// Modified by:
// Created: 04/01/98
// RCS-ID: $Id$
-// Copyright: (c) Julian Smart and Markus Holzem
-// Licence: wxWindows license
+// Copyright: (c) Julian Smart
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "printwin.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
+#if wxUSE_PRINTING_ARCHITECTURE
+
#ifdef __BORLANDC__
#pragma hdrstop
#endif
-#include "wx/defs.h"
-
#ifndef WX_PRECOMP
#include "wx/utils.h"
#include "wx/dc.h"
#include "wx/msgdlg.h"
#endif
+#include "wx/math.h"
+#include "wx/mac/uma.h"
+
#include "wx/mac/printmac.h"
+#include "wx/mac/private/print.h"
+
#include "wx/dcprint.h"
#include "wx/printdlg.h"
+#include "wx/mac/printdlg.h"
#include <stdlib.h>
-#if !USE_SHARED_LIBRARY
+IMPLEMENT_DYNAMIC_CLASS(wxMacCarbonPrintData, wxPrintNativeDataBase)
IMPLEMENT_DYNAMIC_CLASS(wxMacPrinter, wxPrinterBase)
IMPLEMENT_CLASS(wxMacPrintPreview, wxPrintPreviewBase)
-#endif
-/*
- * Printer
- */
-
-wxMacPrinter::wxMacPrinter(wxPrintDialogData *data):
- wxPrinterBase(data)
+bool wxMacCarbonPrintData::Ok() const
{
+ return (m_macPageFormat != kPMNoPageFormat) && (m_macPrintSettings != kPMNoPrintSettings) && (m_macPrintSession != kPMNoReference);
}
-
-wxMacPrinter::~wxMacPrinter(void)
+wxMacCarbonPrintData::wxMacCarbonPrintData()
{
+ m_macPageFormat = kPMNoPageFormat;
+ m_macPrintSettings = kPMNoPrintSettings;
+ m_macPrintSession = kPMNoReference ;
+ ValidateOrCreate() ;
}
-bool wxMacPrinter::Print(wxWindow *parent, wxPrintout *printout, bool prompt)
+wxMacCarbonPrintData::~wxMacCarbonPrintData()
{
- sm_abortIt = FALSE;
- sm_abortWindow = NULL;
-
- if (!printout)
- return FALSE;
-
- printout->SetIsPreview(FALSE);
- printout->OnPreparePrinting();
-
- // Get some parameters from the printout, if defined
- int fromPage, toPage;
- int minPage, maxPage;
- printout->GetPageInfo(&minPage, &maxPage, &fromPage, &toPage);
-
- if (maxPage == 0)
- return FALSE;
-
- m_printDialogData.SetMinPage(minPage);
- m_printDialogData.SetMaxPage(maxPage);
- if (fromPage != 0)
- m_printDialogData.SetFromPage(fromPage);
- if (toPage != 0)
- m_printDialogData.SetToPage(toPage);
-
- if (minPage != 0)
- {
- m_printDialogData.EnablePageNumbers(TRUE);
- if (m_printDialogData.GetFromPage() < m_printDialogData.GetMinPage())
- m_printDialogData.SetFromPage(m_printDialogData.GetMinPage());
- else if (m_printDialogData.GetFromPage() > m_printDialogData.GetMaxPage())
- m_printDialogData.SetFromPage(m_printDialogData.GetMaxPage());
- if (m_printDialogData.GetToPage() > m_printDialogData.GetMaxPage())
- m_printDialogData.SetToPage(m_printDialogData.GetMaxPage());
- else if (m_printDialogData.GetToPage() < m_printDialogData.GetMinPage())
- m_printDialogData.SetToPage(m_printDialogData.GetMinPage());
- }
- else
- m_printDialogData.EnablePageNumbers(FALSE);
-
- // Create a suitable device context
- wxDC *dc = NULL;
- if (prompt)
- {
- wxPrintDialog dialog(parent, & m_printDialogData);
- if (dialog.ShowModal() == wxID_OK)
- {
- dc = dialog.GetPrintDC();
- m_printDialogData = dialog.GetPrintData();
- }
- }
- else
- {
- dc = new wxPrinterDC( m_printDialogData.GetPrintData() ) ;
- }
-
-
- // May have pressed cancel.
