/////////////////////////////////////////////////////////////////////////////
// Name: filedlg.cpp
-// Purpose: wxFileDialog
+// Purpose: wxFileDialog
// Author: AUTHOR
// Modified by:
// Created: ??/??/98
#endif
#include "wx/defs.h"
+#include "wx/app.h"
#include "wx/utils.h"
#include "wx/dialog.h"
#include "wx/filedlg.h"
#include "wx/intl.h"
+#ifndef __DARWIN__
+ #include "PLStringFuncs.h"
+#endif
+
#if !USE_SHARED_LIBRARY
IMPLEMENT_CLASS(wxFileDialog, wxDialog)
#endif
-WXDLLEXPORT wxString wxFileSelector(const char *title,
+// begin wxmac
+
+#ifndef __DARWIN__
+ #include <Navigation.h>
+#endif
+
+#ifndef __DARWIN__
+ #include "morefile.h"
+ #include "moreextr.h"
+ #include "fullpath.h"
+ #include "fspcompa.h"
+ #include "PLStringFuncs.h"
+#endif
+
+extern bool gUseNavServices ;
+
+// the data we need to pass to our standard file hook routine
+// includes a pointer to the dialog, a pointer to the standard
+// file reply record (so we can inspect the current selection)
+// and a copy of the "previous" file spec of the reply record
+// so we can see if the selection has changed
+
+const int kwxMacFileTypes = 10 ;
+
+struct OpenUserDataRec {
+ int currentfilter ;
+ wxString name [kwxMacFileTypes] ;
+ wxString extensions[kwxMacFileTypes] ;
+ OSType filtermactypes[kwxMacFileTypes] ;
+ int numfilters ;
+};
+typedef struct OpenUserDataRec
+ OpenUserDataRec, *OpenUserDataRecPtr;
+
+static pascal void NavEventProc(
+ NavEventCallbackMessage inSelector,
+ NavCBRecPtr ioParams,
+ NavCallBackUserData ioUserData);
+
+#if TARGET_CARBON
+ static NavEventUPP sStandardNavEventFilter = NewNavEventUPP(NavEventProc);
+#else
+ static NavEventUPP sStandardNavEventFilter = NewNavEventProc(NavEventProc);
+#endif
+
+static pascal void
+NavEventProc(
+ NavEventCallbackMessage inSelector,
+ NavCBRecPtr ioParams,
+ NavCallBackUserData ioUserData )
+{
+ OpenUserDataRec * data = ( OpenUserDataRec *) ioUserData ;
+ if (inSelector == kNavCBEvent) {
+ // In Universal Headers 3.2, Apple changed the definition of
+ /*
+ #if UNIVERSAL_INTERFACES_VERSION >= 0x0320 // Universal Headers 3.2
+ UModalAlerts::ProcessModalEvent(*(ioParams->eventData.eventDataParms.event));
+
+ #else
+ UModalAlerts::ProcessModalEvent(*(ioParams->eventData.event));
+ #endif
+ */
+
+ wxTheApp->MacHandleOneEvent(ioParams->eventData.eventDataParms.event);
+ } else if ( inSelector == kNavCBPopupMenuSelect )
+ {
+ NavMenuItemSpec * menu = (NavMenuItemSpec *) ioParams->eventData.eventDataParms.param ;
+ data->currentfilter = menu->menuType ;
+ }
+}
+
+char * gfilters[] =
+{
+ "*.TXT" ,
+ "*.TIF" ,
+ "*.JPG" ,
+
+ NULL
+} ;
+
+OSType gfiltersmac[] =
+{
+ 'TEXT' ,
+ 'TIFF' ,
+ 'JPEG' ,
+
+ '****'
+} ;
+
+
+#if !TARGET_CARBON
+
+static void wxMacSetupStandardFile(short newVRefNum, long newDirID)
+{
+ enum
+ { SFSaveDisk = 0x214, CurDirStore = 0x398 };
+ *(short *) SFSaveDisk = -1 * newVRefNum;
+ *(long *) CurDirStore = newDirID;
+}
+
+static void wxMacSetupStandardFileFromPath( const char* s )
+{
+ Str255 volume ;
+ Str255 path ;
+ short vRefNum ;
+ long dirRef ;
+ short i,j ;
+ Boolean isDirectory ;
+
