AppUsingSheets/Source/NavServicesHandling.c

/*
    File:       NavServicesHandling.c
    
    Contains:   Code to handle the save dialog for our sample application.
 
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*/
 
 
#include "MyCarbonPrinting.h"
#include "NavServicesHandling.h"
#include "AppDrawing.h"
#include "UIHandling.h"
 
#define kFileCreator            'prvw'
#define kFileTypePDF            'PDF '
 
#define kFileTypePDFCFStr       CFSTR("%@.pdf")     // our format string for making the save as file name
 
// these are values are used to keep "unique" set of preferences for each Nav dialog,
// for example: using more than one NavChooseObject style dialog in one application:
#define kSavePrefKey            1
 
/****  Typedefs ********/
 
// the structure we're going to give to the save dialog to hang our data off of
typedef struct OurSaveDialogData{   
    NavDialogRef    dialogRef;
    WindowRef       parentWindow;
    void        *documentDataP;
}OurSaveDialogData;
 
/**** Prototypes ****/
 
static OSStatus DoFSRefSave(const OurSaveDialogData *dialogDataP, NavReplyRecord* reply, 
                                                                    AEDesc *actualDescP);
 
/****   Global Data ****/
 
// this code originates from the NavServices sample code in the CarbonLib SDK
OSStatus DoSaveAsPDF(WindowRef w, void *ourDataP)
{
    OSStatus            err = noErr;
    static NavEventUPP  gNavEventProc = NULL;       // event proc for our Nav Dialogs 
    NavDialogCreationOptions    dialogOptions;
    if(!gNavEventProc){
        gNavEventProc = NewNavEventUPP(NavEventProc);
        if(!gNavEventProc)
            err = memFullErr;
    }
 
    if(!err && (( err = NavGetDefaultDialogCreationOptions( &dialogOptions )) == noErr ))
    {
    OurSaveDialogData *dialogDataP = NULL;
    CFStringRef tempString;
    CopyWindowTitleAsCFString(w, &tempString);
 
        dialogOptions.saveFileName = CFStringCreateWithFormat(kCFAllocatorDefault, NULL, 
                                                kFileTypePDFCFStr, tempString);
    
    CFRelease(tempString);
    
    // make the dialog modal to our parent doc, AKA sheets
        dialogOptions.parentWindow = w;
    dialogOptions.modality = kWindowModalityWindowModal;
    
    dialogDataP = (OurSaveDialogData *)malloc(sizeof(OurSaveDialogData));
    if(dialogDataP){
        dialogDataP->dialogRef = NULL;
        dialogDataP->parentWindow = w;
        dialogDataP->documentDataP = ourDataP;
        err = NavCreatePutFileDialog(&dialogOptions, kFileTypePDF, kFileCreator,
                            gNavEventProc, dialogDataP,
                            &dialogDataP->dialogRef);
        if (!err && dialogDataP->dialogRef != NULL)
        {
        err = NavDialogRun( dialogDataP->dialogRef );
        if (err != noErr)
        {
            NavDialogDispose( dialogDataP->dialogRef );
            dialogDataP->dialogRef = NULL;
            free(dialogDataP);
        }
        }
    }else
        err = memFullErr;
        
        if ( dialogOptions.saveFileName != NULL )
        CFRelease( dialogOptions.saveFileName );
 
    }
    return err;
}
 
pascal void NavEventProc( NavEventCallbackMessage callBackSelector, 
                                NavCBRecPtr callBackParms, void* callBackUD )
{
    OurSaveDialogData *dialogDataP = (OurSaveDialogData*)callBackUD;
    OSStatus    err = noErr;                
    
    switch( callBackSelector )
    {
    case kNavCBUserAction:
    {
        NavReplyRecord  reply;
        NavUserAction   userAction = 0;
        
        if ((err = NavDialogGetReply( callBackParms->context, &reply )) == noErr )
        {
        OSStatus tempErr;
        userAction = NavDialogGetUserAction( callBackParms->context );
                