- if (!dc || !dc->Ok())
- {
- if (dc) delete dc;
- return FALSE;
- }
-
- // on the mac we have always pixels as addressing mode with 72 dpi
-
- printout->SetPPIScreen(72, 72);
- printout->SetPPIPrinter(72, 72);
-
- // Set printout parameters
- printout->SetDC(dc);
-
- int w, h;
- wxCoord ww, hh;
- dc->GetSize(&w, &h);
- printout->SetPageSizePixels((int)w, (int)h);
- dc->GetSizeMM(&ww, &hh);
- printout->SetPageSizeMM((int)ww, (int)hh);
-
- // Create an abort window
- wxBeginBusyCursor();
+ if (m_macPageFormat != kPMNoPageFormat)
+ {
+ (void)PMRelease(m_macPageFormat);
+ m_macPageFormat = kPMNoPageFormat;
+ }
-/*
- wxWindow *win = CreateAbortWindow(parent, printout);
- wxYield();
+ if (m_macPrintSettings != kPMNoPrintSettings)
+ {
+ (void)PMRelease(m_macPrintSettings);
+ m_macPrintSettings = kPMNoPrintSettings;
+ }
+
+ if ( m_macPrintSession != kPMNoReference )
+ {
+ (void)PMRelease(m_macPrintSession);
+ m_macPrintSession = kPMNoReference;
+ }
+}
- if (!win)
- {
- wxEndBusyCursor();
- wxMessageBox("Sorry, could not create an abort dialog.", "Print Error", wxOK, parent);
- delete dc;
- }
- sm_abortWindow = win;
- sm_abortWindow->Show(TRUE);
- wxYield();
-*/
+void wxMacCarbonPrintData::ValidateOrCreate()
+{
+ OSStatus err = noErr ;
+ if ( m_macPrintSession == kPMNoReference )
+ {
+ err = PMCreateSession( (PMPrintSession *) &m_macPrintSession ) ;
+ }
+ // Set up a valid PageFormat object.
+ if ( m_macPageFormat == kPMNoPageFormat)
+ {
+ err = PMCreatePageFormat((PMPageFormat *) &m_macPageFormat);
+
+ // Note that PMPageFormat is not session-specific, but calling
+ // PMSessionDefaultPageFormat assigns values specific to the printer
+ // associated with the current printing session.
+ if ((err == noErr) &&
+ ( m_macPageFormat != kPMNoPageFormat))
+ {
+ err = PMSessionDefaultPageFormat((PMPrintSession) m_macPrintSession,
+ (PMPageFormat) m_macPageFormat);
+ }
+ }
+ else
+ {
+ err = PMSessionValidatePageFormat((PMPrintSession) m_macPrintSession,
+ (PMPageFormat) m_macPageFormat,
+ kPMDontWantBoolean);
+ }
+
+ // Set up a valid PrintSettings object.
+ if ( m_macPrintSettings == kPMNoPrintSettings)
+ {
+ err = PMCreatePrintSettings((PMPrintSettings *) &m_macPrintSettings);
+
+ // Note that PMPrintSettings is not session-specific, but calling
+ // PMSessionDefaultPrintSettings assigns values specific to the printer
+ // associated with the current printing session.
+ if ((err == noErr) &&
+ ( m_macPrintSettings != kPMNoPrintSettings))
+ {
+ err = PMSessionDefaultPrintSettings((PMPrintSession) m_macPrintSession,
+ (PMPrintSettings) m_macPrintSettings);
+ }
+ }
+ else
+ {
+ err = PMSessionValidatePrintSettings((PMPrintSession) m_macPrintSession,
+ (PMPrintSettings) m_macPrintSettings,
+ kPMDontWantBoolean);
+ }
+}
- printout->OnBeginPrinting();
-
- bool keepGoing = TRUE;
+bool wxMacCarbonPrintData::TransferFrom( const wxPrintData &data )
+{
+ ValidateOrCreate() ;
+ PMSetCopies( (PMPrintSettings) m_macPrintSettings , data.GetNoCopies() , false ) ;
+ PMSetOrientation( (PMPageFormat) m_macPageFormat , ( data.GetOrientation() == wxLANDSCAPE ) ?