+ for (i=0 ; (s[i]!=0) && (s[i]!=':') ;i++)
+ {
+ volume[i]=s[i] ;
+ }
+ volume[i]=':' ;
+ volume[i+1]=0 ;
+
+ // then copy the rest of the filename
+
+ for (j=0;(s[i]!=0);i++,j++)
+ {
+ path[j]=s[i] ;
+ }
+ path[j]=0 ;
+
+ c2pstr((Ptr) volume) ;
+ c2pstr((Ptr) path) ;
+
+ SetVol(volume, 0) ;
+ GetVol( NULL, &vRefNum ) ;
+
+ GetDirectoryID( vRefNum , fsRtDirID , path , &dirRef , &isDirectory ) ;
+ wxMacSetupStandardFile(vRefNum, dirRef) ;
+}
+
+enum {
+ kSelectItem = 10, // select button item number
+ kSFGetFileDlgID = 251, // dialog resource number
+ kStrListID = 251, // our strings
+ kSelectStrNum = 1, // word 'Select: ' for button
+ kDesktopStrNum = 2, // word 'Desktop' for button
+ kSelectNoQuoteStrNum = 3, // word 'Select: ' for button
+
+ kUseQuotes = true, // parameter for SetButtonName
+ kDontUseQuotes = false
+};
+
+static void GetLabelString(StringPtr theStr, short stringNum)
+{
+ GetIndString(theStr, kStrListID, stringNum);
+}
+
+static void CopyPStr(StringPtr src, StringPtr dest)
+{
+ BlockMoveData(src, dest, 1 + src[0]);
+}
+
+static char GetSelectKey(void)
+{
+ // this is the key used to trigger the select button
+
+ // NOT INTERNATIONAL SAVVY; should at least grab it from resources
+
+ return 's';
+}
+
+// FlashButton briefly highlights the dialog button
+// as feedback for key equivalents
+
+static void FlashButton(DialogPtr theDlgPtr, short buttonID)
+{
+ short buttonType;
+ Handle buttonHandle;
+ Rect buttonRect;
+ unsigned long finalTicks;
+
+ GetDialogItem(theDlgPtr, buttonID, &buttonType, &buttonHandle, &buttonRect);
+ HiliteControl((ControlHandle) buttonHandle, kControlButtonPart);
+ Delay(10, &finalTicks);
+ HiliteControl((ControlHandle) buttonHandle, 0);
+}
+
+static Boolean SameFSSpec(FSSpecPtr spec1, FSSpecPtr spec2)
+{
+ return (spec1->vRefNum == spec2->vRefNum
+ && spec1->parID == spec2->parID
+ && EqualString(spec1->name, spec2->name, false, false));
+}
+// MyModalDialogFilter maps a key to the Select button, and handles
+// flashing of the button when the key is hit
+
+static pascal Boolean SFGetFolderModalDialogFilter(DialogPtr theDlgPtr, EventRecord *eventRec,
+ short *item, void *dataPtr)
+{
+#pragma unused (dataPtr)
+
+ // make certain the proper dialog is showing, 'cause standard file
+ // can nest dialogs but calls the same filter for each
+
+ if (((WindowPeek) theDlgPtr)->refCon == sfMainDialogRefCon)
+ {
+ // check if the select button was hit
+ /*
+ if ((eventRec->what == keyDown)
+ && (eventRec->modifiers & cmdKey)
+ && ((eventRec->message & charCodeMask) == GetSelectKey()))
+ {
+ *item = kSelectItem;
+ FlashButton(theDlgPtr, kSelectItem);
+ return true;
+ }
+ */
+ }
+
+ return false;
+}
+#endif !TARGET_CARBON
+
+void MakeUserDataRec(OpenUserDataRec *myData , const wxString& filter )
+{
+ myData->currentfilter = 0 ;
+
+ if ( filter && filter[0] )
+ {
+ wxString filter2(filter) ;
+ int filterIndex = 0;
+ bool isName = true ;
+ wxString current ;
+ for( unsigned int i = 0; i < filter2.Len(); i++ )
+ {
+ if( filter2.GetChar(i) == wxT('|') )
+ {
+ if( isName ) {
+ myData->name[filterIndex] = current ;
+ }
+ else {
