/*

    File:       NavServicesHandling.c

    Contains:   Code to handle the save dialog for our sample application.

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    Copyright © 1999-2001 Apple Computer, Inc., All Rights Reserved

*/

#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;

}