+ kPMLandscape : kPMPortrait , false ) ;
+ // collate cannot be set
+#if 0 // not yet tested
+ if ( m_printerName.Length() > 0 )
+ PMSessionSetCurrentPrinter( (PMPrintSession) m_macPrintSession , wxMacCFStringHolder( m_printerName , wxFont::GetDefaultEncoding() ) ) ;
+#endif
+ PMColorMode color ;
+ PMGetColorMode( (PMPrintSettings) m_macPrintSettings, &color ) ;
+ if ( data.GetColour() )
+ {
+ if ( color == kPMBlackAndWhite )
+ PMSetColorMode( (PMPrintSettings) m_macPrintSettings, kPMColor ) ;
+ }
+ else
+ PMSetColorMode( (PMPrintSettings) m_macPrintSettings, kPMBlackAndWhite ) ;
+
+ // PMDuplexMode not yet accessible via API
+ // PMQualityMode not yet accessible via API
+ // todo paperSize
+ return true ;
+}
- int copyCount;
- for (copyCount = 1; copyCount <= m_printDialogData.GetNoCopies(); copyCount ++)
- {
- if (!printout->OnBeginDocument(m_printDialogData.GetFromPage(), m_printDialogData.GetToPage()))
+bool wxMacCarbonPrintData::TransferTo( wxPrintData &data )
+{
+ OSStatus err = noErr ;
+
+ UInt32 copies ;
+ err = PMGetCopies( m_macPrintSettings , &copies ) ;
+ if ( err == noErr )
+ data.SetNoCopies( copies ) ;
+
+ PMOrientation orientation ;
+ err = PMGetOrientation( m_macPageFormat , &orientation ) ;
+ if ( err == noErr )
{
- wxEndBusyCursor();
- wxMessageBox("Could not start printing.", "Print Error", wxOK, parent);
- break;
+ if ( orientation == kPMPortrait || orientation == kPMReversePortrait )
+ data.SetOrientation( wxPORTRAIT );
+ else
+ data.SetOrientation( wxLANDSCAPE );
}
- if (sm_abortIt)
- break;
- int pn;
- for (pn = m_printDialogData.GetFromPage(); keepGoing && (pn <= m_printDialogData.GetToPage()) && printout->HasPage(pn);
- pn++)
+ // collate cannot be set
+#if 0
{
- if (sm_abortIt)
- {
- keepGoing = FALSE;
- break;
- }
- else
- {
- dc->StartPage();
- keepGoing = printout->OnPrintPage(pn);
- dc->EndPage();
- }
+ wxMacCFStringHolder name ;
+ PMPrinter printer ;
+ PMSessionGetCurrentPrinter( m_macPrintSession ,
+ &printer ) ;
+ m_printerName = name.AsString() ;
}
- printout->OnEndDocument();
- }
+#endif
+
+ PMColorMode color ;
+ err = PMGetColorMode( m_macPrintSettings, &color ) ;
+ if ( err == noErr )
+ data.SetColour( !(color == kPMBlackAndWhite) ) ;
+
+ // PMDuplexMode not yet accessible via API
+ // PMQualityMode not yet accessible via API
+ // todo paperSize
+ PMRect rPaper;
+ err = PMGetUnadjustedPaperRect( m_macPageFormat, &rPaper);
+ if ( err == noErr )
+ {
+ data.SetPaperSize( wxSize (
+ (int)(( rPaper.right - rPaper.left ) * pt2mm + 0.5 ) ,
+ (int)(( rPaper.bottom - rPaper.top ) * pt2mm + 0.5 ) ) );
+ }
+ return true ;
+}
- printout->OnEndPrinting();
+void wxMacCarbonPrintData::TransferFrom( wxPageSetupData *data )
+{
+ // should we setup the page rect here ?