+ myData->extensions[filterIndex] = current.MakeUpper() ;
+ ++filterIndex ;
+ }
+ isName = !isName ;
+ current = "" ;
+ }
+ else
+ {
+ current += filter2.GetChar(i) ;
+ }
+ }
+ if ( filterIndex > 0 )
+ {
+ wxASSERT_MSG( !isName , "incorrect format of format string" ) ;
+ myData->extensions[filterIndex] = current.MakeUpper() ;
+ ++filterIndex ;
+ }
+
+ myData->numfilters = filterIndex ;
+ for ( int i = 0 ; i < myData->numfilters ; i++ )
+ {
+ int j ;
+ for ( j = 0 ; gfilters[j] ; j++ )
+ {
+ if ( strcmp( myData->extensions[i] , gfilters[j] ) == 0 )
+ {
+ myData->filtermactypes[i] = gfiltersmac[j] ;
+ break ;
+ }
+ }
+ if( gfilters[j] == NULL )
+ {
+ myData->filtermactypes[i] = '****' ;
+ }
+ }
+ }
+ else
+ {
+ myData->numfilters = 0 ;
+ }
+
+}
+void ExtendedOpenFile( ConstStr255Param message , ConstStr255Param path , const char *filter , FileFilterYDUPP fileFilter, StandardFileReply *theSFR )
+{
+ Point thePt;
+ OpenUserDataRec myData;
+ FSSpec tempSpec;
+ Boolean folderFlag;
+ Boolean wasAliasedFlag;
+ DlgHookYDUPP dlgHookUPP;
+ ModalFilterYDUPP myModalFilterUPP;
+ OSErr err;
+ SFTypeList types ;
+
+
+ // presumably we're running System 7 or later so CustomGetFile is
+ // available
+
+ // set initial contents of Select button to a space
+
+ memcpy( theSFR->sfFile.name , "\p " , 2 ) ;
+
+ // point the user data parameter at the reply record so we can get to it later
+
+ MakeUserDataRec( &myData , filter ) ;
+ // display the dialog
+
+#if !TARGET_CARBON
+
+ dlgHookUPP = NULL ;
+// dlgHookUPP = NewDlgHookYDProc(SFGetFolderDialogHook);
+ myModalFilterUPP = NewModalFilterYDProc(SFGetFolderModalDialogFilter);
+
+ thePt.h = thePt.v = -1; // center dialog
+
+ ParamText( message , NULL , NULL , NULL ) ;
+
+ CustomGetFile( fileFilter,
+ -1, // show all types
+ NULL,
+ theSFR,
+ kSFGetFileDlgID,
+ thePt, // top left point
+ dlgHookUPP,
+ myModalFilterUPP,
+ nil, // activate list
+ nil, // activate proc
+ &myData);
+
+ DisposeRoutineDescriptor(dlgHookUPP);
+ DisposeRoutineDescriptor(myModalFilterUPP);
+#else
+#endif
+ // if cancel wasn't pressed and no fatal error occurred...
+
+ if (theSFR->sfGood)
+ {
+ // if no name is in the reply record file spec,
+ // use the file spec of the parent folder
+
+ if (theSFR->sfFile.name[0] == '\0')
+ {
+ err = FSMakeFSSpec(theSFR->sfFile.vRefNum, theSFR->sfFile.parID,
+ "\p", &tempSpec);
+ if (err == noErr)
+ {
+ theSFR->sfFile = tempSpec;
+ }
+ else
+ {
+ // no name to return, forget it
+
+ theSFR->sfGood = false;
+ }
+ }
+
+ // if there is now a name in the file spec, check if it's
+ // for a folder or a volume
+
+ if (theSFR->sfFile.name[0] != '\0')
+ {
+ // the parID of the root of a disk is always fsRtParID == 1
+
+ if (theSFR->sfFile.parID == fsRtParID)
+ {
+ theSFR->sfIsVolume = true;
+ theSFR->sfIsFolder = false; // it would be reasonable for this to be true, too
+ }
+
+ // we have a valid FSSpec, now let's make sure it's not for an alias file
+
+ err = ResolveAliasFile(&theSFR->sfFile, true, &folderFlag, &wasAliasedFlag);
+ if (err != noErr)
+ {
+ theSFR->sfGood = false;
+ }
+
+ // did the alias resolve to a folder?
