/*

  File: NavServicesHandling.c

  Abstract: Code for putting up the standard save dialog.

  Version: <1.0>

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  The Apple Software is provided by Apple on an "AS IS" basis.  APPLE

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  Copyright © 2006 Apple Computer, Inc., All Rights Reserved

*/ 

#include "NavServicesHandling.h"

#include "AppDrawing.h"

#define kFileCreator            'blDG'

#define kFileTypePDF            'PDF '

#define kFileTypePNG            'PNGf'

#define kFileTypePDFCFStr       CFSTR("%@.pdf")     // format string for making the save as PDF file name

#define kFileTypePNGCFStr       CFSTR("%@.png")     // format string for making the save as PNG 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 ********/

typedef void ExportDataProc(CFURLRef url, OSType drawingCommand);

typedef struct ExportInfo{

    OSType      command;

    OSType      fileType;

}ExportInfo;

// This is the structure we're going to give to the save dialog to hang our data off of.

typedef struct OurSaveDialogData{   

    NavDialogRef    dialogRef;

    WindowRef       parentWindow;

    ExportDataProc  *exportProc;

    ExportInfo      exportInfo;

}OurSaveDialogData;

/**** Prototypes ****/

static OSStatus DoFSRefSave(const OurSaveDialogData *dialogDataP, NavReplyRecord* reply, 

                                                                    AEDesc *actualDescP);

static void NavEventProc( NavEventCallbackMessage callBackSelector, 

                                NavCBRecPtr callBackParms, void* callBackUD );

// This code originates from a version of the NavServices sample code in the CarbonLib SDK.

OSStatus DoExport(WindowRef w, OSType command, MyExportType exportType)

{

    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;

    CFStringRef saveAsFileNameFormatStr;

    ExportDataProc  *exportProc;

    OSType      fileType;

    CopyWindowTitleAsCFString(w, &tempString);

    switch(exportType){

        case exportTypePDF:

        saveAsFileNameFormatStr = kFileTypePDFCFStr;

        exportProc = myCreatePDFDocument;

        fileType = kFileTypePDF;

        break;

        default:

        case exportTypePNG:

        saveAsFileNameFormatStr = kFileTypePNGCFStr;

        exportProc = myExportCGDrawingAsPNG;

        fileType = kFileTypePNG;

        break;

    }

    dialogOptions.saveFileName = CFStringCreateWithFormat(kCFAllocatorDefault, NULL, 

                    saveAsFileNameFormatStr, 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->exportProc = exportProc;

        dialogDataP->exportInfo.command = command;

        dialogDataP->exportInfo.fileType = fileType;

        err = NavCreatePutFileDialog(&dialogOptions, fileType, 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;

}

static 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 FSRef.

                FSRef fsRef;

                // Get the FSRef back so we can write the file's data.

                if ((err = FSCreateFileUnicode( &fileRefParent, sourceLength, 

                                                    nameBuffer.unicode,

                                                    kFSCatInfoNone,

                                                    NULL,

                                                    &fsRef, 

                                                    NULL)) == noErr)

                {

                    FSCatalogInfo catInfo;

            FInfo *fileInfoP = (FInfo*)&catInfo.finderInfo;

                    fileInfoP->fdType = dialogDataP->exportInfo.fileType;

                    fileInfoP->fdCreator = kFileCreator;

                    fileInfoP->fdFlags = 0;

                    fileInfoP->fdLocation.h = 0;

                    fileInfoP->fdLocation.v = 0;

            err = FSSetCatalogInfo(&fsRef, kFSCatInfoFinderInfo, &catInfo);

                    if(!err){

            CFURLRef saveURL = CFURLCreateFromFSRef(NULL, &fsRef);

            if(saveURL){

                dialogDataP->exportProc(saveURL,  dialogDataP->exportInfo.command);

                err = NavCompleteSave( reply, kNavTranslateInPlace );

                if(err){

                // An error ocurred saving the file, so delete the copy 

                // left over.

                FSDeleteObject( &fsRef );

                DoErrorAlert(err, kMyWriteErrorFormatStrKey);

                }

                CFRelease(saveURL);

            }

            }

                }

            }

        }

    }

    return err;

}