+ // since MacOS sometimes has two same paper rects with different
+ // page rects we could make it roundtrip safe perhaps
+}
- if (sm_abortWindow)
- {
- sm_abortWindow->Show(FALSE);
- delete sm_abortWindow;
- sm_abortWindow = NULL;
- }
+void wxMacCarbonPrintData::TransferTo( wxPageSetupData* data )
+{
+ PMRect rPaper;
+ OSStatus err = PMGetUnadjustedPaperRect(m_macPageFormat, &rPaper);
+ if ( err == noErr )
+ {
+ PMRect rPage ;
+ err = PMGetUnadjustedPageRect(m_macPageFormat , &rPage ) ;
+ if ( err == noErr )
+ {
+ data->SetMinMarginTopLeft( wxPoint (
+ (int)(((double) rPage.left - rPaper.left ) * pt2mm) ,
+ (int)(((double) rPage.top - rPaper.top ) * pt2mm) ) ) ;
+
+ data->SetMinMarginBottomRight( wxPoint (
+ (wxCoord)(((double) rPaper.right - rPage.right ) * pt2mm),
+ (wxCoord)(((double) rPaper.bottom - rPage.bottom ) * pt2mm)) ) ;
+
+ if ( data->GetMarginTopLeft().x < data->GetMinMarginTopLeft().x )
+ data->SetMarginTopLeft( wxPoint( data->GetMinMarginTopLeft().x ,
+ data->GetMarginTopLeft().y ) ) ;
+
+ if ( data->GetMarginBottomRight().x < data->GetMinMarginBottomRight().x )
+ data->SetMarginBottomRight( wxPoint( data->GetMinMarginBottomRight().x ,
+ data->GetMarginBottomRight().y ) );
+
+ if ( data->GetMarginTopLeft().y < data->GetMinMarginTopLeft().y )
+ data->SetMarginTopLeft( wxPoint( data->GetMarginTopLeft().x , data->GetMinMarginTopLeft().y ) );
+
+ if ( data->GetMarginBottomRight().y < data->GetMinMarginBottomRight().y )
+ data->SetMarginBottomRight( wxPoint( data->GetMarginBottomRight().x ,
+ data->GetMinMarginBottomRight().y) );
+
+ }
+ }
+}
+
+void wxMacCarbonPrintData::TransferTo( wxPrintDialogData* data )
+{
+ UInt32 minPage , maxPage ;
+ PMGetPageRange( m_macPrintSettings , &minPage , &maxPage ) ;
+ data->SetMinPage( minPage ) ;
+ data->SetMaxPage( maxPage ) ;
+ UInt32 copies ;
+ PMGetCopies( m_macPrintSettings , &copies ) ;
+ data->SetNoCopies( copies ) ;
+ UInt32 from , to ;
+ PMGetFirstPage( m_macPrintSettings , &from ) ;
+ PMGetLastPage( m_macPrintSettings , &to ) ;
+ data->SetFromPage( from ) ;
+ data->SetToPage( to ) ;
+}
+
+void wxMacCarbonPrintData::TransferFrom( wxPrintDialogData* data )
+{
+ PMSetPageRange( m_macPrintSettings , data->GetMinPage() , data->GetMaxPage() ) ;
+ PMSetCopies( m_macPrintSettings , data->GetNoCopies() , false ) ;
+ PMSetFirstPage( m_macPrintSettings , data->GetFromPage() , false ) ;
+
+ int toPage = data->GetToPage();
+ if (toPage < 1)
+ toPage = data->GetFromPage();
+ PMSetLastPage( m_macPrintSettings , toPage , false ) ;
+}
- wxEndBusyCursor();
+/*
+* Printer
+*/
- delete dc;
-
- return TRUE;
+wxMacPrinter::wxMacPrinter(wxPrintDialogData *data):
+wxPrinterBase(data)
+{
+}
+
+wxMacPrinter::~wxMacPrinter(void)
+{
+}
+
+bool wxMacPrinter::Print(wxWindow *parent, wxPrintout *printout, bool prompt)
+{
+ sm_abortIt = FALSE;
+ sm_abortWindow = NULL;
+
+ if (!printout)
+ return FALSE;
+
+ printout->SetIsPreview(FALSE);
+ if (m_printDialogData.GetMinPage() < 1)
+ m_printDialogData.SetMinPage(1);
+ if (m_printDialogData.GetMaxPage() < 1)
+ m_printDialogData.SetMaxPage(9999);
+
+ // Create a suitable device context
+ wxDC *dc = NULL;
+ if (prompt)
+ {
+ wxPrintDialog dialog(parent, & m_printDialogData);
+ if (dialog.ShowModal() == wxID_OK)
+ {
+ dc = dialog.GetPrintDC();
+ m_printDialogData = dialog.GetPrintDialogData();
+ }
+ }
+ else
+ {
+ dc = new wxPrinterDC( m_printDialogData.GetPrintData() ) ;
+ }
+
+
+ // May have pressed cancel.