+
+ if (folderFlag && ! theSFR->sfIsVolume)
+ {
+ theSFR->sfIsFolder = true;
+ }
+ }
+ }
+}
+
+static Boolean CheckFile( ConstStr255Param name , OSType type , OpenUserDataRecPtr data)
+{
+ Str255 filename ;
+ PLstrcpy( filename , name ) ;
+ p2cstr( filename ) ;
+ wxString file(filename) ;
+ file.MakeUpper() ;
+
+ if ( data->numfilters > 0 )
+ {
+ //for ( int i = 0 ; i < data->numfilters ; ++i )
+ int i = data->currentfilter ;
+ if ( data->extensions[i].Right(2) == ".*" )
+ return true ;
+
+ {
+ if ( type == data->filtermactypes[i] )
+ return true ;
+
+ wxString extension = data->extensions[i] ;
+ if ( extension.GetChar(0) == '*' )
+ extension = extension.Mid(1) ;
+
+ if ( file.Len() >= extension.Len() && extension == file.Right(extension.Len() ) )
+ return true ;
+ }
+ return false ;
+ }
+ return true ;
+}
+
+static pascal Boolean CrossPlatformFileFilter(CInfoPBPtr myCInfoPBPtr, void *dataPtr)
+{
+ OpenUserDataRecPtr data = (OpenUserDataRecPtr) dataPtr ;
+ // return true if this item is invisible or a file
+
+ Boolean visibleFlag;
+ Boolean folderFlag;
+
+ visibleFlag = ! (myCInfoPBPtr->hFileInfo.ioFlFndrInfo.fdFlags & kIsInvisible);
+ folderFlag = (myCInfoPBPtr->hFileInfo.ioFlAttrib & 0x10);
+
+ // because the semantics of the filter proc are "true means don't show
+ // it" we need to invert the result that we return
+
+ if ( !visibleFlag )
+ return true ;
+
+ if ( !folderFlag )
+ {
+ return !CheckFile( myCInfoPBPtr->hFileInfo.ioNamePtr , myCInfoPBPtr->hFileInfo.ioFlFndrInfo.fdType , data ) ;
+ }
+
+ return false ;
+}
+
+// end wxmac
+
+wxString wxFileSelector(const char *title,
const char *defaultDir, const char *defaultFileName,
const char *defaultExtension, const char *filter, int flags,
wxWindow *parent, int x, int y)
return wxBuffer;
}
else
- return NULL;
+ return wxGetEmptyString();
}
WXDLLEXPORT wxString wxFileSelectorEx(const char *title,
return wxBuffer;
}
else
- return NULL;
+ return wxGetEmptyString();
}
wxFileDialog::wxFileDialog(wxWindow *parent, const wxString& message,
m_filterIndex = 1;
}
+
+pascal Boolean CrossPlatformFilterCallback (
+ AEDesc *theItem,
+ void *info,
+ void *callBackUD,
+ NavFilterModes filterMode
+)
+{
+ bool display = true;
+ OpenUserDataRecPtr data = (OpenUserDataRecPtr) callBackUD ;
+
+ if (filterMode == kNavFilteringBrowserList)
+ {
+ NavFileOrFolderInfo* theInfo = (NavFileOrFolderInfo*) info ;
+ if (theItem->descriptorType == typeFSS && !theInfo->isFolder)
+ {
+ FSSpec spec;
+#if TARGET_CARBON
+ ::AEGetDescData(theItem, &spec, sizeof(FSSpec) ) ;
+#else
+ memcpy( &spec , (*theItem->dataHandle) , sizeof(FSSpec) ) ;
+#endif
+ display = CheckFile( spec.name , theInfo->fileAndFolder.fileInfo.finderInfo.fdType , data ) ;
+ }
+ }
+
+ return display;
+}
+
int wxFileDialog::ShowModal()
{
- // TODO
+ #if !TARGET_CARBON
+ if ( !gUseNavServices )
+ {
+ if ( m_dialogStyle & wxSAVE )
+ {
+ StandardFileReply reply ;
+ Str255 prompt ;
+ Str255 filename ;