        switch( userAction )
        {
            case kNavUserActionSaveAs:
            {
            if ( dialogDataP != NULL ){
                AEDesc  actualDesc;
                if (
                                (err = AECoerceDesc( &reply.selection, typeFSRef, &actualDesc )) 
                                        == noErr
                            )
                {   
                // the coercion succeeded as an FSRef, 
                                // so use HFS+ APIs to save the file:
                err = DoFSRefSave( dialogDataP, &reply, &actualDesc);
                AEDisposeDesc( &actualDesc );
                }else{
                                // the coercion failed as an FSRef, so get the FSSpec and 
                                // save the file
                                /*
                                    FSRef's don't exist on systems prior to MacOS 9 so 
                                    there it is necessary to have a different approach as shown in 
                                    the Nav Services sample in the CarbonSDK. Since this code is 
                                    used on MacOS X only, this is not an issue.
                                */
                // assert(...)
                }
            }
            break;
            }
                                        
            case kNavUserActionCancel:
                //..
                break;
                        
            case kNavUserActionNewFolder:
                //..
                break;
        }
              
        tempErr = NavDisposeReply( &reply );
        if(!err)
            err = tempErr;
            }
            break;
    }
            
    case kNavCBTerminate:
    {
        if( dialogDataP != NULL )
        {
                if(dialogDataP->dialogRef)
            NavDialogDispose(dialogDataP->dialogRef );
            
                dialogDataP->dialogRef = NULL;
        free(dialogDataP);
            }
        
        }
    break;
    }
}
 
static OSStatus DoFSRefSave(const OurSaveDialogData *dialogDataP, 
                                    NavReplyRecord* reply, AEDesc *actualDescP)
{
    OSStatus    err = noErr;
    FSRef   fileRefParent;
        
    if ((err = AEGetDescData( actualDescP, &fileRefParent, sizeof( FSRef ) )) == noErr )
    {
        // get the name data and its length:    
        HFSUniStr255    nameBuffer;
        UniCharCount    sourceLength = 0;
        
        sourceLength = (UniCharCount)CFStringGetLength( reply->saveFileName );
        
        CFStringGetCharacters( reply->saveFileName, CFRangeMake( 0, sourceLength ), 
                                                        (UniChar*)&nameBuffer.unicode );
        
        if ( sourceLength > 0 )
        {   
            if ( reply->replacing )
            {
                // delete the file we are replacing:
                FSRef fileToDelete;
                if ((err = FSMakeFSRefUnicode( &fileRefParent, sourceLength, nameBuffer.unicode, 
                                    kTextEncodingUnicodeDefault, &fileToDelete )) == noErr )
                {
                    err = FSDeleteObject( &fileToDelete );
                    if ( err == fBsyErr ){
                        DoErrorAlert(fBsyErr, kMyDeleteErrorFormatStrKey);
                    }
                }
            }
                            
            if ( err == noErr )
            {
                // create the file based on Unicode, but we can write the file's data with an FSSpec:
                FSSpec newFileSpec;
 
                // get the FSSpec back so we can write the file's data
                if ((err = FSCreateFileUnicode( &fileRefParent, sourceLength, 
                                                    nameBuffer.unicode,
                                                    kFSCatInfoNone,
                                                    NULL,
                                                    NULL,   
                                                    &newFileSpec)) == noErr)
                {
                    FInfo fileInfo;
                    fileInfo.fdType = kFileTypePDF;
                    fileInfo.fdCreator = kFileCreator;
                    err = FSpSetFInfo( &newFileSpec, &fileInfo );
                    // now that we have the FSSpec, we can proceed with the save operation:
                    if(!err){
                        FSRef fsRef;
                        err = FSpMakeFSRef(&newFileSpec, &fsRef);   // make an FSRef
                        if(!err){
                            CFURLRef saveURL = CFURLCreateFromFSRef(NULL, &fsRef);
                            if(saveURL){
                                // delete the file we just made for making the FSRef
                                err = FSpDelete(&newFileSpec);  
                                if(!err)
                                    err = MakePDFDocument(dialogDataP->parentWindow, 
                                                            dialogDataP->documentDataP, 
                                                            saveURL);
                                if(!err)
                                    err = NavCompleteSave( reply, kNavTranslateInPlace );
                                
                                if(err){
                                    // an error ocurred saving the file, so delete the copy 
                                    // left over:
                                    (void)FSpDelete( &newFileSpec );
                                    DoErrorAlert(err, kMyWriteErrorFormatStrKey);
                                }
                                CFRelease(saveURL);
                            }else{
                                // delete the file we just made for making the FSRe
                               (void)FSpDelete(&newFileSpec);
                                err = kCantCreateSaveURL;
                                DoErrorAlert(err, kMyCreateURLErrorFormatStrKey);
                            }
                        }
                    }
                }
            }
        }
    }
    return err;
}