/*

    File:       NavServicesHandling.c

    Contains:   Code to handle the open and save dialogs for our sample application.

    Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc.

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                Apple Computer, Inc. may be used to endorse or promote products derived from the

                Apple Software without specific prior written permission from Apple.  Except as

                expressly stated in this notice, no other rights or licenses, express or implied,

                are granted by Apple herein, including but not limited to any patent rights that

                may be infringed by your derivative works or by other works in which the Apple

                Software may be incorporated.

                The Apple Software is provided by Apple on an "AS IS" basis.  APPLE MAKES NO

                WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED

                WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR

                PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN

                COMBINATION WITH YOUR PRODUCTS.

                IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR

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

*/

#ifdef __APPLE_CC__

#include <Carbon/Carbon.h>

#else

#include <Carbon.h>

#endif

#include "NavServicesHandling.h"

#include "CGDrawPicture.h"

#include "UIHandling.h"

#define kFileCreator            'prvw'  // whatever app should own the PDF files we create

#define kFileTypePICT           'PICT'

#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 kOpenPrefKey            1

#define kSavePrefKey            2

/****  Typedefs ********/

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

typedef struct OurSaveDialogData{   

    NavDialogRef    dialogRef;

    Boolean     isOpenDialog;

    const void      *documentDataP;

}OurSaveDialogData;

/**** Prototypes ****/

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

                                                                    AEDesc *actualDescP);

static OSStatus GetFSSpecInfo( AEDesc* fileObject, FSSpec* returnSpec );

/****   Global Data ****/

OSStatus DoSaveAsPDF(WindowRef w, const void *ourDataP)

{

    OSStatus            err = noErr;

    NavDialogCreationOptions    dialogOptions;

    if (( 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->isOpenDialog = false;

        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;

}

static OSStatus DoFSRefSave(const OurSaveDialogData *dialogDataP, NavReplyRecord* reply, AEDesc *actualDescP)

{

    OSStatus    err = noErr;

    FSRef   fileRefParent;

    if ((err = AECoerceDesc( &reply->selection, typeFSRef, actualDescP )) == noErr)

    {

    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){

                if (( err = MakePDFDocument( &newFileSpec, dialogDataP->documentDataP)) == noErr )

                err = NavCompleteSave( reply, kNavTranslateInPlace );

                else{

                // an error ocurred saving the file, so delete the copy left over:

                (void)FSpDelete( &newFileSpec );

                DoErrorAlert(err, kMyWriteErrorFormatStrKey);

                }

            }

            }

        }

        }

    }

    }

    return err;

}

// *****************************************************************************

// *

// *    GetFSSpecInfo( )

// *

// *    Given a generic AEDesc, this routine returns the FSSpec of that object.

// *    Otherwise it returns an error.

// *    

// *****************************************************************************

static OSStatus GetFSSpecInfo( AEDesc* fileObject, FSSpec* returnSpec )

{

    OSStatus    theErr = noErr;

    AEDesc      theDesc;

    if ((theErr = AECoerceDesc( fileObject, typeFSS, &theDesc )) == noErr)

    {

    theErr = AEGetDescData( &theDesc, returnSpec, sizeof ( FSSpec ) );

    AEDisposeDesc( &theDesc );

    }

    else

    {

    if ((theErr = AECoerceDesc( fileObject, typeFSRef, &theDesc )) == noErr)

    {

        FSRef ref;

        if ((theErr = AEGetDescData( &theDesc, &ref, sizeof( FSRef ) )) == noErr)

        theErr = FSGetCatalogInfo( &ref, kFSCatInfoGettableInfo, NULL, NULL, returnSpec, NULL );

        AEDisposeDesc( &theDesc );

    }

    }

    return theErr;

}

OSStatus DoOpenDocument(void)

{

    OSStatus    err = noErr;

    NavDialogCreationOptions    dialogOptions;

    OurSaveDialogData *dialogDataP = NULL;

    // while our open dialog is up we'll disable our Open command, else

    // we might end up with more than one open dialog. Yuk

    DisableMenuCommand(NULL, kHICommandOpen);

    dialogDataP = (OurSaveDialogData *)calloc(1, sizeof(OurSaveDialogData));

    if(dialogDataP){

    dialogDataP->isOpenDialog = true;

    }else

    err = memFullErr;

    if (!err && ( err = NavGetDefaultDialogCreationOptions( &dialogOptions )) == noErr )

    {

    NavTypeListHandle   openListH = NULL;

    int         numTypes = 1;

    openListH = (NavTypeListHandle)NewHandle( sizeof(NavTypeList) + 

                        numTypes * sizeof(OSType) );

    (*openListH)->componentSignature = kNavGenericSignature;

    (*openListH)->reserved = 0;

    (*openListH)->osTypeCount = numTypes;

    (*openListH)->osType[0] = kFileTypePICT;

    dialogOptions.preferenceKey = kOpenPrefKey;

    dialogOptions.modality = kWindowModalityNone;   // make it modeless

    if ((err = NavCreateGetFileDialog(  &dialogOptions,

                        openListH,

                        gNavEventProc,

                        NULL,       // no custom previews

                        NULL,       // filter proc is NULL

                        dialogDataP,

                        &dialogDataP->dialogRef )) == noErr)

        {

        if (( err = NavDialogRun( dialogDataP->dialogRef )) != noErr){

            if ( dialogDataP->dialogRef != NULL ){

            NavDialogDispose( dialogDataP->dialogRef );

            dialogDataP->dialogRef = NULL;

            free(dialogDataP);

            }

        }

        }

    if ( openListH != NULL )

        DisposeHandle( (Handle)openListH );

    if(err == userCanceledErr)

        err = noErr;

    }

    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 MacOS X based only,

                                    this is not an issue.

                                */

                // assert(...)

                }

            }

            break;

            }

            case kNavUserActionOpen:

            {        

            if (dialogDataP != NULL )

            {   

                long count = 0;

                short index;

                err = AECountItems( &reply.selection, &count );

                for ( index = 1; index <= count; index++ )

                {

                AEKeyword   keyWord;

                AEDesc      theDesc;

                if (( err = AEGetNthDesc( &reply.selection, index, typeWildCard, &keyWord, &theDesc )) == noErr )

                {

                    FSSpec  fileSpec;

                    FInfo   fileInfo;

                    if (( err = GetFSSpecInfo( &theDesc, &fileSpec )) == noErr ){

                    // decide if the doc we are opening is a 'PICT':

                    if (( err = FSpGetFInfo( &fileSpec, &fileInfo)) == noErr )

                    {

                        if ( fileInfo.fdType == kFileTypePICT )

                        (void)doTheFile( &fileSpec );

                        else

                        {

                        // error:

                        // if we got this far, the document is a type we can't open and

                        // (most likely) built-in translation was turned off.

                        // You can alert the user that this returned selection or file spec

                        // needs translation.

                        }

                    }

                    }

                    AEDisposeDesc( &theDesc );

                }

                }

            }

            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;

        // re-enable open if needed

        if(dialogDataP->isOpenDialog)

            EnableMenuCommand(NULL, kHICommandOpen);

        free(dialogDataP);

            }

        }

    break;

    }

}