+
+#if TARGET_CARBON
+ c2pstrcpy((StringPtr)prompt, m_message) ;
+#else
+ strcpy((char *)prompt, m_message) ;
+ c2pstr((char *)prompt ) ;
+#endif
+#if TARGET_CARBON
+ c2pstrcpy((StringPtr)filename, m_fileName) ;
+#else
+ strcpy((char *)filename, m_fileName) ;
+ c2pstr((char *)filename ) ;
+#endif
+
+ #if !TARGET_CARBON
+
+ StandardPutFile( prompt , filename , &reply ) ;
+
+ #else
+ #endif
+ if ( reply.sfGood == false )
+ {
+ m_path = "" ;
+ return wxID_CANCEL ;
+ }
+ else
+ {
+ m_path = wxMacFSSpec2MacFilename( &reply.sfFile ) ;
+ return wxID_OK ;
+ }
+ }
+ else
+ {
+ OSType types = '????' ;
+ Str255 prompt ;
+ Str255 path ;
+
+#if TARGET_CARBON
+ c2pstrcpy((StringPtr)prompt, m_message) ;
+#else
+ strcpy((char *)prompt, m_message) ;
+ c2pstr((char *)prompt ) ;
+#endif
+#if TARGET_CARBON
+ c2pstrcpy((StringPtr)path, m_dir ) ;
+#else
+ strcpy((char *)path, m_dir ) ;
+ c2pstr((char *)path ) ;
+#endif
+
+ StandardFileReply reply ;
+ FileFilterYDUPP crossPlatformFileFilterUPP = 0 ;
+ #if !TARGET_CARBON
+ crossPlatformFileFilterUPP =
+ NewFileFilterYDProc(CrossPlatformFileFilter);
+ #endif
+
+ ExtendedOpenFile( prompt , path , m_wildCard , crossPlatformFileFilterUPP, &reply);
+ #if !TARGET_CARBON
+ DisposeFileFilterYDUPP(crossPlatformFileFilterUPP);
+ #endif
+ if ( reply.sfGood == false )
+ {
+ m_path = "" ;
+ return wxID_CANCEL ;
+ }
+ else
+ {
+ m_path = wxMacFSSpec2MacFilename( &reply.sfFile ) ;
+ return wxID_OK ;
+ }
+ }
return wxID_CANCEL;
}
+ else
+#endif
+ {
+ NavDialogOptions mNavOptions;
+ NavObjectFilterUPP mNavFilterUPP = NULL;
+ NavPreviewUPP mNavPreviewUPP = NULL ;
+ NavReplyRecord mNavReply;
+ AEDesc mDefaultLocation ;
+ bool mSelectDefault = false ;
+
+ ::NavGetDefaultDialogOptions(&mNavOptions);
+
+ mNavFilterUPP = nil;
+ mNavPreviewUPP = nil;
+ mSelectDefault = false;
+ mNavReply.validRecord = false;
+ mNavReply.replacing = false;
+ mNavReply.isStationery = false;
+ mNavReply.translationNeeded = false;
+ mNavReply.selection.descriptorType = typeNull;
+ mNavReply.selection.dataHandle = nil;
+ mNavReply.keyScript = smSystemScript;
+ mNavReply.fileTranslation = nil;
+
+ // Set default location, the location
+ // that's displayed when the dialog
+ // first appears
+
+ FSSpec location ;
+ wxMacFilename2FSSpec( m_dir , &location ) ;
+ OSErr err = noErr ;
+
+ mDefaultLocation.descriptorType = typeNull;
+ mDefaultLocation.dataHandle = nil;
+
+ err = ::AECreateDesc(typeFSS, &location, sizeof(FSSpec), &mDefaultLocation );
+
+ if ( mDefaultLocation.dataHandle ) {
+
+ if (mSelectDefault) {
+ mNavOptions.dialogOptionFlags |= kNavSelectDefaultLocation;
+ } else {
+ mNavOptions.dialogOptionFlags &= ~kNavSelectDefaultLocation;
+ }
+ }
+
+#if TARGET_CARBON
+ c2pstrcpy((StringPtr)mNavOptions.message, m_message) ;
+#else
+ strcpy((char *)mNavOptions.message, m_message) ;
+ c2pstr((char *)mNavOptions.message ) ;
+#endif
+#if TARGET_CARBON
+ c2pstrcpy((StringPtr)mNavOptions.savedFileName, m_fileName) ;