+ if (!dc || !dc->Ok())
+ {
+ if (dc) delete dc;
+ return FALSE;
+ }
+
+ // on the mac we have always pixels as addressing mode with 72 dpi
+
+ printout->SetPPIScreen(72, 72);
+ printout->SetPPIPrinter(72, 72);
+
+ // Set printout parameters
+ printout->SetDC(dc);
+
+ int w, h;
+ wxCoord ww, hh;
+ dc->GetSize(&w, &h);
+ printout->SetPageSizePixels((int)w, (int)h);
+ dc->GetSizeMM(&ww, &hh);
+ printout->SetPageSizeMM((int)ww, (int)hh);
+
+ // Create an abort window
+ wxBeginBusyCursor();
+
+ printout->OnPreparePrinting();
+
+ // Get some parameters from the printout, if defined
+ int fromPage, toPage;
+ int minPage, maxPage;
+ printout->GetPageInfo(&minPage, &maxPage, &fromPage, &toPage);
+
+ if (maxPage == 0)
+ {
+ wxEndBusyCursor();
+ return FALSE;
+ }
+
+ // Only set min and max, because from and to have been
+ // set by the user
+ m_printDialogData.SetMinPage(minPage);
+ m_printDialogData.SetMaxPage(maxPage);
+
+ wxWindow *win = CreateAbortWindow(parent, printout);
+ wxSafeYield(win,true);
+
+ if (!win)
+ {
+ wxEndBusyCursor();
+ wxMessageBox(wxT("Sorry, could not create an abort dialog."), wxT("Print Error"), wxOK, parent);
+ delete dc;
+ return FALSE;
+ }
+ sm_abortWindow = win;
+ sm_abortWindow->Show(TRUE);
+ wxSafeYield(win,true);
+
+ printout->OnBeginPrinting();
+
+ bool keepGoing = TRUE;
+
+ int copyCount;
+ for (copyCount = 1; copyCount <= m_printDialogData.GetNoCopies(); copyCount ++)
+ {
+ if (!printout->OnBeginDocument(m_printDialogData.GetFromPage(), m_printDialogData.GetToPage()))
+ {
+ wxEndBusyCursor();
+ wxMessageBox(wxT("Could not start printing."), wxT("Print Error"), wxOK, parent);
+ break;
+ }
+ if (sm_abortIt)
+ break;
+
+ int pn;
+ for (pn = m_printDialogData.GetFromPage(); keepGoing && (pn <= m_printDialogData.GetToPage()) && printout->HasPage(pn);
+ pn++)
+ {
+ if (sm_abortIt)
+ {
+ keepGoing = FALSE;
+ break;
+ }
+ else
+ {
+#if TARGET_CARBON
+ if ( UMAGetSystemVersion() >= 0x1000 )
+#endif
+ {
+ GrafPtr thePort ;
+ GetPort( &thePort ) ;
+ wxSafeYield(win,true);
+ SetPort( thePort ) ;
+ }
+ dc->StartPage();
+ keepGoing = printout->OnPrintPage(pn);
+ dc->EndPage();
+ }
+ }
+ printout->OnEndDocument();
+ }
+
+ printout->OnEndPrinting();
+
+ if (sm_abortWindow)
+ {
+ sm_abortWindow->Show(FALSE);
+ delete sm_abortWindow;
+ sm_abortWindow = NULL;
+ }
+
+ wxEndBusyCursor();
+
+ delete dc;
+
+ return TRUE;
}
wxDC* wxMacPrinter::PrintDialog(wxWindow *parent)
{
wxDC* dc = (wxDC*) NULL;
-
+
wxPrintDialog dialog(parent, & m_printDialogData);
int ret = dialog.ShowModal();
-
+
if (ret == wxID_OK)
{
dc = dialog.GetPrintDC();
m_printDialogData = dialog.GetPrintDialogData();
}
-
+
return dc;
}
bool wxMacPrinter::Setup(wxWindow *parent)
{
+#if 0
wxPrintDialog dialog(parent, & m_printDialogData);
dialog.GetPrintDialogData().SetSetupDialog(TRUE);
-
+
int ret = dialog.ShowModal();
-
+
if (ret == wxID_OK)
{
