/*

File: nav.c

Abstract:  Helper routines for file open & save dialogs.

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*/

#include "nav.h"

#include "document_window.h"

//---------------------------------------------------------------------

// Gets a file to open from the user. Caller must release the CFURLRef.

//

CFURLRef GetOpenFileFromUser(void)

{

    NavDialogCreationOptions dialogOptions;

    NavDialogRef dialog;

    NavReplyRecord replyRecord;

    CFURLRef fileAsCFURLRef = NULL;

    FSRef fileAsFSRef;

    OSStatus status;

    // Get the standard set of defaults

    status = NavGetDefaultDialogCreationOptions(&dialogOptions);

    require_noerr( status, CantGetNavOptions );

    // Make the window app-wide modal

    dialogOptions.modality = kWindowModalityAppModal;

    // Create the dialog

    status = NavCreateGetFileDialog(&dialogOptions, NULL, NULL, NULL, NULL, NULL, &dialog);

    require_noerr( status, CantCreateDialog );

    // Show it

    status = NavDialogRun(dialog);

    require_noerr( status, CantRunDialog );

    // Get the reply

    status = NavDialogGetReply(dialog, &replyRecord);

    require( ((status == noErr) || (status == userCanceledErr)), CantGetReply );

    // If the user clicked "Cancel", just bail

    if ( status == userCanceledErr ) goto UserCanceled;

    // Get the file

    status = AEGetNthPtr(&(replyRecord.selection), 1, typeFSRef, NULL, NULL, &fileAsFSRef, sizeof(FSRef), NULL);

    require_noerr( status, CantExtractFSRef );

    // Convert it to a CFURL

    fileAsCFURLRef = CFURLCreateFromFSRef(NULL, &fileAsFSRef);

    // Cleanup

CantExtractFSRef:

UserCanceled:

    verify_noerr( NavDisposeReply(&replyRecord) );

CantGetReply:

CantRunDialog:

    NavDialogDispose(dialog);

CantCreateDialog:

CantGetNavOptions:

    return fileAsCFURLRef;

}

//---------------------------------------------------------------------

// Gets a file to save from the user. Caller must release the CFURLRef.

//

CFURLRef GetSaveFileFromUser(WindowRef window)

{

    CFURLRef previousFile;

    CFStringRef saveFileName;

    UniChar *chars = NULL;

    CFIndex length;

    NavDialogCreationOptions dialogOptions;

    NavDialogRef dialog;

    NavReplyRecord replyRecord;

    CFURLRef fileAsCFURLRef = NULL;

    FSRef fileAsFSRef;

    FSRef parentDirectory;

    OSStatus status;

    if ( window == NULL ) return NULL;

    // Get the standard set of defaults

    status = NavGetDefaultDialogCreationOptions(&dialogOptions);

    require_noerr( status, CantGetNavOptions );

    // Change a few things (app-wide modal, show the extension)

    dialogOptions.modality = kWindowModalityAppModal;

    dialogOptions.parentWindow = window;

    dialogOptions.optionFlags = kNavDefaultNavDlogOptions | kNavPreserveSaveFileExtension;

    // Set up the default save name

    previousFile = GetWindowProxyFileCFURL(window);

    if (previousFile == NULL)

        dialogOptions.saveFileName = CFStringCreateWithCString(NULL, "Untitled.rtf", kCFStringEncodingASCII);

    else    

        dialogOptions.saveFileName = CFURLCopyLastPathComponent(previousFile);

    // Create the dialog

    status = NavCreatePutFileDialog(&dialogOptions, kUnknownType, kUnknownType, NULL, NULL, &dialog);

    require_noerr( status, CantCreateDialog );

    // Show it

    status = NavDialogRun(dialog);

    require_noerr( status, CantRunDialog );

    // Get the reply

    status = NavDialogGetReply(dialog, &replyRecord);

    require( ((status == noErr) || (status == userCanceledErr)), CantGetReply );

    // If the user clicked "Cancel", just bail

    if ( status == userCanceledErr ) goto UserCanceled;

    // Get the file's location and name

    status = AEGetNthPtr(&(replyRecord.selection), 1, typeFSRef, NULL, NULL, &parentDirectory, sizeof(FSRef), NULL);

    require_noerr( status, CantExtractFSRef );

    saveFileName = replyRecord.saveFileName;

    length = CFStringGetLength(saveFileName);

    chars = malloc(length * sizeof(UniChar));

    CFStringGetCharacters(saveFileName, CFRangeMake(0, length), chars);

    // If we are replacing a file, erase the previous one

    if ( replyRecord.replacing ) {

        status = FSMakeFSRefUnicode(&parentDirectory, length, chars, kTextEncodingUnknown, &fileAsFSRef);

        require_noerr( status, CantMakeFSRef );

        status = FSDeleteObject(&fileAsFSRef);

        require_noerr( status, CantDeletePreviousFile );

    }

    // Create the file

    status = FSCreateFileUnicode(&parentDirectory, length, chars, kFSCatInfoNone, NULL, &fileAsFSRef, NULL);

    require_noerr( status, CantCreateSaveFile );

    // Convert the reference to the file to a CFURL

    fileAsCFURLRef = CFURLCreateFromFSRef(NULL, &fileAsFSRef);

    // Cleanup

CantCreateSaveFile:

CantDeletePreviousFile:

CantMakeFSRef:

    if ( chars != NULL ) free(chars);

CantExtractFSRef:

UserCanceled:

    verify_noerr( NavDisposeReply(&replyRecord) );

CantGetReply:

CantRunDialog:

    NavDialogDispose(dialog);

CantCreateDialog:

    if (previousFile) CFRelease(previousFile);

    CFRelease(dialogOptions.saveFileName);

CantGetNavOptions:

    return fileAsCFURLRef;

}