+#else
+ strcpy((char *)mNavOptions.savedFileName, m_fileName) ;
+ c2pstr((char *)mNavOptions.savedFileName ) ;
+#endif
+
+ if ( m_dialogStyle & wxSAVE )
+ {
+
+ mNavOptions.dialogOptionFlags |= kNavNoTypePopup ;
+ mNavOptions.dialogOptionFlags |= kNavDontAutoTranslate ;
+ mNavOptions.dialogOptionFlags |= kNavDontAddTranslateItems ;
+
+ err = ::NavPutFile(
+ &mDefaultLocation,
+ &mNavReply,
+ &mNavOptions,
+ sStandardNavEventFilter ,
+ 'TEXT',
+ 'TEXT',
+ 0L); // User Data
+ }
+ else
+ {
+ OpenUserDataRec myData;
+ MakeUserDataRec( &myData , m_wildCard ) ;
+ NavTypeListHandle typelist = NULL ;
+
+ if ( myData.numfilters > 0 )
+ {
+ mNavOptions.popupExtension = (NavMenuItemSpecArrayHandle) NewHandle( sizeof( NavMenuItemSpec ) * myData.numfilters ) ;
+ for ( int i = 0 ; i < myData.numfilters ; ++i ) {
+ (*mNavOptions.popupExtension)[i].version = kNavMenuItemSpecVersion ;
+ (*mNavOptions.popupExtension)[i].menuCreator = 'WXNG' ;
+ (*mNavOptions.popupExtension)[i].menuType = i ;
+ #if TARGET_CARBON
+ c2pstrcpy((StringPtr)(*mNavOptions.popupExtension)[i].menuItemName, myData.name[i]) ;
+ #else
+ strcpy((char *)(*mNavOptions.popupExtension)[i].menuItemName, myData.name[i]) ;
+ c2pstr((char *)(*mNavOptions.popupExtension)[i].menuItemName ) ;
+ #endif
+ }
+ }
+
+ mNavFilterUPP = NewNavObjectFilterUPP( CrossPlatformFilterCallback ) ;
+ if ( m_dialogStyle & wxMULTIPLE )
+ mNavOptions.dialogOptionFlags |= kNavAllowMultipleFiles ;
+ else
+ mNavOptions.dialogOptionFlags &= ~kNavAllowMultipleFiles ;
+
+ err = ::NavGetFile(
+ &mDefaultLocation,
+ &mNavReply,
+ &mNavOptions,
+ sStandardNavEventFilter ,
+ mNavPreviewUPP,
+ mNavFilterUPP,
+ typelist /*inFileTypes.TypeListHandle() */,
+ &myData); // User Data
+ if ( typelist )
+ DisposeHandle( (Handle) typelist ) ;
+ }
+
+ DisposeNavObjectFilterUPP(mNavFilterUPP);
+ if ( mDefaultLocation.dataHandle != nil )
+ {
+ ::AEDisposeDesc(&mDefaultLocation);
+ }
+
+ if ( (err != noErr) && (err != userCanceledErr) ) {
+ m_path = "" ;
+ return wxID_CANCEL ;
+ }
+
+ if (mNavReply.validRecord) {
+
+ FSSpec outFileSpec ;
+ AEDesc specDesc ;
+
+ long count ;
+ ::AECountItems( &mNavReply.selection , &count ) ;
+ for ( long i = 1 ; i <= count ; ++i )
+ {
+ OSErr err = ::AEGetNthDesc( &mNavReply.selection , i , typeFSS, NULL , &specDesc);
+ if ( err != noErr ) {
+ m_path = "" ;
+ return wxID_CANCEL ;
+ }
+ outFileSpec = **(FSSpec**) specDesc.dataHandle;
+ if (specDesc.dataHandle != nil) {
+ ::AEDisposeDesc(&specDesc);
+ }
+
+
+ // outFolderDirID = thePB.dirInfo.ioDrDirID;
+ m_path = wxMacFSSpec2MacFilename( &outFileSpec ) ;
+ m_paths.Add( m_path ) ;
+ m_fileNames.Add(m_fileName);
+ }
+ // set these to the first hit
+ m_path = m_paths[ 0 ] ;
+ m_fileName = wxFileNameFromPath(m_path);
+ m_dir = wxPathOnly(m_path);
+
+ return wxID_OK ;
+ }
+ return wxID_CANCEL;
+ }
+}
// Generic file load/save dialog
static wxString
projects / wxWidgets.git / blobdiff