	if ( ! EnteringTokens )
	{
		theApp.WriteProfileString( _T(""), _T("SourceDir"), m_SrcDir );	
		theApp.WriteProfileString( _T(""), _T("TargetDir"), m_DestDir );
	}
	theApp.WriteProfileString( _T(""), _T("Token1"), Token1 );
	theApp.WriteProfileString( _T(""), _T("Token2"), Token2 );
}


void CBranch_patcherDlg::OnButtonExtractTokens() 
{
	if ( ! EnteringTokens )
	{
		EnteringTokens = true;
		extractDirTokens();	
		SrcDirBackup = m_SrcDir;
		TargetDirBackup = m_DestDir;
		m_SrcDir = Token1;
		m_DestDir = Token2;
		m_SrcDirLabel = "Enter Token 1";
		m_TargetDirLabel = "Enter Token 2";
		m_Filename = "The tokens above were extracted from the directories.";
		((CButton*)GetDlgItem( IDC_ButtonExtractTokens ))->SetWindowText( _T("Store Tokens") );
		GetDlgItem( IDC_TopText )->ShowWindow( SW_HIDE );
		GetDlgItem( IDC_ButtonClearTokens )->EnableWindow( FALSE );
		GetDlgItem( IDC_ButtonPatch )->ShowWindow( SW_HIDE );
		GetDlgItem( IDC_ButtonPatch )->EnableWindow( FALSE );
		GetDlgItem( IDC_DoPatch )->ShowWindow( SW_HIDE );
		GetDlgItem( IDC_Group )->ShowWindow( SW_HIDE );
		UpdateData( false );
	}
	else
	{
		UpdateData( true );
		EnteringTokens = false;
		Token1 = m_SrcDir;
		Token2 = m_DestDir;
		m_SrcDirLabel = "Source Dir";
		m_TargetDirLabel = "Target Dir";
		m_SrcDir = SrcDirBackup;
		m_DestDir = TargetDirBackup;
		m_Filename.Empty();
		((CButton*)GetDlgItem( IDC_ButtonExtractTokens ))->SetWindowText( _T("Enter Tokens") );
		GetDlgItem( IDC_TopText )->ShowWindow( SW_SHOW );
		GetDlgItem( IDC_ButtonClearTokens )->EnableWindow( TRUE );
		GetDlgItem( IDC_ButtonPatch )->ShowWindow( SW_SHOW );
		GetDlgItem( IDC_ButtonPatch )->EnableWindow( TRUE );
		GetDlgItem( IDC_DoPatch )->ShowWindow( SW_SHOW );
		GetDlgItem( IDC_Group )->ShowWindow( SW_SHOW );
		displayTokens();
	}
}


void CBranch_patcherDlg::OnButtonClearTokens() 
{
	Token1.Empty();
	Token2.Empty();
	displayTokens();
}


bool CBranch_patcherDlg::hasTokens() const
{
	return ! (Token1.IsEmpty() || Token2.IsEmpty());
}


void CBranch_patcherDlg::displayTokens()
{
	((CButton*)GetDlgItem( IDC_ButtonClearTokens ))->EnableWindow( hasTokens()?TRUE:FALSE );
	if ( hasTokens() )
	{
		m_Tokens = "Tokens: '" + Token1 + "' and '" + Token2 + "'";
	}
	else
	{
		m_Tokens = "No token";
	}
	UpdateData( false );
}