m_printDialogData = dialog.GetPrintDialogData();
}
-
+
return (ret == wxID_OK);
+#endif
+ return wxID_CANCEL;
}
/*
- * Print preview
- */
+* Print preview
+*/
wxMacPrintPreview::wxMacPrintPreview(wxPrintout *printout,
- wxPrintout *printoutForPrinting,
- wxPrintDialogData *data)
- : wxPrintPreviewBase(printout, printoutForPrinting, data)
+ wxPrintout *printoutForPrinting,
+ wxPrintDialogData *data)
+ : wxPrintPreviewBase(printout, printoutForPrinting, data)
{
DetermineScaling();
}
wxMacPrintPreview::wxMacPrintPreview(wxPrintout *printout, wxPrintout *printoutForPrinting, wxPrintData *data):
- wxPrintPreviewBase(printout, printoutForPrinting, data)
+wxPrintPreviewBase(printout, printoutForPrinting, data)
{
- DetermineScaling();
+ DetermineScaling();
}
wxMacPrintPreview::~wxMacPrintPreview(void)
bool wxMacPrintPreview::Print(bool interactive)
{
- if (!m_printPrintout)
- return FALSE;
- wxMacPrinter printer(&m_printDialogData);
- return printer.Print(m_previewFrame, m_printPrintout, interactive);
+ if (!m_printPrintout)
+ return FALSE;
+ wxMacPrinter printer(&m_printDialogData);
+ return printer.Print(m_previewFrame, m_printPrintout, interactive);
}
void wxMacPrintPreview::DetermineScaling(void)
{
- int screenWidth , screenHeight ;
- wxDisplaySize( &screenWidth , &screenHeight ) ;
-
- m_previewPrintout->SetPPIScreen( 72 , 72 ) ;
- m_previewPrintout->SetPPIPrinter( 72 , 72 ) ;
- m_previewPrintout->SetPageSizeMM( 8 * 25.6 , 11 * 25.6 ) ;
- m_previewPrintout->SetPageSizePixels( 8 * 72 , 11 * 72 ) ;
+ int screenWidth , screenHeight ;
+ wxDisplaySize( &screenWidth , &screenHeight ) ;
+
+ m_previewPrintout->SetPPIScreen( 72 , 72 ) ;
+ m_previewPrintout->SetPPIPrinter( 72 , 72 ) ;
+ m_previewPrintout->SetPageSizeMM( (int) (8.0 * 25.6), (int) (11.0 * 25.6) );
+ m_previewPrintout->SetPageSizePixels( 8 * 72 , 11 * 72 ) ;
m_pageWidth = 8 * 72 ;
m_pageHeight = 11 * 72 ;
m_previewScale = 1 ;
-
+
// Get a device context for the currently selected printer
wxPrinterDC printerDC(m_printDialogData.GetPrintData());
if (printerDC.Ok())
{
- int x , y ;
- wxCoord ww, hh;
- printerDC.GetSizeMM(&ww, &hh);
- printerDC.GetSize( &x , &y ) ;
- m_previewPrintout->SetPageSizeMM((int)ww, (int)hh);
- m_previewPrintout->SetPageSizePixels( x , y) ;
- m_pageWidth = x ;
- m_pageHeight = y ;
- m_isOk = true ;
-
- }
+ int x , y ;
+ wxCoord ww, hh;
+ printerDC.GetSizeMM(&ww, &hh);
+ printerDC.GetSize( &x , &y ) ;
+ m_previewPrintout->SetPageSizeMM((int)ww, (int)hh);
+ m_previewPrintout->SetPageSizePixels( x , y) ;
+ m_pageWidth = x ;
+ m_pageHeight = y ;
+ m_isOk = true ;
+ }
+ else
+ {
+ m_isOk = false ;
+ }
// At 100%, the page should look about page-size on the screen.
// m_previewScale = (float)((float)screenWidth/(float)printerWidth);
// m_previewScale = m_previewScale * (float)((float)screenXRes/(float)printerXRes);
m_previewScale = 1 ;
}
+
+#endif
projects / wxWidgets.git / blobdiff